404 Hunter

Find and clean up dead bookmarks. Detect 404s, slow pages, and broken links in your bookmark collection.

Tired of bookmarks that lead to 404s, abandoned blogs, or pages that take 30 seconds to load? 404 Hunter audits your entire bookmark collection in one click. What it does • Scans every bookmark via HEAD request with a configurable timeout • Classifies each URL into Healthy / Slow / Failed • Shows real-time progress in the popup • Streams full result details into the side panel (no truncation) • Lets you bulk-delete Failed or Slow bookmarks with one confirmation Highlights • Real-time stats — see Healthy / Slow / Failed counts as the scan runs • Side panel detail view — full URLs, response times, per-row retry / delete • Two-step delete confirm — click trash → click check, no intrusive popups • Light / Dark / System theme • Bilingual UI (中文 / English) • 100% local — no servers, no analytics Perfect for • Long-time Chrome users with hundreds of stale bookmarks • Researchers and curators who save a lot • Anyone who hates dead links Privacy 404 Hunter only contacts the URLs in your own bookmark list. It does not collect, transmit, or store any data externally. All state stays in your browser's local extension storage.