Source data
Paste CSV or choose a local file
Recognized headers include source/target, from/to, old_url/new_url, and origin/destination. Headerless two-column input is accepted.
No redirect data has been processed.
Free browser tool
Check your redirect map before launch
Paste a two-column redirect map or upload a CSV. The tool finds duplicate sources, conflicting destinations, chains, loops, self-redirects, and malformed entries without fetching any URL.
Everything runs in this browser tab. The file is not uploaded, stored, or checked against the live web.
Your file stays in this browserThe tool checks your file without visiting its URLs. Reloading clears the input and results.
Rows to review before deployment
The CSV download contains only the rows with issues.
No conflicts were found in this file. Check the redirects on your website after applying them.
| Severity | Row | Source | Destination | Finding | Detail |
|---|
Input
Two columns: old URL and new URL
Use headers such as source/target, from/to, old_url/new_url, or origin/destination. Headerless two-column CSV also works. Relative paths and absolute HTTP(S) URLs are accepted.
Boundary
What this tool can check
The tool checks the map you provide. It does not visit the URLs or run server, regex, or wildcard rules, so you still need to test the redirects on the live website.
Need help applying or checking your redirects?
I can check where your old URLs lead, fix redirect problems, and update the internal links and sitemap before or after a migration.