How to use Canonical Tag Checker
- Paste the text you need to check into the input box.
- Set Paste a page’s HTML or its <head> so the output fits your use case.
- The result is computed live in your browser as you edit the input.
- When it looks right, Copy to save it.
About this tool
Canonical Tag Checker is a static, client-side tool with no backend. Canonical Tag Checker is a free SEO & Webmaster Tools utility that runs in your browser, doing its work on the input you provide without a backend.
It is designed to do one job well and stay out of your way. Your input never leaves the page, and no account or install is required.
Frequently asked questions
What does Canonical Tag Checker do?
Canonical Tag Checker lets you check your input right in the browser using the Paste a page’s HTML or its <head> control, with the result shown instantly and nothing uploaded.
Is Canonical Tag Checker free to use?
Yes — Canonical Tag Checker is completely free, with no usage limits.
Is my input private in Canonical Tag Checker?
Yes — your input never leaves your device; Canonical Tag Checker does all the work in your browser.
Does Canonical Tag Checker work offline?
Once the page has loaded, Canonical Tag Checker keeps working with no network connection.