Simple
One thing, done well.
No modes, no clutter, no learning curve. When you do open the window, everything is already where you'd expect.
OtterZipFree
Zip. Done.
Right-click a file — it's zipped. Right-click an archive — it's out. You barely open the app.
Free · Windows · Automatic updates
Speed
A native core, quietly fast.
The engine is written in Rust — native code that does the work and doesn't leave you waiting.
Formats
Opens just about anything.
ZIP, 7z, RAR, TAR and more — with AES-256 and split archives when you need them.
- ZIP
- 7z
- RAR
- TAR
- AES-256
Privacy
No ads. No accounts. No tracking.
No bundles, no nagging, nothing to sign up for. It compresses and extracts, then gets out of your way. Crash reports are strictly opt-in.
Native UI
Looks like Windows, because it is.
Built with C# and WinUI — a real native interface, not a web page in a window. Fluent design, light or dark, ten languages.
Get OtterZip for Windows.
Install seamlessly through the Microsoft Store, or download the installer directly.
Microsoft Store
Install and update automatically through the Microsoft Store. Supports active development.
Get it free from Microsoft StoreFree · Windows · Automatic updates
Direct download
Download the MSIX installer directly. Exactly the same app, no ads, no account required.
Direct downloadWindows · Free MSIX installer · How to install →
How to install
The free direct download, installed in a few clicks.
Extract the zip
Unzip the downloaded
OtterZip_x64_installer.zipinto any folder.Right-click Install.ps1 → Run with PowerShell
Inside the extracted folder, right-click the
Install.ps1file and choose "Run with PowerShell".Click "Yes" on the prompt
A User Account Control (UAC) window appears. Click "Yes" — on the first install it registers the app's publisher certificate as trusted, one time.
Done — launch from Start
OtterZip is installed. Open it from the Start menu, or just right-click any file in Explorer.