diff --git a/package.json b/package.json
index 0cfbbaa..c806717 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "docfast-api",
-  "version": "0.3.4",
+  "version": "0.4.0",
   "description": "Markdown/HTML to PDF API with built-in invoice templates",
   "main": "dist/index.js",
   "scripts": {
diff --git a/public/app.js b/public/app.js
index 3a865bc..aa1806e 100644
--- a/public/app.js
+++ b/public/app.js
@@ -1,14 +1,5 @@
-var signupEmail = '';
 var recoverEmail = '';
 
-function showState(state) {
-  ['signupInitial', 'signupLoading', 'signupVerify', 'signupResult'].forEach(function(id) {
-    var el = document.getElementById(id);
-    if (el) el.classList.remove('active');
-  });
-  document.getElementById(state).classList.add('active');
-}
-
 function showRecoverState(state) {
   ['recoverInitial', 'recoverLoading', 'recoverVerify', 'recoverResult'].forEach(function(id) {
     var el = document.getElementById(id);
@@ -17,23 +8,7 @@ function showRecoverState(state) {
   document.getElementById(state).classList.add('active');
 }
 
-function openSignup() {
-  document.getElementById('signupModal').classList.add('active');
-  showState('signupInitial');
-  document.getElementById('signupError').style.display = 'none';
-  document.getElementById('verifyError').style.display = 'none';
-  document.getElementById('signupEmail').value = '';
-  document.getElementById('verifyCode').value = '';
-  signupEmail = '';
-  setTimeout(function() { document.getElementById('signupEmail').focus(); }, 100);
-}
-
-function closeSignup() {
-  document.getElementById('signupModal').classList.remove('active');
-}
-
 function openRecover() {
-  closeSignup();
   document.getElementById('recoverModal').classList.add('active');
   showRecoverState('recoverInitial');
   var errEl = document.getElementById('recoverError');
@@ -50,92 +25,6 @@ function closeRecover() {
   document.getElementById('recoverModal').classList.remove('active');
 }
 
-async function submitSignup() {
-  var errEl = document.getElementById('signupError');
-  var btn = document.getElementById('signupBtn');
-  var emailInput = document.getElementById('signupEmail');
-  var email = emailInput.value.trim();
-
-  if (!email || !/^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(email)) {
-    errEl.textContent = 'Please enter a valid email address.';
-    errEl.style.display = 'block';
-    return;
-  }
-
-  errEl.style.display = 'none';
-  btn.disabled = true;
-  showState('signupLoading');
-
-  try {
-    var res = await fetch('/v1/signup/free', {
-      method: 'POST',
-      headers: { 'Content-Type': 'application/json' },
-      body: JSON.stringify({ email: email })
-    });
-    var data = await res.json();
-
-    if (!res.ok) {
-      showState('signupInitial');
-      errEl.textContent = data.error || 'Something went wrong. Please try again.';
-      errEl.style.display = 'block';
-      btn.disabled = false;
-      return;
-    }
-
-    signupEmail = email;
-    document.getElementById('verifyEmailDisplay').textContent = email;
-    showState('signupVerify');
-    document.getElementById('verifyCode').focus();
-    btn.disabled = false;
-  } catch (err) {
-    showState('signupInitial');
-    errEl.textContent = 'Network error. Please try again.';
-    errEl.style.display = 'block';
-    btn.disabled = false;
-  }
-}
-
-async function submitVerify() {
-  var errEl = document.getElementById('verifyError');
-  var btn = document.getElementById('verifyBtn');
-  var codeInput = document.getElementById('verifyCode');
-  var code = codeInput.value.trim();
-
-  if (!code || !/^\d{6}$/.test(code)) {
-    errEl.textContent = 'Please enter a 6-digit code.';
-    errEl.style.display = 'block';
-    return;
-  }
-
-  errEl.style.display = 'none';
-  btn.disabled = true;
-
-  try {
-    var res = await fetch('/v1/signup/verify', {
-      method: 'POST',
-      headers: { 'Content-Type': 'application/json' },
-      body: JSON.stringify({ email: signupEmail, code: code })
-    });
-    var data = await res.json();
-
-    if (!res.ok) {
-      errEl.textContent = data.error || 'Verification failed.';
-      errEl.style.display = 'block';
-      btn.disabled = false;
-      return;
-    }
-
-    document.getElementById('apiKeyText').textContent = data.apiKey;
-    showState('signupResult');
-    var resultH2 = document.querySelector('#signupResult h2');
-    if (resultH2) { resultH2.setAttribute('tabindex', '-1'); resultH2.focus(); }
-  } catch (err) {
-    errEl.textContent = 'Network error. Please try again.';
-    errEl.style.display = 'block';
-    btn.disabled = false;
-  }
-}
-
 async function submitRecover() {
   var errEl = document.getElementById('recoverError');
   var btn = document.getElementById('recoverBtn');
@@ -228,12 +117,6 @@ async function submitRecoverVerify() {
   }
 }
 
-function copyKey() {
-  var key = document.getElementById('apiKeyText').textContent;
-  var btn = document.getElementById('copyBtn');
-  doCopy(key, btn);
-}
-
 function copyRecoveredKey() {
   var key = document.getElementById('recoveredKeyText').textContent;
   var btn = document.getElementById('copyRecoveredBtn');
@@ -252,52 +135,32 @@ function doCopy(text, btn) {
   try {
     if (navigator.clipboard && window.isSecureContext) {
       navigator.clipboard.writeText(text).then(showCopied).catch(function() {
-        // Fallback to execCommand
-        try {
-          var ta = document.createElement('textarea');
-          ta.value = text; 
-          ta.style.position = 'fixed'; 
-          ta.style.opacity = '0';
-          ta.style.top = '-9999px';
-          ta.style.left = '-9999px';
-          document.body.appendChild(ta);
-          ta.focus();
-          ta.select();
-          var success = document.execCommand('copy');
-          document.body.removeChild(ta);
-          if (success) {
-            showCopied();
-          } else {
-            showFailed();
-          }
-        } catch (err) {
-          showFailed();
-        }
+        fallbackCopy(text, showCopied, showFailed);
       });
     } else {
-      // Direct fallback for non-secure contexts
-      var ta = document.createElement('textarea');
-      ta.value = text; 
-      ta.style.position = 'fixed'; 
-      ta.style.opacity = '0';
-      ta.style.top = '-9999px';
-      ta.style.left = '-9999px';
-      document.body.appendChild(ta);
-      ta.focus();
-      ta.select();
-      var success = document.execCommand('copy');
-      document.body.removeChild(ta);
-      if (success) {
-        showCopied();
-      } else {
-        showFailed();
-      }
+      fallbackCopy(text, showCopied, showFailed);
     }
   } catch(e) {
     showFailed();
   }
 }
 
+function fallbackCopy(text, onSuccess, onFail) {
+  try {
+    var ta = document.createElement('textarea');
+    ta.value = text;
+    ta.style.position = 'fixed';
+    ta.style.opacity = '0';
+    ta.style.top = '-9999px';
+    document.body.appendChild(ta);
+    ta.focus();
+    ta.select();
+    var success = document.execCommand('copy');
+    document.body.removeChild(ta);
+    success ? onSuccess() : onFail();
+  } catch(e) { onFail(); }
+}
+
 async function checkout() {
   try {
     var res = await fetch('/v1/billing/checkout', { method: 'POST' });
@@ -309,19 +172,71 @@ async function checkout() {
   }
 }
 
