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Videomass vs Constrict: catalog facts
Videomass	Constrict
Free Free and open source.	Free Free and open source under the GPL-3.0-or-later.
Windows, macOS, Linux	Linux
Access to FFmpeg features without the command line Handles several tasks at once	Targets an exact output file size automatically Batch compression of multiple videos
Video downloading moved to the separate Vidtuber app Many options can be overwhelming for simple conversions	Steep size reductions can badly hurt quality or fail Speed limited by local hardware
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: GPL-3.0-or-later
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 1, 2026

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