About this plugin
Broken link checker that finds and fixes 404s, dead links, broken images and redirect chains — fast, private, and light on your server.
The broken link checker that grades your whole site
404Zen is a fast, private broken link checker for WordPress. It scans every post, page, image and menu for broken links, 404 errors, dead links, missing images and redirect chains — entirely on your own server, with no cloud and no account — then distills it all into a single Link Health Grade (A–F) so you know exactly where your site stands.
Broken links quietly cost you visitors and tell Google your content is decaying. 404Zen lets you fix them in one click — edit the URL, unlink it, or dismiss a false positive — without ever leaving WordPress. Your first scan starts automatically the moment you activate.
No setup wizard. No limits.
Why site owners choose 404Zen
A grade, not a data dump. One letter tells you instantly whether your links are helping or hurting your SEO, and the dashboard shows exactly what to fix first.
Everything runs on your server. Your URLs never leave your site — no third-party scanning service, no account, private by design.
Unlimited scanning, free forever. No monthly credits, no metering, no “250 links per month” ceiling.
Fixes, not just reports. Edit a URL, unlink it, or dismiss a false positive right from the results table — you never have to open the post editor.
Gentle on your server. Checks run in small background batches with load-aware pausing, tuned for shared hosting rather than just big VPS boxes.
What 404Zen finds
Broken internal and external links (404s), dead links, missing images, redirect chains and loops, timeouts, and DNS failures — all flagged and grouped so you can act on them fast.
Your Link Health Checklist
A guided checklist walks you from your first scan to a clean, protected site — right down to confirming you’re serving HTTPS. Reach 100% and your visitors stop hitting dead ends.
404Zen Pro — set it and forget it
Upgrade when you’re ready for one-click auto-redirects that send visitors from broken URLs straight to the right page, plus CSV exports and multisite management. One license, one flat price, with a lifetime option available — no per-link nickel-and-diming, and a 14-day money-back guarantee.
9, 1M+ downloads). Focused plugins. Zero bloat.
External services
404Zen checks links on your own server via the WordPress HTTP API. php ), only if you tick the optional product-updates opt-in, which sends just the email address you enter — see the Zen Plugins privacy policy. Nothing else ever leaves your site.