+// === Demo Playground ===
+async function generateDemo() {
+  var btn = document.getElementById('demoGenerateBtn');
+  var status = document.getElementById('demoStatus');
+  var result = document.getElementById('demoResult');
+  var errorEl = document.getElementById('demoError');
+  var html = document.getElementById('demoHtml').value.trim();
+
+  if (!html) {
+    errorEl.textContent = 'Please enter some HTML.';
+    errorEl.style.display = 'block';
+    result.style.display = 'none';
+    return;
+  }
+
+  errorEl.style.display = 'none';
+  result.style.display = 'none';
+  btn.disabled = true;
+  status.textContent = 'Generating PDF…';
+
+  try {
+    var res = await fetch('/v1/demo/html', {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ html: html })
+    });
+
+    if (!res.ok) {
+      var data = await res.json();
+      errorEl.textContent = data.error || 'Something went wrong.';
+      errorEl.style.display = 'block';
+      btn.disabled = false;
+      status.textContent = '';
+      return;
+    }
+
+    var blob = await res.blob();
+    var url = URL.createObjectURL(blob);
+    var dl = document.getElementById('demoDownload');
+    dl.href = url;
+    result.style.display = 'block';
+    status.textContent = '';
+    btn.disabled = false;
+  } catch (err) {
+    errorEl.textContent = 'Network error. Please try again.';
+    errorEl.style.display = 'block';
+    btn.disabled = false;
+    status.textContent = '';
+  }
+}
+
+// === Init ===
 document.addEventListener('DOMContentLoaded', function() {
-  // BUG-068: Open change email modal if navigated via #change-email hash
+  // BUG-068: Open change email modal if navigated via hash
   if (window.location.hash === '#change-email') {
     openEmailChange();
   }
 
-  document.getElementById('btn-signup').addEventListener('click', openSignup);
-  document.getElementById('btn-signup-2').addEventListener('click', openSignup);
+  // Demo playground
+  document.getElementById('demoGenerateBtn').addEventListener('click', generateDemo);
+  
+  // Checkout buttons
   document.getElementById('btn-checkout').addEventListener('click', checkout);
-  document.getElementById('btn-close-signup').addEventListener('click', closeSignup);
-  document.getElementById('signupBtn').addEventListener('click', submitSignup);
-  document.getElementById('verifyBtn').addEventListener('click', submitVerify);
-  document.getElementById('copyBtn').addEventListener('click', copyKey);
+  var heroCheckout = document.getElementById('btn-checkout-hero');
+  if (heroCheckout) heroCheckout.addEventListener('click', checkout);
 
   // Recovery modal
   document.getElementById('btn-close-recover').addEventListener('click', closeRecover);
@@ -337,13 +252,13 @@ document.addEventListener('DOMContentLoaded', function() {
     el.addEventListener('click', function(e) { e.preventDefault(); openRecover(); });
   });
 
-  document.getElementById('signupModal').addEventListener('click', function(e) {
-    if (e.target === this) closeSignup();
-  });
+  // Smooth scroll for hash links
   document.querySelectorAll('a[href^="#"]').forEach(function(a) {
     a.addEventListener('click', function(e) {
+      var target = this.getAttribute('href');
+      if (target === '#') return;
       e.preventDefault();
-      var el = document.querySelector(this.getAttribute('href'));
+      var el = document.querySelector(target);
       if (el) el.scrollIntoView({ behavior: 'smooth' });
     });
   });
@@ -362,7 +277,6 @@ function showEmailChangeState(state) {
 }
 
 function openEmailChange() {
-  closeSignup();
   closeRecover();
   document.getElementById('emailChangeModal').classList.add('active');
   showEmailChangeState('emailChangeInitial');
@@ -472,7 +386,7 @@ async function submitEmailChangeVerify() {
   }
 }
 
-// Add event listeners for email change (append to DOMContentLoaded)
+// Email change event listeners
 document.addEventListener('DOMContentLoaded', function() {
   var closeBtn = document.getElementById('btn-close-email-change');
   if (closeBtn) closeBtn.addEventListener('click', closeEmailChange);
@@ -494,7 +408,7 @@ document.addEventListener('DOMContentLoaded', function() {
 // === Accessibility: Escape key closes modals, focus trapping ===
 (function() {
   function getActiveModal() {
-    var modals = ['signupModal', 'recoverModal', 'emailChangeModal'];
+    var modals = ['recoverModal', 'emailChangeModal'];
     for (var i = 0; i < modals.length; i++) {
       var m = document.getElementById(modals[i]);
       if (m && m.classList.contains('active')) return m;
@@ -511,7 +425,6 @@ document.addEventListener('DOMContentLoaded', function() {
   document.addEventListener('keydown', function(e) {
     if (e.key === 'Escape') closeActiveModal();
 
