diff --git a/website/sass/style.scss b/website/sass/style.scss
index deb1963..47fd654 100644
--- a/website/sass/style.scss
+++ b/website/sass/style.scss
@@ -422,6 +422,31 @@ body:has(.playground-page) footer {
     border-color: var(--accent);
 }
 
+.share-btn {
+    padding: 0.375rem 1rem;
+    background: var(--accent);
+    color: white;
+    border: none;
+    border-radius: 0.25rem;
+    font-size: 0.875rem;
+    font-weight: 500;
+    cursor: pointer;
+    transition: background 0.2s, transform 0.1s;
+}
+
+.share-btn:hover {
+    background: var(--accent-hover);
+    transform: translateY(-1px);
+}
+
+.share-btn:active {
+    transform: translateY(0);
+}
+
+.share-btn.copied {
+    background: #10b981;
+}
+
 .tabs {
     display: flex;
     gap: 0.5rem;
diff --git a/website/static/js/app.js b/website/static/js/app.js
index 2c4359b..9803f04 100644
--- a/website/static/js/app.js
+++ b/website/static/js/app.js
@@ -131,6 +131,9 @@ async function init() {
         initEditor();
         setupEventListeners();
 
+        // Load from URL if share parameter exists
+        loadFromUrl();
+
         // Generate initial output
         handleCheck();
     } catch (error) {
@@ -419,6 +422,12 @@ function setupEventListeners() {
             timeout = setTimeout(handleCheck, 500);
         });
     }
+
+    // Share button
+    const shareBtn = document.getElementById('share-btn');
+    if (shareBtn) {
+        shareBtn.addEventListener('click', handleShare);
+    }
 }
 
 function switchTab(tabName) {
@@ -547,6 +556,68 @@ function showValidateError(message) {
     resultDiv.style.display = 'block';
 }
 
+// Base64url encoding (URL-safe base64)
+function base64urlEncode(str) {
+    // Convert string to base64
+    const base64 = btoa(unescape(encodeURIComponent(str)));
+    // Make it URL-safe by replacing +/= with -_~
+    return base64.replace(/\+/g, '-').replace(/\//g, '_').replace(/=/g, '~');
+}
+
+function base64urlDecode(str) {
+    // Convert URL-safe base64 back to regular base64
+    const base64 = str.replace(/-/g, '+').replace(/_/g, '/').replace(/~/g, '=');
+    // Decode base64 to string
+    return decodeURIComponent(escape(atob(base64)));
+}
+
+function loadFromUrl() {
+    const urlParams = new URLSearchParams(window.location.search);
+    const shareParam = urlParams.get('share');
+
+    if (shareParam) {
+        try {
+            const decoded = base64urlDecode(shareParam);
+            const textarea = document.getElementById('mlf-editor');
+            if (textarea) {
+                textarea.value = decoded;
+                updateLineNumbers(decoded);
+                updateHighlighting(decoded);
+            }
+        } catch (error) {
+            console.error('Failed to load shared code:', error);
+            showError('Failed to load shared code. The link may be corrupted.');
+        }
+    }
+}
+
+function handleShare() {
+    const source = getEditorContent();
+    const encoded = base64urlEncode(source);
+
+    // Build share URL
+    const baseUrl = window.location.origin + window.location.pathname;
+    const shareUrl = `${baseUrl}?share=${encoded}`;
+
+    // Copy to clipboard
+    navigator.clipboard.writeText(shareUrl).then(() => {
+        // Show success feedback
+        const shareBtn = document.getElementById('share-btn');
+        const originalText = shareBtn.textContent;
+        shareBtn.textContent = 'Copied!';
+        shareBtn.classList.add('copied');
+
+        setTimeout(() => {
+            shareBtn.textContent = originalText;
+            shareBtn.classList.remove('copied');
+        }, 2000);
+    }).catch(err => {
+        console.error('Failed to copy to clipboard:', err);
+        // Fallback: show the URL in a prompt
+        prompt('Copy this URL to share:', shareUrl);
+    });
+}
+
 // Initialize when DOM is ready
 if (document.readyState === 'loading') {
     document.addEventListener('DOMContentLoaded', init);
diff --git a/website/templates/playground.html b/website/templates/playground.html
index 4391625..7bcd92f 100644
--- a/website/templates/playground.html
+++ b/website/templates/playground.html
@@ -8,6 +8,7 @@
                 <div class="file-path-container">
                     <input type="text" id="file-path" value="com/example/forum/thread.mlf" spellcheck="false" />
                 </div>
+                <button id="share-btn" class="share-btn" title="Share this code">Share</button>
             </div>
             <textarea id="mlf-editor" spellcheck="false">/// A forum thread
 record thread {