Offline use, sync and backup
How Kazi works without internet, where your files are stored, how cloud sync works, and how to back up and restore everything.
Kazi is built offline-first. The app and your files live on your device, so a dropped connection never stops your work.
How offline works
- First visit: while you're online, Kazi saves the app itself on your device. Installing it as an app (see how) makes this permanent.
- Working: every change is saved on your device as you type. There is no "save to the cloud" to wait for.
- Offline: keep creating, editing, printing and exporting. An offline badge appears so you know you're disconnected.
- Back online: anything that needs the internet, such as synced files, sending email or Kazi AI, catches up automatically in the background.
What works offline
| Works offline | Needs internet |
|---|---|
| Creating and editing all file types | Kazi AI |
| Formulas, charts, slides, PDF signing | Sending and receiving email (messages queue until you're back) |
| Importing and exporting files | Cloud sync to other devices |
| Printing and saving as PDF | Opening share links from other people |
| File Manager, search and templates | Installing app updates |
Where your files are stored
Files are saved in your browser's private storage (IndexedDB) for kazios.app on this device. Other websites can't read it, and nothing leaves your device unless you sync, share, email a file or send content to Kazi AI.
Warning: Clearing your browser's "site data" or "cookies and site data" for kazios.app deletes files that are only on this device. Use cloud sync or a backup for anything important.
Cloud sync
With a free Kazi account you can sync files across your devices:
- Sync a file or folder: in the File Manager, open its ⋮ menu → Sync File to Cloud…. Synced folders show a cloud badge, and new files you create inside them sync too.
- Sync status: the sync indicator in the top bar shows when everything is up to date. Syncing runs quietly in the background and never blocks your work.
- On another device: sign in, and synced files download automatically.
Back up everything
In the File Manager, click Backup to download a single .json file containing your whole local vault: every document, sheet, deck, PDF, note, form and diagram.
To restore, click Upload in the File Manager and choose the backup file. Restored files are tagged restored-backup so you can find them.
Tip: Make a backup before clearing browser data, switching browsers or reinstalling your computer.