-    // Focus trap inside active modal
     if (e.key === 'Tab') {
       var modal = getActiveModal();
       if (!modal) return;
diff --git a/public/app.min.js b/public/app.min.js
index 6b5d8f6..904a38d 100644
--- a/public/app.min.js
+++ b/public/app.min.js
@@ -1 +1 @@
-var signupEmail="",recoverEmail="";function showState(e){["signupInitial","signupLoading","signupVerify","signupResult"].forEach(function(e){var t=document.getElementById(e);t&&t.classList.remove("active")}),document.getElementById(e).classList.add("active")}function showRecoverState(e){["recoverInitial","recoverLoading","recoverVerify","recoverResult"].forEach(function(e){var t=document.getElementById(e);t&&t.classList.remove("active")}),document.getElementById(e).classList.add("active")}function openSignup(){document.getElementById("signupModal").classList.add("active"),showState("signupInitial"),document.getElementById("signupError").style.display="none",document.getElementById("verifyError").style.display="none",document.getElementById("signupEmail").value="",document.getElementById("verifyCode").value="",signupEmail="",setTimeout(function(){document.getElementById("signupEmail").focus()},100)}function closeSignup(){document.getElementById("signupModal").classList.remove("active")}function openRecover(){closeSignup(),document.getElementById("recoverModal").classList.add("active"),showRecoverState("recoverInitial");var e=document.getElementById("recoverError");e&&(e.style.display="none");var t=document.getElementById("recoverVerifyError");t&&(t.style.display="none"),document.getElementById("recoverEmailInput").value="",document.getElementById("recoverCode").value="",recoverEmail="",setTimeout(function(){document.getElementById("recoverEmailInput").focus()},100)}function closeRecover(){document.getElementById("recoverModal").classList.remove("active")}async function submitSignup(){var e=document.getElementById("signupError"),t=document.getElementById("signupBtn"),n=document.getElementById("signupEmail").value.trim();if(!n||!/^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(n))return e.textContent="Please enter a valid email address.",void(e.style.display="block");e.style.display="none",t.disabled=!0,showState("signupLoading");try{var a=await fetch("/v1/signup/free",{method:"POST",headers:{"Content-Type":"application/json"},body:JSON.stringify({email:n})}),i=await a.json();if(!a.ok)return showState("signupInitial"),e.textContent=i.error||"Something went wrong. Please try again.",e.style.display="block",void(t.disabled=!1);signupEmail=n,document.getElementById("verifyEmailDisplay").textContent=n,showState("signupVerify"),document.getElementById("verifyCode").focus(),t.disabled=!1}catch(n){showState("signupInitial"),e.textContent="Network error. Please try again.",e.style.display="block",t.disabled=!1}}async function submitVerify(){var e=document.getElementById("verifyError"),t=document.getElementById("verifyBtn"),n=document.getElementById("verifyCode").value.trim();if(!n||!/^\d{6}$/.test(n))return e.textContent="Please enter a 6-digit code.",void(e.style.display="block");e.style.display="none",t.disabled=!0;try{var a=await fetch("/v1/signup/verify",{method:"POST",headers:{"Content-Type":"application/json"},body:JSON.stringify({email:signupEmail,code:n})}),i=await a.json();if(!a.ok)return e.textContent=i.error||"Verification failed.",e.style.display="block",void(t.disabled=!1);document.getElementById("apiKeyText").textContent=i.apiKey,showState("signupResult"),function(){var h=document.querySelector("#signupResult h2");h&&(h.setAttribute("tabindex","-1"),h.focus())}()}catch(n){e.textContent="Network error. Please try again.",e.style.display="block",t.disabled=!1}}async function submitRecover(){var e=document.getElementById("recoverError"),t=document.getElementById("recoverBtn"),n=document.getElementById("recoverEmailInput").value.trim();if(!n||!/^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(n))return e.textContent="Please enter a valid email address.",void(e.style.display="block");e.style.display="none",t.disabled=!0,showRecoverState("recoverLoading");try{var a=await fetch("/v1/recover",{method:"POST",headers:{"Content-Type":"application/json"},body:JSON.stringify({email:n})}),i=await a.json();if(!a.ok)return showRecoverState("recoverInitial"),e.textContent=i.error||"Something went wrong.",e.style.display="block",void(t.disabled=!1);recoverEmail=n,document.getElementById("recoverEmailDisplay").textContent=n,showRecoverState("recoverVerify"),document.getElementById("recoverCode").focus(),t.disabled=!1}catch(n){showRecoverState("recoverInitial"),e.textContent="Network error. Please try again.",e.style.display="block",t.disabled=!1}}async function submitRecoverVerify(){var e=document.getElementById("recoverVerifyError"),t=document.getElementById("recoverVerifyBtn"),n=document.getElementById("recoverCode").value.trim();if(!n||!/^\d{6}$/.test(n))return e.textContent="Please enter a 6-digit code.",void(e.style.display="block");e.style.display="none",t.disabled=!0;try{var a=await fetch("/v1/recover/verify",{method:"POST",headers:{"Content-Type":"application/json"},body:JSON.stringify({email:recoverEmail,code:n})}),i=await a.json();if(!a.ok)return e.textContent=i.error||"Verification failed.",e.style.display="block",void(t.disabled=!1);i.apiKey?(document.getElementById("recoveredKeyText").textContent=i.apiKey,showRecoverState("recoverResult"),function(){var h=document.querySelector("#recoverResult h2");h&&(h.setAttribute("tabindex","-1"),h.focus())}()):(e.textContent=i.message||"No key found for this email.",e.style.display="block",t.disabled=!1)}catch(n){e.textContent="Network error. Please try again.",e.style.display="block",t.disabled=!1}}function copyKey(){doCopy(document.getElementById("apiKeyText").textContent,document.getElementById("copyBtn"))}function copyRecoveredKey(){doCopy(document.getElementById("recoveredKeyText").textContent,document.getElementById("copyRecoveredBtn"))}function doCopy(e,t){function n(){t.textContent="✓ Copied!",setTimeout(function(){t.textContent="Copy"},2e3)}function a(){t.textContent="Failed",setTimeout(function(){t.textContent="Copy"},2e3)}try{if(navigator.clipboard&&window.isSecureContext)navigator.clipboard.writeText(e).then(n).catch(function(){try{var t=document.createElement("textarea");t.value=e,t.style.position="fixed",t.style.opacity="0",t.style.top="-9999px",t.style.left="-9999px",document.body.appendChild(t),t.focus(),t.select();var i=document.execCommand("copy");document.body.removeChild(t),i?n():a()}catch(e){a()}});else{var i=document.createElement("textarea");i.value=e,i.style.position="fixed",i.style.opacity="0",i.style.top="-9999px",i.style.left="-9999px",document.body.appendChild(i),i.focus(),i.select();var o=document.execCommand("copy");document.body.removeChild(i),o?n():a()}}catch(e){a()}}async function checkout(){try{var e=await fetch("/v1/billing/checkout",{method:"POST"}),t=await e.json();t.url?window.location.href=t.url:alert("Checkout is not available yet. Please try again later.")}catch(e){alert("Something went wrong. Please try again.")}}document.addEventListener("DOMContentLoaded",function(){document.getElementById("btn-signup").addEventListener("click",openSignup),document.getElementById("btn-signup-2").addEventListener("click",openSignup),document.getElementById("btn-checkout").addEventListener("click",checkout),document.getElementById("btn-close-signup").addEventListener("click",closeSignup),document.getElementById("signupBtn").addEventListener("click",submitSignup),document.getElementById("verifyBtn").addEventListener("click",submitVerify),document.getElementById("copyBtn").addEventListener("click",copyKey),document.getElementById("btn-close-recover").addEventListener("click",closeRecover),document.getElementById("recoverBtn").addEventListener("click",submitRecover),document.getElementById("recoverVerifyBtn").addEventListener("click",submitRecoverVerify),document.getElementById("copyRecoveredBtn").addEventListener("click",copyRecoveredKey),document.getElementById("recoverModal").addEventListener("click",function(e){e.target===this&&closeRecover()}),document.querySelectorAll(".open-recover").forEach(function(e){e.addEventListener("click",function(e){e.preventDefault(),openRecover()})}),document.getElementById("signupModal").addEventListener("click",function(e){e.target===this&&closeSignup()}),document.querySelectorAll('a[href^="#"]').forEach(function(e){e.addEventListener("click",function(e){e.preventDefault();var t=document.querySelector(this.getAttribute("href"));t&&t.scrollIntoView({behavior:"smooth"})})})});var emailChangeApiKey="",emailChangeNewEmail="";function showEmailChangeState(e){["emailChangeInitial","emailChangeLoading","emailChangeVerify","emailChangeResult"].forEach(function(e){var t=document.getElementById(e);t&&t.classList.remove("active")}),document.getElementById(e).classList.add("active")}function openEmailChange(){closeSignup(),closeRecover(),document.getElementById("emailChangeModal").classList.add("active"),showEmailChangeState("emailChangeInitial");var e=document.getElementById("emailChangeError");e&&(e.style.display="none");var t=document.getElementById("emailChangeVerifyError");t&&(t.style.display="none"),document.getElementById("emailChangeApiKey").value="",document.getElementById("emailChangeNewEmail").value="",document.getElementById("emailChangeCode").value="",emailChangeApiKey="",emailChangeNewEmail=""}function closeEmailChange(){document.getElementById("emailChangeModal").classList.remove("active")}async function submitEmailChange(){var e=document.getElementById("emailChangeError"),t=document.getElementById("emailChangeBtn"),n=document.getElementById("emailChangeApiKey").value.trim(),a=document.getElementById("emailChangeNewEmail").value.trim();if(!n)return e.textContent="Please enter your API key.",void(e.style.display="block");if(!a||!/^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(a))return e.textContent="Please enter a valid email address.",void(e.style.display="block");e.style.display="none",t.disabled=!0,showEmailChangeState("emailChangeLoading");try{var i=await fetch("/v1/email-change",{method:"POST",headers:{"Content-Type":"application/json"},body:JSON.stringify({apiKey:n,newEmail:a})}),o=await i.json();if(!i.ok)return showEmailChangeState("emailChangeInitial"),e.textContent=o.error||"Something went wrong.",e.style.display="block",void(t.disabled=!1);emailChangeApiKey=n,emailChangeNewEmail=a,document.getElementById("emailChangeEmailDisplay").textContent=a,showEmailChangeState("emailChangeVerify"),document.getElementById("emailChangeCode").focus(),t.disabled=!1}catch(n){showEmailChangeState("emailChangeInitial"),e.textContent="Network error. Please try again.",e.style.display="block",t.disabled=!1}}async function submitEmailChangeVerify(){var e=document.getElementById("emailChangeVerifyError"),t=document.getElementById("emailChangeVerifyBtn"),n=document.getElementById("emailChangeCode").value.trim();if(!n||!/^\d{6}$/.test(n))return e.textContent="Please enter a 6-digit code.",void(e.style.display="block");e.style.display="none",t.disabled=!0;try{var a=await fetch("/v1/email-change/verify",{method:"POST",headers:{"Content-Type":"application/json"},body:JSON.stringify({apiKey:emailChangeApiKey,newEmail:emailChangeNewEmail,code:n})}),i=await a.json();if(!a.ok)return e.textContent=i.error||"Verification failed.",e.style.display="block",void(t.disabled=!1);document.getElementById("emailChangeNewDisplay").textContent=i.newEmail||emailChangeNewEmail,showEmailChangeState("emailChangeResult"),function(){var h=document.querySelector("#emailChangeResult h2");h&&(h.setAttribute("tabindex","-1"),h.focus())}()}catch(n){e.textContent="Network error. Please try again.",e.style.display="block",t.disabled=!1}}document.addEventListener("DOMContentLoaded",function(){var e=document.getElementById("btn-close-email-change");e&&e.addEventListener("click",closeEmailChange);var t=document.getElementById("emailChangeBtn");t&&t.addEventListener("click",submitEmailChange);var n=document.getElementById("emailChangeVerifyBtn");n&&n.addEventListener("click",submitEmailChangeVerify);var a=document.getElementById("emailChangeModal");a&&a.addEventListener("click",function(e){e.target===this&&closeEmailChange()}),document.querySelectorAll(".open-email-change").forEach(function(e){e.addEventListener("click",function(e){e.preventDefault(),openEmailChange()})})}),function(){function e(){for(var e=["signupModal","recoverModal","emailChangeModal"],t=0;t<e.length;t++){var n=document.getElementById(e[t]);if(n&&n.classList.contains("active"))return n}return null}document.addEventListener("keydown",function(t){var n;if("Escape"===t.key&&((n=e())&&n.classList.remove("active")),"Tab"===t.key){var a=e();if(!a)return;var i=a.querySelectorAll('button:not([disabled]), input:not([disabled]), a[href], [tabindex]:not([tabindex="-1"])');if(0===i.length)return;var o=i[0],l=i[i.length-1];t.shiftKey?document.activeElement===o&&(t.preventDefault(),l.focus()):document.activeElement===l&&(t.preventDefault(),o.focus())}})}();
\ No newline at end of file
+var recoverEmail="";function showRecoverState(e){["recoverInitial","recoverLoading","recoverVerify","recoverResult"].forEach(function(e){var t=document.getElementById(e);t&&t.classList.remove("active")}),document.getElementById(e).classList.add("active")}function openRecover(){document.getElementById("recoverModal").classList.add("active"),showRecoverState("recoverInitial");var e=document.getElementById("recoverError");e&&(e.style.display="none");var t=document.getElementById("recoverVerifyError");t&&(t.style.display="none"),document.getElementById("recoverEmailInput").value="",document.getElementById("recoverCode").value="",recoverEmail="",setTimeout(function(){document.getElementById("recoverEmailInput").focus()},100)}function closeRecover(){document.getElementById("recoverModal").classList.remove("active")}async function submitRecover(){var e=document.getElementById("recoverError"),t=document.getElementById("recoverBtn"),n=document.getElementById("recoverEmailInput").value.trim();if(!n||!/^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(n))return e.textContent="Please enter a valid email address.",void(e.style.display="block");e.style.display="none",t.disabled=!0,showRecoverState("recoverLoading");try{var a=await fetch("/v1/recover",{method:"POST",headers:{"Content-Type":"application/json"},body:JSON.stringify({email:n})}),o=await a.json();if(!a.ok)return showRecoverState("recoverInitial"),e.textContent=o.error||"Something went wrong.",e.style.display="block",void(t.disabled=!1);recoverEmail=n,document.getElementById("recoverEmailDisplay").textContent=n,showRecoverState("recoverVerify"),document.getElementById("recoverCode").focus(),t.disabled=!1}catch(n){showRecoverState("recoverInitial"),e.textContent="Network error. Please try again.",e.style.display="block",t.disabled=!1}}async function submitRecoverVerify(){var e=document.getElementById("recoverVerifyError"),t=document.getElementById("recoverVerifyBtn"),n=document.getElementById("recoverCode").value.trim();if(!n||!/^\d{6}$/.test(n))return e.textContent="Please enter a 6-digit code.",void(e.style.display="block");e.style.display="none",t.disabled=!0;try{var a=await fetch("/v1/recover/verify",{method:"POST",headers:{"Content-Type":"application/json"},body:JSON.stringify({email:recoverEmail,code:n})}),o=await a.json();if(!a.ok)return e.textContent=o.error||"Verification failed.",e.style.display="block",void(t.disabled=!1);if(o.apiKey){document.getElementById("recoveredKeyText").textContent=o.apiKey,showRecoverState("recoverResult");var i=document.querySelector("#recoverResult h2");i&&(i.setAttribute("tabindex","-1"),i.focus())}else e.textContent=o.message||"No key found for this email.",e.style.display="block",t.disabled=!1}catch(n){e.textContent="Network error. Please try again.",e.style.display="block",t.disabled=!1}}function copyRecoveredKey(){doCopy(document.getElementById("recoveredKeyText").textContent,document.getElementById("copyRecoveredBtn"))}function doCopy(e,t){function n(){t.textContent="✓ Copied!",setTimeout(function(){t.textContent="Copy"},2e3)}function a(){t.textContent="Failed",setTimeout(function(){t.textContent="Copy"},2e3)}try{navigator.clipboard&&window.isSecureContext?navigator.clipboard.writeText(e).then(n).catch(function(){fallbackCopy(e,n,a)}):fallbackCopy(e,n,a)}catch(e){a()}}function fallbackCopy(e,t,n){try{var a=document.createElement("textarea");a.value=e,a.style.position="fixed",a.style.opacity="0",a.style.top="-9999px",document.body.appendChild(a),a.focus(),a.select();var o=document.execCommand("copy");document.body.removeChild(a),o?t():n()}catch(e){n()}}async function checkout(){try{var e=await fetch("/v1/billing/checkout",{method:"POST"}),t=await e.json();t.url?window.location.href=t.url:alert("Checkout is not available yet. Please try again later.")}catch(e){alert("Something went wrong. Please try again.")}}async function generateDemo(){var e=document.getElementById("demoGenerateBtn"),t=document.getElementById("demoStatus"),n=document.getElementById("demoResult"),a=document.getElementById("demoError"),o=document.getElementById("demoHtml").value.trim();if(!o)return a.textContent="Please enter some HTML.",a.style.display="block",void(n.style.display="none");a.style.display="none",n.style.display="none",e.disabled=!0,t.textContent="Generating PDF…";try{var i=await fetch("/v1/demo/html",{method:"POST",headers:{"Content-Type":"application/json"},body:JSON.stringify({html:o})});if(!i.ok){var l=await i.json();return a.textContent=l.error||"Something went wrong.",a.style.display="block",e.disabled=!1,void(t.textContent="")}var r=await i.blob(),c=URL.createObjectURL(r);document.getElementById("demoDownload").href=c,n.style.display="block",t.textContent="",e.disabled=!1}catch(n){a.textContent="Network error. Please try again.",a.style.display="block",e.disabled=!1,t.textContent=""}}document.addEventListener("DOMContentLoaded",function(){"#change-email"===window.location.hash&&openEmailChange(),document.getElementById("demoGenerateBtn").addEventListener("click",generateDemo),document.getElementById("btn-checkout").addEventListener("click",checkout);var e=document.getElementById("btn-checkout-hero");e&&e.addEventListener("click",checkout),document.getElementById("btn-close-recover").addEventListener("click",closeRecover),document.getElementById("recoverBtn").addEventListener("click",submitRecover),document.getElementById("recoverVerifyBtn").addEventListener("click",submitRecoverVerify),document.getElementById("copyRecoveredBtn").addEventListener("click",copyRecoveredKey),document.getElementById("recoverModal").addEventListener("click",function(e){e.target===this&&closeRecover()}),document.querySelectorAll(".open-recover").forEach(function(e){e.addEventListener("click",function(e){e.preventDefault(),openRecover()})}),document.querySelectorAll('a[href^="#"]').forEach(function(e){e.addEventListener("click",function(e){var t=this.getAttribute("href");if("#"!==t){e.preventDefault();var n=document.querySelector(t);n&&n.scrollIntoView({behavior:"smooth"})}})})});var emailChangeApiKey="",emailChangeNewEmail="";function showEmailChangeState(e){["emailChangeInitial","emailChangeLoading","emailChangeVerify","emailChangeResult"].forEach(function(e){var t=document.getElementById(e);t&&t.classList.remove("active")}),document.getElementById(e).classList.add("active")}function openEmailChange(){closeRecover(),document.getElementById("emailChangeModal").classList.add("active"),showEmailChangeState("emailChangeInitial");var e=document.getElementById("emailChangeError");e&&(e.style.display="none");var t=document.getElementById("emailChangeVerifyError");t&&(t.style.display="none"),document.getElementById("emailChangeApiKey").value="",document.getElementById("emailChangeNewEmail").value="",document.getElementById("emailChangeCode").value="",emailChangeApiKey="",emailChangeNewEmail=""}function closeEmailChange(){document.getElementById("emailChangeModal").classList.remove("active")}async function submitEmailChange(){var e=document.getElementById("emailChangeError"),t=document.getElementById("emailChangeBtn"),n=document.getElementById("emailChangeApiKey").value.trim(),a=document.getElementById("emailChangeNewEmail").value.trim();if(!n)return e.textContent="Please enter your API key.",void(e.style.display="block");if(!a||!/^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(a))return e.textContent="Please enter a valid email address.",void(e.style.display="block");e.style.display="none",t.disabled=!0,showEmailChangeState("emailChangeLoading");try{var o=await fetch("/v1/email-change",{method:"POST",headers:{"Content-Type":"application/json"},body:JSON.stringify({apiKey:n,newEmail:a})}),i=await o.json();if(!o.ok)return showEmailChangeState("emailChangeInitial"),e.textContent=i.error||"Something went wrong.",e.style.display="block",void(t.disabled=!1);emailChangeApiKey=n,emailChangeNewEmail=a,document.getElementById("emailChangeEmailDisplay").textContent=a,showEmailChangeState("emailChangeVerify"),document.getElementById("emailChangeCode").focus(),t.disabled=!1}catch(n){showEmailChangeState("emailChangeInitial"),e.textContent="Network error. Please try again.",e.style.display="block",t.disabled=!1}}async function submitEmailChangeVerify(){var e=document.getElementById("emailChangeVerifyError"),t=document.getElementById("emailChangeVerifyBtn"),n=document.getElementById("emailChangeCode").value.trim();if(!n||!/^\d{6}$/.test(n))return e.textContent="Please enter a 6-digit code.",void(e.style.display="block");e.style.display="none",t.disabled=!0;try{var a=await fetch("/v1/email-change/verify",{method:"POST",headers:{"Content-Type":"application/json"},body:JSON.stringify({apiKey:emailChangeApiKey,newEmail:emailChangeNewEmail,code:n})}),o=await a.json();if(!a.ok)return e.textContent=o.error||"Verification failed.",e.style.display="block",void(t.disabled=!1);document.getElementById("emailChangeNewDisplay").textContent=o.newEmail||emailChangeNewEmail,showEmailChangeState("emailChangeResult");var i=document.querySelector("#emailChangeResult h2");i&&(i.setAttribute("tabindex","-1"),i.focus())}catch(n){e.textContent="Network error. Please try again.",e.style.display="block",t.disabled=!1}}document.addEventListener("DOMContentLoaded",function(){var e=document.getElementById("btn-close-email-change");e&&e.addEventListener("click",closeEmailChange);var t=document.getElementById("emailChangeBtn");t&&t.addEventListener("click",submitEmailChange);var n=document.getElementById("emailChangeVerifyBtn");n&&n.addEventListener("click",submitEmailChangeVerify);var a=document.getElementById("emailChangeModal");a&&a.addEventListener("click",function(e){e.target===this&&closeEmailChange()}),document.querySelectorAll(".open-email-change").forEach(function(e){e.addEventListener("click",function(e){e.preventDefault(),openEmailChange()})})}),function(){function e(){for(var e=["recoverModal","emailChangeModal"],t=0;t<e.length;t++){var n=document.getElementById(e[t]);if(n&&n.classList.contains("active"))return n}return null}document.addEventListener("keydown",function(t){var n;if("Escape"===t.key&&((n=e())&&n.classList.remove("active")),"Tab"===t.key){var a=e();if(!a)return;var o=a.querySelectorAll('button:not([disabled]), input:not([disabled]), a[href], [tabindex]:not([tabindex="-1"])');if(0===o.length)return;var i=o[0],l=o[o.length-1];t.shiftKey?document.activeElement===i&&(t.preventDefault(),l.focus()):document.activeElement===l&&(t.preventDefault(),i.focus())}})}();
\ No newline at end of file
diff --git a/public/index.html b/public/index.html
index def44a9..2e193fe 100644
--- a/public/index.html
+++ b/public/index.html
@@ -16,10 +16,10 @@
 <meta name="twitter:image" content="https://docfast.dev/og-image.png">
 <link rel="canonical" href="https://docfast.dev/">
 <script type="application/ld+json">
-{"@context":"https://schema.org","@type":"SoftwareApplication","name":"DocFast","url":"https://docfast.dev","applicationCategory":"DeveloperApplication","operatingSystem":"Web","description":"Convert HTML and Markdown to beautiful PDFs with a simple API call. Fast, reliable, developer-friendly.","offers":[{"@type":"Offer","price":"0","priceCurrency":"EUR","name":"Free","description":"100 PDFs/month"},{"@type":"Offer","price":"9","priceCurrency":"EUR","name":"Pro","description":"5,000 PDFs/month","billingIncrement":"P1M"}]}
+{"@context":"https://schema.org","@type":"SoftwareApplication","name":"DocFast","url":"https://docfast.dev","applicationCategory":"DeveloperApplication","operatingSystem":"Web","description":"Convert HTML and Markdown to beautiful PDFs with a simple API call. Fast, reliable, developer-friendly.","offers":[{"@type":"Offer","price":"9","priceCurrency":"EUR","name":"Pro","description":"5,000 PDFs/month","billingIncrement":"P1M"}]}
 </script>
 <script type="application/ld+json">
-{"@context":"https://schema.org","@type":"WebApplication","name":"DocFast","url":"https://docfast.dev","browserRequirements":"Requires JavaScript. Requires HTML5.","applicationCategory":"DeveloperApplication","operatingSystem":"All","offers":[{"@type":"Offer","price":"0","priceCurrency":"EUR","name":"Free Tier","description":"100 PDFs per month, all endpoints included"},{"@type":"Offer","price":"9","priceCurrency":"EUR","name":"Pro","description":"5,000 PDFs per month, priority support","billingIncrement":"P1M"}]}
+{"@context":"https://schema.org","@type":"WebApplication","name":"DocFast","url":"https://docfast.dev","browserRequirements":"Requires JavaScript. Requires HTML5.","applicationCategory":"DeveloperApplication","operatingSystem":"All","offers":[{"@type":"Offer","price":"9","priceCurrency":"EUR","name":"Pro","description":"5,000 PDFs per month, priority support","billingIncrement":"P1M"}]}
 </script>
 <link rel="icon" href="data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'><text y='.9em' font-size='90'>⚡</text></svg>">
 <style>
@@ -262,6 +262,10 @@ html, body {
 #emailChangeResult.active { display: block; }
 #emailChangeVerify.active { display: block; }
 
