Getting started with Canonical URL Checker

Most people open Canonical URL Checker with one specific question and no interest in a tour. Client-side canonical URL heuristics (no crawl). The sections below cover when that helps, how to work through it quickly, and what to double-check before you use the output.

When Canonical URL Checker is the right tool

These helpers check the artefacts you author, which is where most avoidable indexation problems start.

• Review campaign URLs before setting a canonical.
• Train teammates on www, slash, and UTM pitfalls.
• Double-check absolute HTTPS targets in a CMS field.
• Document intended canonicals for a migration.

Getting a reliable result

Draft the field, preview how it truncates, then compare it against what the page actually delivers. Because nothing is crawled here, pair these checks with a real crawler before concluding a live page is fine.

• Prefer absolute https canonicals.
• Keep one preferred host and slash convention.
• Strip tracking parameters from canonicals when possible.

Mistakes that waste time

• Assuming this tool inspected the live HTML.
• Pointing every page at the homepage canonical.
• Leaving utm parameters in the canonical URL.
• Mixing http and https preferred versions.

Privacy and local processing

Only the text and URLs you paste are analysed, in the browser. No page is fetched and nothing is stored server-side.

Related tools and reading

Open Canonical URL Checker to try it with your own input. Nearby utilities include Keyword Density Analyzer and Meta Tag Preview. For background, read SEO metadata that earns the click, and browse the SEO Helpers collection for the rest of the cluster.