Nostr Backup

Back up your
Nostr and X posts.

A browser extension that saves your posts on this device. Import from Nostr relays, or capture your own X posts as you scroll your profile. Export your posts and saved media as a ZIP.

Get the extension

Downloads

Chrome

Unzip the download. Open chrome://extensions, enable Developer mode, then choose Load unpacked and select the folder.

Download ZIP

Firefox 140+

Open about:debugging#/runtime/this-firefox, choose Load Temporary Add-on and select the ZIP. Firefox removes temporary add-ons on restart, so export your archive first.

Download ZIP
Safari Experimental

On a Mac with Xcode, unzip the package into a folder named nostr-backup-safari, then run this command from its parent folder. Open the generated Xcode project and build the app.

xcrun safari-web-extension-packager nostr-backup-safari --app-name "Nostr Backup" --macos-only
Download Safari ZIP

Your first backup

Open the extension and go to Settings → Profile. Enter your Nostr public key, add your relay URLs and enable Import my Nostr posts.

For X, sign in with a private key or create a Nostr profile. Enter your X handle and enable capture. The extension signs each captured post and sends it to your chosen relays. Anyone can read posts you send to a public relay.

Choose Media → Back up media to save attachments, then Archive → Download ZIP to export a copy.