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FormatLab vs Videomass: catalog facts
FormatLab	Videomass
Freemium Free to download; the product is sold as FormatLab PRO, so check the developer page for…	Free Free and open source.
Windows, Linux	Windows, macOS, Linux
Converts between a wide range of video and audio formats Compression with user-controlled quality	Access to FFmpeg features without the command line Handles several tasks at once
Proprietary licence despite published code Pricing for PRO features is not clearly stated	Video downloading moved to the separate Vidtuber app Many options can be overwhelming for simple conversions
Downloadable app	Downloadable app
Closed source	Open source
License: Proprietary	License not stated
Not stated if an account is needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 24, 2026

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