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Zamzar vs Transmute: catalog facts
Zamzar	Transmute
Freemium Free for files up to 50 MB; larger files need a paid account.	Free Free and open source under the MIT licence.
Web	Web, Self-hosted
Over 1100 supported formats No account needed for small files	Converts many file types in one tool Files stay on your own hardware
50 MB limit on the free tier Files are uploaded to a third-party server	Requires running your own server A young project compared with established converters
Web application	Self-hosted
Closed source	Open source
License not stated	License: MIT
No account needed	Not stated if an account is 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 October 2, 2026

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