How do I use the On-Page SEO Checker?

Choose URL mode when the target site allows browser fetch access, or switch to HTML mode and paste the raw markup directly. Run the audit to measure title length, meta description length, H1 count, image alt coverage, link totals, and approximate word count. Review the 0-100 score first, then check each category card for the sections that passed or failed. Use the checklist details to spot issues such as missing titles, weak descriptions, multiple H1 tags, missing alt text, or thin content. After fixing the page, run the audit again to compare improvements before publishing or updating the live page.

Is the On-Page SEO Checker free?

Yes, the On-Page SEO Checker is completely free. It runs entirely in your browser with no signup, no download, and no data sent to any server.

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On-Page SEO Checker

Audit title tags, meta descriptions, H1 usage, image alt text, links, and content signals from a URL or pasted HTML.

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Client-side SEO audit

Check on-page SEO basics

Analyze a live URL when the site allows browser fetch access, or paste raw HTML for a direct audit with no upload.

Page URL

Choose URL mode or HTML mode, then run the checker.

SEO score

Run an audit to score the page.

Title length

Recommended 30-60 characters

Word count

Aim for enough useful body content

Core metrics

Title, meta, headings, images, links, content

Category checklist

Score by section

How to use

How to audit titles, descriptions, headings, images, links, and body copy with an on-page SEO checker

1 Choose URL mode when the target site allows browser fetch access, or switch to HTML mode and paste the raw markup directly.
2 Run the audit to measure title length, meta description length, H1 count, image alt coverage, link totals, and approximate word count.
3 Review the 0-100 score first, then check each category card for the sections that passed or failed.
4 Use the checklist details to spot issues such as missing titles, weak descriptions, multiple H1 tags, missing alt text, or thin content.
5 After fixing the page, run the audit again to compare improvements before publishing or updating the live page.

On-page SEO checks are useful because many ranking and click-through issues come from page structure rather than backlinks or technical infrastructure. A title that is too short, a missing description, multiple H1 tags, or empty image alt attributes can all weaken how clearly a page communicates its purpose to search engines and users.

A browser-based checker is especially practical during drafting, QA, and content refresh work. If a site blocks direct fetch access, pasting raw HTML still gives you a quick way to review the markup before deployment. That makes the tool helpful for marketers, editors, developers, and anyone maintaining landing pages, blog posts, or documentation.

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