diff --git a/devterm/templates/base.html b/devterm/templates/base.html
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+++ b/devterm/templates/base.html
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+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Devterm - Developer Utilities</title>
+    <style>
+        * { margin: 0; padding: 0; box-sizing: border-box; }
+        body {
+            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
+            background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
+            min-height: 100vh;
+            color: #fff;
+        }
+        .container { max-width: 1200px; margin: 0 auto; padding: 2rem; }
+        header {
+            text-align: center;
+            padding: 2rem 0;
+            border-bottom: 1px solid rgba(255,255,255,0.1);
+            margin-bottom: 2rem;
+        }
+        h1 {
+            font-size: 2.5rem;
+            background: linear-gradient(90deg, #00d4ff, #7c3aed);
+            -webkit-background-clip: text;
+            -webkit-text-fill-color: transparent;
+            margin-bottom: 0.5rem;
+        }
+        .subtitle { color: #94a3b8; }
+        .tools-grid {
+            display: grid;
+            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
+            gap: 1.5rem;
+            padding: 1rem 0;
+        }
+        .tool-card {
+            background: rgba(255,255,255,0.05);
+            border: 1px solid rgba(255,255,255,0.1);
+            border-radius: 12px;
+            padding: 1.5rem;
+            text-decoration: none;
+            color: inherit;
+            transition: all 0.3s ease;
+        }
+        .tool-card:hover {
+            transform: translateY(-5px);
+            background: rgba(255,255,255,0.1);
+            border-color: #00d4ff;
+        }
+        .tool-card h3 { margin-bottom: 0.5rem; color: #00d4ff; }
+        .tool-card p { color: #94a3b8; font-size: 0.9rem; }
+    </style>
+</head>
+<body>
+    <div class="container">
+        <header>
+            <h1>Devterm</h1>
+            <p class="subtitle">Developer Utilities Suite</p>
+        </header>
+        <div class="tools-grid">
+            <a href="/json" class="tool-card">
+                <h3>JSON Formatter</h3>
+                <p>Format and validate JSON data</p>
+            </a>
+            <a href="/jwt" class="tool-card">
+                <h3>JWT Decoder</h3>
+                <p>Decode and inspect JWT tokens</p>
+            </a>
+            <a href="/cron" class="tool-card">
+                <h3>Cron Validator</h3>
+                <p>Validate cron expressions</p>
+            </a>
+            <a href="/base64" class="tool-card">
+                <h3>Base64 Tool</h3>
+                <p>Encode and decode Base64</p>
+            </a>
+            <a href="/url" class="tool-card">
+                <h3>URL Encoder</h3>
+                <p>Encode and decode URLs</p>
+            </a>
+        </div>
+    </div>
+</body>
+</html>
