Toolkeel

On-page SEO checker

Check the basics that decide how a page appears in search: paste the page’s source code and get a clear checklist and heading outline.

  • Free
  • Private
  • No sign-up
In your browser, open the page, press Ctrl+U (Cmd+Option+U on Mac), select all and copy. The code is analysed here and not sent anywhere.
Stays on this device. Network requests since you started: 0 How to check this yourself
  1. Your text and dataRead from your device
  2. Worked on in this tabBy code running in your browser
  3. Ready to copyNothing is stored

Never sent to a server. See how to check

How to use it

  1. Copy the HTML source of a page (Ctrl+U, select all, copy).

  2. Paste it and select "Check page".

  3. Fix the items marked ✗ and check again.

About this tool

The checker reads the HTML you paste and reviews the on-page elements search engines rely on: title length, meta description, a single clear H1, a canonical URL, indexing directives, the language attribute, mobile viewport, image alt text, Open Graph tags for social sharing, valid JSON-LD structured data and heading order.

Your HTML is parsed into an inert document in your browser: scripts in it do not run and images are not loaded. The score is a simple count of checks passed. It is a quick health check, not a ranking prediction, since rankings depend mostly on content quality and links.

Good to know

  • Analyses the HTML you paste; it does not fetch pages or measure speed.
  • Pages that build content with JavaScript may show little in their source; copy the rendered HTML from the browser’s developer tools instead.

Frequently asked questions

How do I get a page’s HTML?

Open the page and press Ctrl+U (Windows) or Cmd+Option+U (Mac), then select all and copy.

Why can’t I just enter a URL?

Fetching other sites from a browser is blocked for security, and doing it on our server would mean sending data through us. Pasting keeps the check private.

Is a 100 score enough to rank?

No. It means the on-page basics are in place. Content quality, relevance and links matter most.

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Last updated 2026-10-20 by the Toolkeel team. How we build and check our tools.