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Runs in your browser · Last updated 7 September 2026

Free Redirect Map Checker — From/To CSV

Free redirect map checker. Paste a from→to CSV — loops, chains, duplicate sources, self-maps. Does not fetch URLs. Browser tool — nothing is uploaded.

Header optional (from,to or source,target). We do not fetch URLs — this checks the map you are about to ship.

Pairs

5

Issues

4

Chains

1

Loops

1

Report
ERROR row 4: Self-redirect (from equals to).
ERROR row 6: Conflicts with row 5 (https://new.example/one).
WARN row 2: Chain of 2 hops from https://old.example/blog. Point directly at the final URL.
ERROR row 4: Redirect loop involving https://old.example/a.

How to use this tool

  1. Paste a CSV with from,to (header optional).
  2. Fix self-redirects, conflicting duplicates, and loops.
  3. Collapse chains so every source points at the final URL.

Worked example

/blog → /articles plus /articles → /posts is a two-hop chain — point /blog at /posts. After the map is clean, stamp lastmod on the surviving URLs with the sitemap lastmod helper or build a canonical with the canonical URL builder.

Frequently asked questions

Do you fetch the live URLs?
No. Paste a from,to CSV. We flag self-maps, duplicate sources, chains, and loops in this tab.
Relative paths?
Allowed, with a warning. Confirm the host on the server or CDN map.
Why flatten chains?
A→B→C wastes a hop and can drop link equity. Point A at C directly.
Uploaded?
No.