Short version: Twitter has no export button for bookmarks, and it never has. But there is an honest way to get them out into something you own, searchable and backed up. Here's how.
Let's be straight about it. There is no export in the Twitter app, none in settings, and none in your account data archive. Once you bookmark something, it lives in an endless reverse-chronological list you can only scroll. The bookmark button is a one-way door: easy to put things in, no way to get them out.
Why you'd want them out
Bookmarks you can't search or back up aren't really yours. If your account is ever locked, or you just want to read your saves somewhere better, you need a copy that lives outside Twitter. And once they're out, you can finally search them, organize them, and reference them.
How to export your Twitter bookmarks, step by step
Install the Zihin Chrome extension and sign in.
Click sync. The extension opens your bookmarks page and reads it through your own logged-in session. Your Twitter login stays in the browser and never touches our servers.
Your bookmarks land in Zihin, auto-tagged and searchable, within seconds.
Export whenever you want. Your library is yours to download, so you always have a backup outside Twitter.
What you get once they're out
A real backup. Your saves live in a library you own, not locked inside an app.
Search by meaning. Find a save even when you've forgotten the exact words, something Twitter never let you do.
Chat with your saves. Ask a question across your bookmarks and get an answer cited from your own library.
LinkedIn and Chrome too. The same extension pulls in your LinkedIn saved posts and Chrome bookmarks, so everything you save is in one place.