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GPS Visualizer vs Viking: catalog facts
GPS Visualizer	Viking
Free Free to use, supported by donations.	Free Free and open source under the GNU GPL.
Web	Windows, Linux
Many output formats, from Leaflet maps to KML and SVG Elevation profiles and elevation lookup	Edits tracks, routes and waypoints in GPX, KML and TCX Shows OSM, Bing Aerial and other map layers
Dense, dated interface with many options Online only	Real-time GPS and Mapnik rendering are not available on Windows GTK interface looks dated on Windows
Web application	Downloadable app
Closed source	Open source
License not stated	License: GPL
No account needed	No account needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.