+/* Demo playground */
+.demo-playground { padding: 80px 0; }
+.demo-playground textarea:focus { outline: 2px solid var(--accent); outline-offset: -2px; }
+
 /* Focus-visible for accessibility */
 .btn:focus-visible, a:focus-visible, input:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
 /* Skip to content */
@@ -293,10 +297,10 @@ html, body {
     <h1>HTML to <span class="gradient">PDF</span><br>in one API call</h1>
     <p>Convert HTML, Markdown, or URLs to pixel-perfect PDFs. Built-in templates for invoices &amp; receipts. No headless browser headaches.</p>
     <div class="hero-actions">
-      <button class="btn btn-primary" id="btn-signup" aria-label="Get free API key">Get Free API Key →</button>
-      <a href="/docs" class="btn btn-secondary">Read the Docs</a>
+      <a href="#demo" class="btn btn-primary" id="btn-try-demo">Try Demo →</a>
+      <button class="btn btn-secondary" id="btn-checkout-hero" aria-label="Get Pro API key">Get Pro API Key — €9/mo</button>
     </div>
-    <p style="margin-top:16px;color:var(--muted);font-size:0.9rem;">Already have an account? <a href="#" class="open-recover" style="color:var(--accent);">Lost your API key? Recover it →</a></p>
+    <p style="margin-top:16px;color:var(--muted);font-size:0.9rem;">No signup needed for demo • <a href="#" class="open-recover" style="color:var(--accent);">Lost your API key? Recover it →</a></p>
 
