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Videomass vs Nmkoder: catalog facts
Videomass	Nmkoder
Free Free and open source.	Free Free and open source under the GPL-3.0 licence.
Windows, macOS, Linux	Windows
Access to FFmpeg features without the command line Handles several tasks at once	Graphical access to FFmpeg and av1an encoding Batch processing and multi-file muxing modes
Video downloading moved to the separate Vidtuber app Many options can be overwhelming for simple conversions	Windows only Development has been quiet since mid-2024
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: GPL-3.0
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked October 2, 2026

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