Broken Link Checker
Paste HTML, extract its links, and attempt a check for each one. Because browsers block most cross-site requests, most external links will honestly report as Unknown (CORS-blocked) rather than Broken. A link is only labelled Broken when the browser actually receives an error response — never guessed.
Most external links will be Unknown because browsers block cross-site checks. Unknown is never presented as Broken.
What this tool cannot do
Browser CORS limits mean most external links cannot be verified from this page and are labelled Unknown. Unknown does not mean broken. A full crawl needs a server-side checker.
How to use it
- Paste the page's HTML.
- Click Check links.
- Investigate links labelled Broken; re-check Unknown links with a server-side tool if they matter.
Frequently asked questions
Why are most links Unknown?
Your browser blocks the tool from reading other sites' responses. That is a browser security rule, not a problem with the links.
Is Unknown the same as broken?
No. Unknown means this tool could not verify the link. Do not delete links just because they are Unknown.