     <div class="code-section">
       <div class="code-header">
@@ -392,28 +396,29 @@ html, body {
 <section class="pricing" id="pricing">
   <div class="container">
     <h2 class="section-title">Simple, transparent pricing</h2>
-    <p class="section-sub">Start free. Upgrade when you're ready. No surprise charges.</p>
-    <div class="pricing-grid">
+    <p class="section-sub">Try instantly with the demo. Go Pro when you're ready.</p>
+    <div class="pricing-grid" style="grid-template-columns:1fr 1fr;max-width:700px;">
       <div class="price-card">
-        <div class="price-name">Free</div>
-        <div class="price-amount">€0<span> /mo</span></div>
-        <div class="price-desc">Perfect for side projects and testing</div>
+        <div class="price-name">Demo</div>
+        <div class="price-amount" style="font-size:2rem;">Free<span></span></div>
+        <div class="price-desc">Try it out — no signup needed</div>
         <ul class="price-features">
-          <li>100 PDFs per month</li>
-          <li>All conversion endpoints</li>
-          <li>All templates included</li>
-          <li>Rate limiting: 10 req/min</li>
+          <li>5 PDFs per hour</li>
+          <li>HTML &amp; Markdown to PDF</li>
+          <li>Watermarked output</li>
+          <li>No API key required</li>
         </ul>
-        <button class="btn btn-secondary" style="width:100%" id="btn-signup-2" aria-label="Get free API key">Get Free API Key</button>
+        <a href="#demo" class="btn btn-secondary" style="width:100%">Try Demo ↓</a>
       </div>
       <div class="price-card featured">
         <div class="price-name">Pro</div>
         <div class="price-amount">€9<span> /mo</span></div>
         <div class="price-desc">For production apps and businesses</div>
         <ul class="price-features">
-<li>5,000 PDFs per month</li>
+          <li>5,000 PDFs per month</li>
           <li>All conversion endpoints</li>
           <li>All templates included</li>
+          <li>Clean PDFs — no watermark</li>
           <li>Priority support (<a href="mailto:support@docfast.dev">support@docfast.dev</a>)</li>
         </ul>
         <button class="btn btn-primary" style="width:100%" id="btn-checkout" aria-label="Get started with Pro plan">Get Started →</button>
@@ -422,6 +427,36 @@ html, body {
   </div>
 </section>
 
