Last updated: 30 March 2026
BookmarkOS is a Chrome extension. By default, all bookmark data (text, summaries, embeddings, tags) is stored locally in your browser using IndexedDB. Nothing leaves your device unless you explicitly use features that require server processing.
When BookmarkOS processes a bookmark, the text content of that bookmark is sent to our API server (api.bookmarkos.app) for:
We do not store the raw text of your bookmarks on our servers. Text is processed in-memory and discarded after the AI response is returned.
Pro users can optionally enable cloud sync. When enabled, bookmark metadata (summaries, tags, embeddings, URLs) is stored encrypted in our Cloudflare D1 database. You can delete your synced data at any time from the extension settings.
If you register (required for Pro features), we store your email address, license key, and API tokens. We use your email solely for account management and optional digest emails. We never sell or share your email with third parties.
Payments are processed by Lemon Squeezy. We do not store credit card numbers or payment details. See Lemon Squeezy's privacy policy.
We do not use any third-party analytics or tracking scripts on our website or extension. No cookies are set for tracking purposes.
You can delete all local data from the extension settings at any time. To delete your server-side account and any synced data, email hello@bookmarkos.app.
Questions about privacy? Email hello@bookmarkos.app.