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Videomass vs FormatFactory: catalog facts
Videomass	FormatFactory
Free Free and open source.	Free Free to download from Flathub.
Windows, macOS, Linux	Linux
Access to FFmpeg features without the command line Handles several tasks at once	Batch queue with progress, ETA and output size estimates Device and site presets plus a custom profile builder
Video downloading moved to the separate Vidtuber app Many options can be overwhelming for simple conversions	Linux only Flathub lists the license as proprietary despite open-source claims on the site
Downloadable app	Downloadable app
Open source	Closed source
License not stated	License not stated
No account needed	Not stated if an account is 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.