+<section class="demo-playground" id="demo">
+  <div class="container">
+    <h2 class="section-title">Try it now</h2>
+    <p class="section-sub">Generate a PDF right here — no signup, no API key. 5 free demos per hour.</p>
+    <div style="max-width:700px;margin:0 auto;">
+      <div class="code-header">
+        <div class="code-dots" aria-hidden="true"><span></span><span></span><span></span></div>
+        <span class="code-label">HTML → PDF playground</span>
+      </div>
+      <textarea id="demoHtml" aria-label="HTML input for demo PDF generation" style="width:100%;min-height:180px;padding:20px;background:var(--card);border:1px solid var(--border);border-top:none;color:var(--fg);font-family:'SF Mono','Fira Code',monospace;font-size:0.85rem;line-height:1.7;resize:vertical;border-radius:0;" spellcheck="false"><h1 style="color:#34d399;font-family:sans-serif;">Hello from DocFast!</h1>
+<p style="font-family:sans-serif;font-size:18px;color:#333;">This is a demo PDF generated via the DocFast API.</p>
+<ul style="font-family:sans-serif;color:#555;">
+  <li>HTML &amp; Markdown to PDF</li>
+  <li>Sub-second generation</li>
+  <li>EU hosted, GDPR compliant</li>
+</ul></textarea>
+      <div style="display:flex;gap:12px;align-items:center;margin-top:16px;flex-wrap:wrap;">
+        <button class="btn btn-primary" id="demoGenerateBtn" aria-label="Generate demo PDF">Generate PDF →</button>
+        <span id="demoStatus" style="color:var(--muted);font-size:0.85rem;"></span>
+      </div>
+      <div id="demoResult" style="display:none;margin-top:16px;padding:16px;background:var(--card);border:1px solid var(--accent);border-radius:var(--radius);text-align:center;">
+        <p style="margin-bottom:12px;color:var(--fg);">✅ PDF generated!</p>
+        <a id="demoDownload" href="#" download="demo.pdf" class="btn btn-primary" style="display:inline-flex;">Download PDF ↓</a>
+        <p style="margin-top:12px;color:var(--muted);font-size:0.8rem;">Demo PDFs include a small watermark. <a href="#pricing">Upgrade to Pro</a> for clean output.</p>
+      </div>
+      <div id="demoError" style="display:none;margin-top:16px;padding:14px;background:rgba(248,113,113,0.06);border:1px solid rgba(248,113,113,0.15);border-radius:var(--radius);color:#f87171;font-size:0.9rem;"></div>
+    </div>
+  </div>
+</section>
+
 </main>
 
