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Your bookmarks live in a file.
Here's how to fix it.
Most people have thousands of bookmarks, a third of which point at websites that no longer exist. Drop your bookmarks file in below and get it back under control — in your browser, on your machine, with nothing sent to a server.
Your file is read locally and never uploaded
The tools
Dead link checker
Find the bookmarks pointing at domains that no longer answer, then download a cleaned file.
Most popularDuplicate finder
Years of syncing leaves the same page saved four times. Find every copy and keep one.
CleanupMerge bookmark files
Combine exports from Chrome, Firefox, Safari and Edge into one file, without duplicates.
Switching browsersConvert & export
Turn bookmarks.html into CSV, Markdown, JSON or OPML — for Notion, Obsidian or a spreadsheet.
ExportBookmark file viewer
Open a bookmarks file and actually read it: full folder tree, instant search, and the stats.
InspectLost your bookmarks?
If they've just vanished, close the browser before doing anything else — every browser keeps a recent backup and overwrites it shortly after the next launch. Start with the recovery guide.
Chrome
Profile path, the Bookmarks.bak trick, export and import.
Firefox
places.sqlite, automatic JSON backups, and restoring them.
Safari
Bookmarks.plist, iCloud sync, and Time Machine recovery.
Edge
Where Edge keeps favorites now, and what happened to the old IE ones.
iPhone & Android
Why the file is unreachable on mobile, and how to get an export anyway.
The file format
What's actually inside bookmarks.html, attribute by attribute.
Backing up
Why sync isn't a backup, and the ten-second habit that replaces it.
Switching browsers
Moving everything across without ending up with two of each.
The other kind of favorites file
The File
A short, opinionated dossier on the things worth owning in one category at a time — what we'd actually buy, what we'd skip, and why. One issue at a time, no listicles.
Why in-browser?
A bookmarks file is a map of everything you read, bank with, work on and shop for. Handing that to a website in exchange for a duplicate check is a bad trade.
So none of these tools have an upload button. Your file is read by JavaScript running on your own machine, the results are rendered locally, and any file you download is generated locally too. Close the tab and it's gone. You can turn off your network connection after the page loads and every tool here still works — except the dead link checker, which by definition has to knock on the doors.