JOSM is an extensible editor for OpenStreetMap (OSM).
The editing tool contains many features that are not present in OSM’s default online editor.
This is free and open source software.
Key Features
- Supports loading GPX files (GPS tracks).
- Background imagery with support for WMS, TMS and WMTS protocols.
- Support for multiple cartographic projections, layers, and relations editing.
- Data validation tools.
- Data filtering.
- Offline work.
- Presets.
- Rendering style.
- OSM data from local sources as well as from online sources.
- Edit the OSM data (nodes, ways, and relations) and their metadata tags.
- Plugins support.
- Cross-platform support: Runs under Linux, MacOS, Windows, and other operating systems that support Java 8+.
Website: josm.openstreetmap.de
Support: Help, Forum
Developer: Dirk Stöcker and other contributors
License: GNU General Public License v2 or later

JOSM is written in Java. Learn Java with our recommended free books and free tutorials.
Related Software
| Mapping Tools | |
|---|---|
| Organic Maps | Offline maps & GPS app for hiking, cycling, biking, and driving |
| CoMaps | Community-led maps and navigation application |
| QGIS | GIS that supports vector, raster, and database formats |
| Marble | Virtual globe and world atlas |
| Placemark | Web-based tool for geospatial data |
| JOSM | Extensible editor for OpenStreetMap |
| uMap | Web application for creating and publishing custom interactive maps |
| Map | Wardley map editor |
| Kadas Albireo | Mapping application based on QGIS targeted at non-specialized users |
| TuiView | Lightweight raster GIS |
| Pure Maps | Native map and navigation application |
| Merkaartor | OpenStreetMap mapping program |
| GNOME Maps | Find places around the world |
| VersaTiles | Generate, process, store, serve, and render map tiles |
Read our verdict in the software roundup.
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