OpenSAK
// Open Source Swiss Army Knife for Geocachers
A free, modern alternative to GSAK — manage your geocache database locally on Windows, Linux, or macOS.
// Features
Built by geocachers, for geocachers. OpenSAK handles the heavy lifting so you can focus on the hunt.
Import GPX files and Pocket Query ZIP archives with full Groundspeak field support including logs, attributes, and waypoints.
18 filter types with AND/OR nesting. Save and reuse filter profiles. Filter by D/T, type, size, attributes, date, distance, and more.
Colour-coded cache pins with clustering on OpenStreetMap. Click any pin to jump directly to the cache in the list. Corrected coordinates for mystery caches shown with an orange overlay.
Send your filtered cache selection directly to a connected Garmin device via USB — ready for offline field use.
Built-in converter, projection calculator, checksum tool, midpoint finder, and distance/bearing calculator.
Plan geocaching trips with route optimisation and export. Select caches from your database and build an efficient field route.
Add, edit, and delete custom waypoints per cache — parking spots, trail heads, stages, and more.
Browse and search through all logs for any cache with keyword highlighting. Scroll through the full log history without leaving the app.
Full interface in 7 languages: English, Danish, French, Portuguese, Czech, Swedish, and German. Community translations welcome.
Manage separate databases for different regions or trips. Copy, rename, and delete databases and switch between them instantly.
All data stays on your own machine. No cloud, no accounts, no tracking. Your geocaching data is yours.
// Comparison
The only free, open source, cross-platform desktop geocache manager.
| Feature | OpenSAK | GSAK | iCaching | GeoGet |
|---|---|---|---|---|
| Free | ✓ Free | ✓ Free* | ✗ Paid | ✓ Free |
| Open Source | ✓ MIT | ✗ Closed | ✗ Closed | ✗ Closed |
| Linux | ✓ | ✗ | ✗ | ✗ |
| Windows | ✓ | ✓ | ✗ | ✓ |
| macOS | ✓ | ✗ | ✓ | ✗ |
| GPX / PQ Import | ✓ | ✓ | ✓ | ✓ |
| Advanced Filters | ✓ | ✓ | ✓ | ✓ |
| Garmin Export | ✓ | ✓ | ✓ | ✓ |
* GSAK became freeware in 2021 after active development ceased.
// Download
Pre-built packages for all platforms. No installation wizard, no license key, no nonsense.
// Open Source
MIT licensed. Every line of code is on GitHub. Contributions, bug reports, and translations are all welcome.