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Broken Link Checker
Paste a page's HTML source to check its links for broken URLs — with an honest heads-up about what a browser can and can't verify.
Open the page, right-click → View Page Source (or Ctrl/Cmd+U), select all, copy, and paste it here.
Checks up to 30 links. Browsers block cross-site requests without permission (CORS) — links on other domains will often show "Unknown" rather than a false pass or fail.
Result
Paste HTML and analyze to see results.
How to use it
- 01Open the page and view its source (Ctrl/Cmd+U).
- 02Optionally enter the page's URL as a base, to resolve relative links.
- 03Copy the full HTML and paste it in, then click Check links.
- 04Review the results — OK, Broken, or Unknown.
Is my file uploaded?
No — links are checked directly from your browser to each destination, and the HTML you paste is never sent to a server. Because of that same browser security model (CORS), many cross-site links will come back as 'Unknown' rather than a false OK or Broken — that's a browser limitation, not a bug.
FAQ
- Why do some links show 'Unknown' instead of OK or Broken?
- Browsers block a webpage's JavaScript from reading the response of a request to a different site unless that site explicitly allows it (CORS). Most sites don't, so this tool honestly reports 'Unknown' rather than guessing.
- Is there a limit on how many links it checks?
- Yes, up to 30 links per run, to keep things fast and avoid overloading either your browser or the sites being checked.
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Built by Ni Wayan Astari — Performance Marketer with a strong interest in data and technology. See more free tools or selected work.