 <footer aria-label="Footer">
@@ -439,50 +474,6 @@ html, body {
   </div>
 </footer>
 
-<!-- Signup Modal -->
-<div class="modal-overlay" id="signupModal" role="dialog" aria-modal="true" aria-label="Sign up for API key">
-  <div class="modal">
-    <button class="close" id="btn-close-signup" aria-label="Close dialog">&times;</button>
-
-    <div id="signupInitial" class="active">
-      <h2>Get your free API key</h2>
-      <p>Enter your email to get started. No credit card required.</p>
-      <div class="signup-error" id="signupError"></div>
-      <input type="email" id="signupEmail" aria-label="Email address" placeholder="your.email@example.com" style="width:100%;padding:12px;border:1px solid var(--border);background:var(--bg);color:var(--fg);border-radius:8px;font-size:0.9rem;margin-bottom:16px;" required>
-      <button class="btn btn-primary" style="width:100%" id="signupBtn" aria-label="Generate API key">Generate API Key →</button>
-      <p style="margin-top:16px;color:var(--muted);font-size:0.8rem;text-align:center;">100 free PDFs/month • All endpoints included<br><a href="#" class="open-recover" style="color:var(--muted)">Lost your API key? Recover it →</a></p>
-    </div>
-
-    <div id="signupLoading">
-      <div class="spinner"></div>
-      <p style="color:var(--muted);margin:0">Generating your API key…</p>
-    </div>
-
-    <div id="signupVerify">
-      <h2>Enter verification code</h2>
-      <p>We sent a 6-digit code to <strong id="verifyEmailDisplay"></strong></p>
-      <div class="signup-error" id="verifyError"></div>
-      <input type="text" id="verifyCode" aria-label="Verification code" placeholder="123456" maxlength="6" pattern="[0-9]{6}" inputmode="numeric" style="width:100%;padding:14px;border:1px solid var(--border);background:var(--bg);color:var(--fg);border-radius:8px;font-size:1.4rem;letter-spacing:0.3em;text-align:center;margin-bottom:16px;font-family:monospace;" required>
-      <button class="btn btn-primary" style="width:100%" id="verifyBtn" aria-label="Verify code">Verify →</button>
-      <p style="margin-top:16px;color:var(--muted);font-size:0.8rem;text-align:center;">Code expires in 15 minutes</p>
-    </div>
-
-    <div id="signupResult" aria-live="polite">
-      <h2>🚀 Your API key is ready!</h2>
-      <div class="warning-box">
-        <span class="icon">⚠️</span>
-        <span>Save your API key securely. Lost it? <a href="#" class="open-recover" style="color:#fbbf24">Recover via email</a></span>
-      </div>
-      <div style="background:var(--bg);border:1px solid var(--accent);border-radius:8px;padding:14px;font-family:monospace;font-size:0.82rem;word-break:break-all;margin:16px 0;position:relative;">
-        <span id="apiKeyText"></span>
-        <button onclick="copyKey()" id="copyBtn" aria-label="Copy API key" style="position:absolute;top:8px;right:8px;background:var(--accent);color:var(--bg);border:none;border-radius:4px;padding:4px 12px;cursor:pointer;font-size:0.8rem;">Copy</button>
-      </div>
-      <p style="margin-top:20px;color:var(--muted);font-size:0.9rem;">100 free PDFs/month • <a href="/docs">Read the docs →</a></p>
-    </div>
-  </div>
-</div>
-
-
 <!-- Recovery Modal -->
 <div class="modal-overlay" id="recoverModal" role="dialog" aria-modal="true" aria-label="Recover API key">
   <div class="modal">
diff --git a/src/index.ts b/src/index.ts
index 2768a5a..284c94b 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -13,7 +13,7 @@ import rateLimit from "express-rate-limit";
 import { convertRouter } from "./routes/convert.js";
 import { templatesRouter } from "./routes/templates.js";
 import { healthRouter } from "./routes/health.js";
-import { signupRouter } from "./routes/signup.js";
+import { demoRouter } from "./routes/demo.js";
 import { recoverRouter } from "./routes/recover.js";
 import { billingRouter } from "./routes/billing.js";
 import { authMiddleware } from "./middleware/auth.js";
@@ -58,7 +58,8 @@ app.use(compressionMiddleware);
 app.use((req, res, next) => {
   const isAuthBillingRoute = req.path.startsWith('/v1/signup') || 
                              req.path.startsWith('/v1/recover') || 
-                             req.path.startsWith('/v1/billing');
+                             req.path.startsWith('/v1/billing') ||
+                             req.path.startsWith('/v1/demo');
   
   if (isAuthBillingRoute) {
     res.setHeader("Access-Control-Allow-Origin", "https://docfast.dev");
@@ -96,7 +97,14 @@ app.use(limiter);
 
 // Public routes
 app.use("/health", healthRouter);
-app.use("/v1/signup", signupRouter);
+app.use("/v1/demo", express.json({ limit: "50kb" }), pdfRateLimitMiddleware, demoRouter);
+app.use("/v1/signup", (_req, res) => {
+  res.status(410).json({
+    error: "Free accounts have been discontinued. Try our demo at POST /v1/demo/html or upgrade to Pro at https://docfast.dev",
+    demo_endpoint: "/v1/demo/html",
+    pro_url: "https://docfast.dev/#pricing"
+  });
+});
 app.use("/v1/recover", recoverRouter);
 app.use("/v1/billing", billingRouter);
 
