PROJ
proj.org
Free (verified)
Open-source library and command-line tools for coordinate transformations.
- Best for
- Developers and GIS users automating conversions.
- Cost
- Open source, X/MIT licence (stated on site).
- Category
- Coordinate conversion
- Source
- proj.org · checked 15 Oct 2026
Visit PROJ (opens in a new tab)
Thumbs up and down are anonymous and every count started at zero. How votes work.
More in Coordinate conversion
Know a tool we've missed?
Send the name, official link and what job it does. We check every listing ourselves before adding it.
Submit a tool