Canonical URL Checker
Check HTML for canonical tag presence, duplicates, and URL match. Free, private, and local-first.
Use Canonical URL Checker
Check pasted HTML for canonical tag presence, duplicates, and URL match.
Status
Canonical matches
Canonicals
1
https://codevella.com/tools/json-formatter
Quick answer
Canonical URL Checker is a free online tool that helps you check HTML for canonical tag presence, duplicates, and URL match. It runs in your browser, so you can work with development data, text, files, or generated output without creating an account.
About Canonical URL Checker
Canonical URL Checker helps you check HTML for canonical tag presence, duplicates, and URL match. It is designed for focused local-first workflows where you need a quick result without creating an account or sending your input to a server.
Common uses include checking tool page metadata, auditing duplicate content signals, reviewing migration templates.
Use the examples, usage notes, FAQ, and related tools below when you need to compare formats, build sample data, validate inputs, or move into the next step of the same workflow.
What this tool does
How to use Canonical URL Checker
- 1
Enter the page URL.
- 2
Paste the page head or full HTML.
- 3
Review canonical status and detected URLs.
- 4
Fix missing, duplicate, or mismatched tags in your template.
Examples
Good
<link rel="canonical" href="https://example.com/page">
Missing
No canonical link in the head
Duplicate
Two canonical tags in one document
Use cases
- Checking tool page metadata
- Auditing duplicate content signals
- Reviewing migration templates
- Testing CMS output
- Preparing SEO QA checklists
Related workflow
After using Canonical URL Checker, many workflows continue with related tools for validation, conversion, cleanup, mock data, or final export.
Privacy and usage notes
CodeVella tools are designed to run locally in your browser. Your input is not uploaded to a server, and no account is required.
Generated test data is intended for development, QA, demos, and safe internal workflows.
Frequently asked questions
Is my data uploaded?+
No. This tool is designed to run locally in your browser.
Do I need an account?+
No signup is required for CodeVella tools.
What does this canonical URL checker do?+
Canonical URL Checker helps you check html for canonical tag presence, duplicates, and url match without sending the pasted data to a server.
What should I double-check before using the output?+
The checker analyzes pasted HTML only. Search engines may still choose a different canonical based on redirects, links, sitemap data, and page content.
Can I copy the generated output?+
Yes. Tools with generated code, URLs, XML, or structured output include a copyable output area.