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SEO and auditingChecked through WebDiag API

Redirect Map Validator

Paste a CSV or TSV migration map. WebDiag checks only explicit source URLs and compares the first redirect hop with the expected target.

  • up to 25 rules
  • first-hop validation
  • duplicates / chains / cycles
Online tool

Try the tool

Enter a URL: WebDiag will run a safe network check and show the result.

Input

Columns: source,target,status. Header is optional. Maximum 25 rows.

Network check through backend

For HTTP/SEO tools, the URL is sent to the WebDiag API, where SSRF protection, DNS/IP policy, and redirect limits are applied.

Reviewed: 2026-07-17
01

How to use it

  1. 1

    Prepare source,target,status CSV or TSV.

  2. 2

    Run the bounded check against public HTTP/HTTPS sources.

  3. 3

    Fix mismatches, conflicts, chains, and cycles before deployment.

02

What the tool can do

  • Compares the observed first redirect target and optional 301/302/303/307/308 status.
  • Finds duplicate or conflicting sources, self redirects, map chains, and cycles.
  • Revalidates DNS and every redirect target through SafeHttpFetcher.
03

Common use cases

  • Validate a migration redirect spreadsheet after release.
  • Find chains and conflicting rules before importing into nginx, a CDN, or a CMS.
  • Recheck critical URLs after routing changes.
04

How it works inside

Each source is checked with a separate bounded safe fetch without reading the body.

The first hop is compared; additional hops are reported as a chain review signal.

05

Questions and answers

Can I upload a redirect map with tens of thousands of URLs?

No. This public tool is limited to 25 explicit rows. Bulk validation needs separate job architecture, queues, and rate limits.

Why compare the first redirect hop?

A redirect map usually describes the immediate source-to-target rule. The final URL is shown separately and extra hops are flagged as a chain.