On-Page SEO Analyzer
Paste your page's HTML and get a full on-page SEO check: title length, meta description, headings, image alt text, structured data, and keyword density — all scored instantly in your browser.
How to audit a page's SEO
Copy the HTML source of any page you own, paste it here, and click Analyze. The tool checks title, meta description, H1, H2s, alt text, robots, structured data, and word count.
Each item gets a green check or a red cross with a hint on how to fix it, plus an overall score out of 100.
- Paste your page's HTML
- Click Analyze
- Review the checklist and score
- Fix the red items
What makes a good score
Aim for one H1, a 70–160 character meta description, alt text on every image, and structured data. The keyword density list shows which terms dominate your page.
Frequently Asked Questions
Can this tool check other websites?
No — it analyzes only the HTML you paste, directly in your browser. This keeps it fully private and free.
What is a good SEO score?
80+ is strong. Focus on fixing any red items — especially a missing title, no meta description, or multiple H1 tags.
Is my code sent anywhere?
No. Analysis happens locally; your HTML never leaves your device.