SEO improvements: JSON-LD structured data, OG/Twitter meta tags, canonical URLs, updated sitemap

Author: mellowmarshall

index.html

@@ -9,6 +9,55 @@
 <meta property="og:title" content="DevToolbox — Free Online Developer Utilities">
 <meta property="og:description" content="20+ free developer tools in your browser. No signup, no tracking, no ads.">
 <meta property="og:type" content="website">
+<meta property="og:url" content="https://mellowmarshall.github.io/devtoolbox/">
+<meta property="og:image" content="https://mellowmarshall.github.io/devtoolbox/og-image.png">
+<meta name="twitter:card" content="summary_large_image">
+<meta name="twitter:title" content="DevToolbox — Free Online Developer Utilities">
+<meta name="twitter:description" content="20+ free developer tools in your browser. No signup, no tracking, no ads.">
+<link rel="canonical" href="https://mellowmarshall.github.io/devtoolbox/">
+<script type="application/ld+json">
+{
+  "@context": "https://schema.org",
+  "@type": "WebApplication",
+  "name": "DevToolbox",
+  "url": "https://mellowmarshall.github.io/devtoolbox/",
+  "description": "20+ free online developer tools: JSON formatter, Base64 encoder, UUID generator, regex tester, JWT decoder, and more. No signup, no tracking.",
+  "applicationCategory": "DeveloperApplication",
+  "operatingSystem": "Web Browser",
+  "offers": {
+    "@type": "Offer",
+    "price": "0",
+    "priceCurrency": "USD"
+  },
+  "author": {
+    "@type": "Organization",
+    "name": "DevTools Market",
+    "url": "https://devtoolsmarket.gumroad.com"
+  },
+  "featureList": [
+    "JSON Formatter & Validator",
+    "Base64 Encoder/Decoder",
+    "UUID Generator",
+    "Hash Generator (MD5, SHA-256)",
+    "JWT Decoder",
+    "Regex Tester",
+    "Color Converter",
+    "Unix Timestamp Converter",
+    "URL Encoder/Decoder",
+    "Lorem Ipsum Generator",
+    "Markdown Preview",
+    "CSS Minifier",
+    "HTML Entity Encoder",
+    "Number Base Converter",
+    "Cron Expression Parser",
+    "YAML to JSON Converter",
+    "Diff Checker",
+    "String Case Converter",
+    "QR Code Generator",
+    "Password Generator"
+  ]
+}
+</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>">
 <script src="https://gumroad.com/js/gumroad.js"></script>
 <style>

sitemap.xml

@@ -10,6 +10,6 @@
     <loc>https://mellowmarshall.github.io/devtoolbox/store.html</loc>
     <lastmod>2026-03-20</lastmod>
     <changefreq>weekly</changefreq>
-    <priority>0.8</priority>
+    <priority>0.9</priority>
   </url>
 </urlset>

store.html

@@ -9,6 +9,36 @@
 <meta property="og:title" content="DevToolbox Store — Premium Developer Resources">
 <meta property="og:description" content="Battle-tested cheatsheets and tools for professional developers. From $3.">
 <meta property="og:type" content="website">
+<meta property="og:url" content="https://mellowmarshall.github.io/devtoolbox/store.html">
+<meta name="twitter:card" content="summary_large_image">
+<meta name="twitter:title" content="DevToolbox Store — Premium Developer Resources">
+<meta name="twitter:description" content="Battle-tested cheatsheets and tools for professional developers. From $3.">
+<link rel="canonical" href="https://mellowmarshall.github.io/devtoolbox/store.html">
+<script type="application/ld+json">
+{
+  "@context": "https://schema.org",
+  "@type": "CollectionPage",
+  "name": "DevToolbox Store",
+  "description": "Premium developer cheatsheets, prompt packs, and productivity tools. Instant PDF download.",
+  "url": "https://mellowmarshall.github.io/devtoolbox/store.html",
+  "mainEntity": {
+    "@type": "ItemList",
+    "numberOfItems": 10,
+    "itemListElement": [
+      {"@type": "Product", "name": "Prompt Engineering Mega Pack", "offers": {"@type": "Offer", "price": "4.99", "priceCurrency": "USD"}},
+      {"@type": "Product", "name": "Git Power User Cheatsheet", "offers": {"@type": "Offer", "price": "3.99", "priceCurrency": "USD"}},
+      {"@type": "Product", "name": "Docker Compose Cheatsheet", "offers": {"@type": "Offer", "price": "2.99", "priceCurrency": "USD"}},
+      {"@type": "Product", "name": "Regex Mastery Cheatsheet", "offers": {"@type": "Offer", "price": "3.99", "priceCurrency": "USD"}},
+      {"@type": "Product", "name": "Linux CLI Essential Reference", "offers": {"@type": "Offer", "price": "4.99", "priceCurrency": "USD"}},
+      {"@type": "Product", "name": "VS Code Productivity Guide", "offers": {"@type": "Offer", "price": "3.99", "priceCurrency": "USD"}},
+      {"@type": "Product", "name": "Shell Scripting Cookbook", "offers": {"@type": "Offer", "price": "4.99", "priceCurrency": "USD"}},
+      {"@type": "Product", "name": "API Design Patterns Guide", "offers": {"@type": "Offer", "price": "4.99", "priceCurrency": "USD"}},
+      {"@type": "Product", "name": "SQL Query Optimization Guide", "offers": {"@type": "Offer", "price": "3.99", "priceCurrency": "USD"}},
+      {"@type": "Product", "name": "Python One-Liners Reference", "offers": {"@type": "Offer", "price": "2.99", "priceCurrency": "USD"}}
+    ]
+  }
+}
+</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>">
 <script src="https://gumroad.com/js/gumroad.js"></script>
 <style>