OtterZip is a modern archive utility built from scratch for Windows 11. The core engine is written in Rust to keep processing overhead low, and the UI sits on WinUI 3 so it blends in with the rest of the system. Key features Wide format coverage Extract: ZIP · 7z · RAR · TAR (.gz · .bz2 · .xz · .zst · .lz4) · GZ · BZ2 · XZ · LZMA · ZST · LZ4 · JAR · WAR · EAR · IPA · APK · AAB · APPX · MSIX · XPI · CRX · ISO · IMG · CAB · MSI · DEB Create: ZIP · 7z · TAR · TAR.GZ · TAR.BZ2 · TAR.XZ · XZ · ZIPX Shell integration — right-click any file or folder in Explorer to compress or extract directly Window-wide drop — drop files anywhere on the main window; OtterZip picks compress or extract based on what you dropped Password-protected ZIPs — entered passwords live in zero-on-drop memory and are never written to disk or logs Multi-volume archives — auto-joins .zip.001, .7z.001 splits Zip-bomb defense — three-layer guard (per-entry ratio, cumulative ratio, absolute byte cap) stops disk-exhaustion attacks Path-traversal defense — validates against .., absolute paths, NTFS Alternate Data Streams, reserved names, trailing whitespace, and control characters 10 languages — Korean · English · Japanese · Chinese (Simplified) · German · French · Spanish · Portuguese (Brazil) · Russian · Italian Auto dark / light / high-contrast — follows the system theme No ads · no accounts · free