Bulk 404 Checker

What a real bulk 404 checker should do

Surface 404s, 410s, and soft 404s separately so you can prioritise true broken links over deliberately retired pages or thin-content responses that look 200 but aren't.

Process the entire list without rate-limiting itself into the ground. Domain-aware throttling means a 50,000-URL job that all hits one domain gets paced sensibly, not throttled like 50,000 separate hits.

Hard 404 vs soft 404 — why it matters

A hard 404 returns HTTP 404 status. A soft 404 returns 200 OK but the page content says "not found" or shows a generic search page. Soft 404s are SEO-toxic — Google treats them as 404s for ranking but they look fine to most checkers.

Our checker compares response body length, title content, and a few signal phrases against the rest of your domain to flag soft 404s. You can review the soft set separately and decide what to fix or noindex.

Common workflows

Site migration QA — submit your old sitemap before launch, find 404s introduced by the redesign before users do.

Backlink validation — paste your backlinks list, find every dead reference so you can request updates or replacements.

Internal-link audit — feed in every URL on your site, find pages linking to dead internal targets.