# Free Canonical URL Checker for SEO

> Paste a page URL to read its canonical tag, resolve it against redirects, and see whether it self-canonicalises correctly - no signup.

```yaml
url: "https://www.scrolllaunch.com/tools/canonical-url-checker"
slug: canonical-url-checker
category: onpage
keywords: "canonical url checker, check canonical tag, rel canonical checker, self canonical checker, canonical mismatch, free canonical checker"
```

## How to use

1. **Paste a page URL** - Use the exact URL you care about ranking - including path and query if relevant.
2. **Compare tags** - We follow redirects, read the canonical link, and compare it to the final URL.
3. **Align everything** - Make canonical, sitemap, and internal links agree on one HTTPS host.

## How to keep canonical tags clean

Every indexable page should have one self-referencing canonical that matches the HTTPS URL you want in Google.

Mismatches often appear after www/apex moves, trailing-slash changes, or CMS pagination bugs.

After fixing canonicals, re-check redirects and your sitemap so all three point at the same host.

## What you get

- Reads <link rel="canonical">
- Compares to final URL after redirects
- Flags mismatches and missing tags
- Works on any public page

## Related tools

- **[Redirect Checker](https://www.scrolllaunch.com/tools/redirect-checker)** - Free redirect checker - trace 301/302/307/308 chains, meta refresh, and the final landing URL.
- **[Sitemap Link Counter](https://www.scrolllaunch.com/tools/sitemap-link-counter)** - Free sitemap link counter - count URLs in XML sitemaps and sitemap indexes, including gzipped files.
- **[HTTP Header Checker](https://www.scrolllaunch.com/tools/http-header-checker)** - Free HTTP header checker - inspect status, security headers, caching, and X-Robots-Tag.
- **[robots.txt Tester](https://www.scrolllaunch.com/tools/robots-txt-tester)** - Free robots.txt tester - fetch live rules, list sitemaps, and test if a path is allowed.

## Related

- [All tools](https://www.scrolllaunch.com/tools)
- [Pricing](https://www.scrolllaunch.com/pricing) - launch free; dofollow while the badge stays on your site.
- [Directories](https://www.scrolllaunch.com/directories) - curated startup directories ranked by DR.