Frequently Asked Questions

Everything you need to know about merging JW Library backups, privacy, platform support, and step-by-step instructions.

No, never. JW Fusion runs 100% locally on your computer or phone inside your browser. Your backup files never leave your device. No cloud storage is used, no account or login is required, and no analytics track your backup contents.
JW Fusion is available as a native app for Windows desktop and Android.

For iOS (iPhone / iPad), Mac, and Linux, JW Fusion operates as an installable Progressive Web App (PWA). Simply open this website in Safari or Chrome, tap Share → Add to Home Screen, and you will have a full offline app experience directly on your iOS device.
JW Fusion tracks and merges five specific user data categories:
  • Notes (custom titles, content, timestamps, and locations)
  • Highlights (colors, text token selections, and publication references)
  • Bookmarks (custom slots and publication markers)
  • Tags (custom tag categories and note mappings)
  • Playlists (media playlists, position ordering, and markers)
The merger engine compares entries across all imported backup databases. Identical notes, highlights on the same verses, matching bookmarks, and duplicate tag names are merged cleanly without creating redundant duplicate rows or corrupting database indexes.
  1. Open the JW Library app on your phone, tablet, or computer.
  2. Go to the Personal Study tab (or tap Settings).
  3. Tap Backup and Restore.
  4. Tap Create a Backup and save the .jwlibrary file to your device storage or files app.
  1. After downloading the merged file from JW Fusion, open JW Library.
  2. Go to Personal Study (or Settings) → Backup and Restore.
  3. Tap Restore a Backup.
  4. Select the downloaded merged file. JW Library will reload your personal study data with all notes, highlights, bookmarks, tags, and playlists combined!
JW Fusion is 100% free with no pricing tiers, subscriptions, ads, or monetization.
No. JW Fusion is an independent, unofficial tool and is not affiliated with or endorsed by the Watch Tower Bible and Tract Society of Pennsylvania. "JW Library" is their trademark.
Email [email protected] with any bugs, questions, or feedback.