@@ -173,7 +181,7 @@ p{color:#7a8194;margin-bottom:24px;line-height:1.6}
 ${apiKey ? `
 <div class="warning">⚠️ Save your API key securely. You can recover it via email if needed.</div>
 <div class="key-box" onclick="navigator.clipboard.writeText('${apiKey}');this.style.borderColor='#5eead4';setTimeout(()=>this.style.borderColor='#34d399',1500)">${apiKey}</div>
-<div class="links">100 free PDFs/month · <a href="/docs">Read the docs →</a></div>
+<div class="links">Upgrade to Pro for 5,000 PDFs/month · <a href="/docs">Read the docs →</a></div>
 ` : `<div class="links"><a href="/">← Back to DocFast</a></div>`}
 </div></body></html>`;
 }
@@ -241,10 +249,11 @@ app.get("/api", (_req, res) => {
     name: "DocFast API",
     version: APP_VERSION,
     endpoints: [
-      "POST /v1/signup/free — Get a free API key",
-      "POST /v1/convert/html",
-      "POST /v1/convert/markdown",
-      "POST /v1/convert/url",
+      "POST /v1/demo/html — Try HTML→PDF (no auth, watermarked, 5/hour)",
+      "POST /v1/demo/markdown — Try Markdown→PDF (no auth, watermarked, 5/hour)",
+      "POST /v1/convert/html — HTML→PDF (requires API key)",
+      "POST /v1/convert/markdown — Markdown→PDF (requires API key)",
+      "POST /v1/convert/url — URL→PDF (requires API key)",
       "POST /v1/templates/:id/render",
       "GET  /v1/templates",
       "POST /v1/billing/checkout — Start Pro subscription",
diff --git a/src/routes/demo.ts b/src/routes/demo.ts
new file mode 100644
index 0000000..9551f94
--- /dev/null
+++ b/src/routes/demo.ts
@@ -0,0 +1,146 @@
+import { Router, Request, Response } from "express";
+import rateLimit from "express-rate-limit";
+import { renderPdf } from "../services/browser.js";
+import { markdownToHtml, wrapHtml } from "../services/markdown.js";
+import logger from "../services/logger.js";
+
+const router = Router();
+
+const WATERMARK_HTML = `<div style="position:fixed;bottom:0;left:0;right:0;background:rgba(52,211,153,0.92);color:#0b0d11;text-align:center;padding:8px;font-family:sans-serif;font-size:12px;font-weight:bold;z-index:999999;letter-spacing:0.3px;">Generated by DocFast — docfast.dev | Upgrade to Pro for clean PDFs</div>`;
+
+function injectWatermark(html: string): string {
+  if (html.includes("</body>")) {
+    return html.replace("</body>", WATERMARK_HTML + "</body>");
+  }
+  return html + WATERMARK_HTML;
+}
+
+// 5 requests per hour per IP
+const demoLimiter = rateLimit({
+  windowMs: 60 * 60 * 1000,
+  max: 5,
+  message: { error: "Demo limit reached (5/hour). Get a Pro API key at https://docfast.dev for unlimited access." },
+  standardHeaders: true,
+  legacyHeaders: false,
+  keyGenerator: (req) => req.ip || req.socket.remoteAddress || "unknown",
+});
+
+router.use(demoLimiter);
+
+interface DemoBody {
+  html?: string;
+  markdown?: string;
+  css?: string;
+  format?: string;
+  landscape?: boolean;
+  margin?: { top?: string; right?: string; bottom?: string; left?: string };
+  printBackground?: boolean;
+  filename?: string;
+}
+
+function sanitizeFilename(name: string): string {
+  return name.replace(/[\x00-\x1f"\\\r\n]/g, "").trim() || "document.pdf";
+}
+
+// POST /v1/demo/html
+router.post("/html", async (req: Request & { acquirePdfSlot?: () => Promise<void>; releasePdfSlot?: () => void }, res: Response) => {
+  let slotAcquired = false;
+  try {
+    const ct = req.headers["content-type"] || "";
+    if (!ct.includes("application/json")) {
+      res.status(415).json({ error: "Unsupported Content-Type. Use application/json." });
+      return;
+    }
+
+    const body: DemoBody = typeof req.body === "string" ? { html: req.body } : req.body;
+    if (!body.html) {
+      res.status(400).json({ error: "Missing 'html' field" });
+      return;
+    }
+
+    if (req.acquirePdfSlot) {
+      await req.acquirePdfSlot();
+      slotAcquired = true;
+    }
+
+    const fullHtml = body.html.includes("<html")
+      ? injectWatermark(body.html)
+      : injectWatermark(wrapHtml(body.html, body.css));
+
+    const pdf = await renderPdf(fullHtml, {
+      format: body.format || "A4",
+      landscape: body.landscape || false,
+      printBackground: body.printBackground !== false,
+      margin: body.margin || { top: "0", right: "0", bottom: "0", left: "0" },
+    });
+
+    const filename = sanitizeFilename(body.filename || "demo.pdf");
+    res.setHeader("Content-Type", "application/pdf");
+    res.setHeader("Content-Disposition", `attachment; filename="${filename}"`);
+    res.setHeader("Content-Length", pdf.length);
+    res.send(pdf);
+  } catch (err: any) {
+    if (err.message === "QUEUE_FULL") {
+      res.status(503).json({ error: "Server busy. Please try again in a moment." });
+    } else if (err.message === "PDF_TIMEOUT") {
+      res.status(504).json({ error: "PDF generation timed out." });
+    } else {
+      logger.error({ err }, "Demo HTML conversion failed");
+      res.status(500).json({ error: "PDF generation failed." });
+    }
+  } finally {
+    if (slotAcquired && req.releasePdfSlot) req.releasePdfSlot();
+  }
+});
+
+// POST /v1/demo/markdown
+router.post("/markdown", async (req: Request & { acquirePdfSlot?: () => Promise<void>; releasePdfSlot?: () => void }, res: Response) => {
+  let slotAcquired = false;
+  try {
+    const ct = req.headers["content-type"] || "";
+    if (!ct.includes("application/json")) {
+      res.status(415).json({ error: "Unsupported Content-Type. Use application/json." });
+      return;
+    }
+
+    const body: DemoBody = typeof req.body === "string" ? { markdown: req.body } : req.body;
+    if (!body.markdown) {
+      res.status(400).json({ error: "Missing 'markdown' field" });
+      return;
+    }
+
+    if (req.acquirePdfSlot) {
+      await req.acquirePdfSlot();
+      slotAcquired = true;
+    }
+
+    const htmlContent = markdownToHtml(body.markdown);
+    const fullHtml = injectWatermark(wrapHtml(htmlContent, body.css));
+
+    const pdf = await renderPdf(fullHtml, {
+      format: body.format || "A4",
+      landscape: body.landscape || false,
+      printBackground: body.printBackground !== false,
+      margin: body.margin || { top: "0", right: "0", bottom: "0", left: "0" },
+    });
+
+    const filename = sanitizeFilename(body.filename || "demo.pdf");
+    res.setHeader("Content-Type", "application/pdf");
+    res.setHeader("Content-Disposition", `attachment; filename="${filename}"`);
+    res.setHeader("Content-Length", pdf.length);
+    res.send(pdf);
+  } catch (err: any) {
+    if (err.message === "QUEUE_FULL") {
+      res.status(503).json({ error: "Server busy. Please try again in a moment." });
+    } else if (err.message === "PDF_TIMEOUT") {
+      res.status(504).json({ error: "PDF generation timed out." });
+    } else {
+      logger.error({ err }, "Demo markdown conversion failed");
+      res.status(500).json({ error: "PDF generation failed." });
+    }
+  } finally {
+    if (slotAcquired && req.releasePdfSlot) req.releasePdfSlot();
+  }
+});
+
+export { router as demoRouter };