On-Page SEO Audit
Paste a page's HTML source and get an instant on-page SEO audit — title, meta, headings, canonical, social tags, structured data and image alt coverage. Everything is analyzed in your browser.
🔒 Runs entirely in your browser · nothing is uploaded or stored
✅ What scores well
- Title 30–60 chars
- Meta description 70–160 chars
- Exactly one H1
- Canonical + OG + Twitter tags
- JSON-LD structured data
- Alt text on images
🧠 Why on-page still matters
Even with modern ranking, clean titles, descriptions and structured data drive click-through and rich results. It's the cheapest SEO you'll ever do.
Frequently Asked Questions
Can I just paste a URL instead of HTML?
Because of browser cross-origin rules, a page can't fetch arbitrary external HTML. Use your browser's View Source (Ctrl/Cmd+U) and paste it — or click “Load this page as example” to see it work. Everything stays in your browser.
Does this replace a full SEO crawler?
No — it's a fast on-page checker for a single page. For site-wide crawling, broken links and indexation, pair it with the Broken Link Scanner and Sitemap Validator.
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