What is Kazi OS?
Kazi OS is a free, offline-first office suite with eight apps in one workspace. Learn what it does, how it stores your files and how to get started in under a minute.
Kazi OS is an office suite that runs in your browser and keeps working when your internet connection doesn't. It brings eight apps together in one workspace:
| App | Use it for |
|---|---|
| Kazi Docs | Letters, reports, proposals and any long document |
| Kazi Sheets | Budgets, trackers, invoices and data analysis |
| Kazi Slides | Presentations, built by hand or by the Kazi AI agent |
| Kazi PDF | Reading, signing, filling, merging and redacting PDFs |
| Kazi Notes | Meeting notes, voice memos, study notes and daily journals |
| Kazi Forms | Surveys, sign-up sheets, checklists and questionnaires |
| Kazi Draw | Flowcharts, org charts, mind maps and whiteboards |
| Kazi Mail | Email with your own @kazios.app address, next to your work |
On top of that, Kazi AI works inside every app: it can write and rewrite text, build whole slide decks, explain your numbers and draw diagrams.
Why people choose Kazi
- It's free. The core apps cost nothing and need no credit card.
- No signup to start. Open app.kazios.app and start working as a guest. Create a free account only when you want an email address, Kazi AI or cloud sync.
- It works offline. After your first visit the app is stored on your device. You can create, edit and export documents with no connection at all. See Offline and sync.
- Your files stay on your device. Documents are saved in your browser's storage on your own computer or phone. Nothing is uploaded unless you turn on sync, share a document, or ask Kazi AI for help.
- It speaks Office. Open Word, Excel and PowerPoint files, and export to Word, PowerPoint, PDF, CSV and Markdown. See Import and export.
Get started in three steps
- Go to app.kazios.app in Chrome, Edge, Firefox or Safari.
- Click + Docs, + Sheets, + Slides or any other app button at the top to create your first file.
- Optional: install Kazi as an app so it opens in its own window and works offline, and create a free account to get your @kazios.app email address.
Tip: Press Ctrl+K (⌘K on Mac) anywhere in Kazi to open the Command Launcher and jump to any app, file or action.
What you need
- A modern browser: Chrome, Edge, Brave, Opera, Firefox or Safari (recent versions).
- Any device: Windows, macOS, Linux, ChromeOS, Android, iPhone or iPad.
- An internet connection the first time you open Kazi. After that, Kazi works offline.