Bookmark cleaner
Drop in a bookmarks export and this page finds the duplicates and strips the tracking junk out of your URLs, then hands you a cleaned file back.
Everything happens inside your browser. Your file is never uploaded, never stored, and never leaves your device — you can turn off your Wi-Fi and it still works.
Drop your bookmarks file here, or click to choose one
Browser export (.html) or Pocket export (.csv)
What this tool does and does not do
It finds duplicates by comparing the underlying page rather than the raw string, so example.com/post, www.example.com/post/ and example.com/post?utm_source=twitter are all recognised as the same bookmark. It keeps the earliest-saved copy of each.
It does not check whether links are still alive. A web page cannot test other websites for you — browsers block cross-origin requests, so any "dead link" verdict from a tool like this would be guesswork. Doing it properly needs a server that fetches every URL you submit, which is exactly the kind of thing we would rather not build or ask you to trust.