Bulk HTTP Status Code Checker

Three typical use cases. First, backlink audit, verify that a profile of received links points to 200 pages and not to 404s (which would destroy SEO juice). Second, migration, confirm that all old URLs return proper 301s to the new structure. Third, internal audit, spot pages that go to 5xx, 404 or multi-hop redirect chains (lost crawl budget).

2xx = success (200 OK is ideal). 3xx = redirect (301 permanent, transfers SEO juice; 302 temporary, avoid for SEO; 307/308 modern equivalents). 4xx = client error (404 not found, 410 deleted permanently, 403 forbidden, 451 legally blocked). 5xx = server error, always investigate immediately, it penalizes crawl.

A 301 transmits ~99% of SEO juice according to Google statements. A 302 transmits much less (Google treats it as "temporary", so the origin URL keeps its ranking). And each hop in a chain (301 → 301 → 200) adds latency and a risk that Google stops before the end. Best practice: aim for 0 or 1 hop max, always 301 (or 308), never 302.

Up to 50 URLs in parallel, with an 18-second total budget and 5 seconds per URL. Beyond that, the tool silently truncates the list to prevent server abuse. For larger audits (1,000+ URLs), use a dedicated crawler, Screaming Frog locally remains unbeatable at that volume.