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Convertio vs Transmute: catalog facts
Convertio	Transmute
Freemium Free conversions in the browser, with paid plans for heavier use.	Free Free and open source under the MIT licence.
Web	Web, Self-hosted
More than 300 supported formats in one place Advanced options for many conversion types	Converts many file types in one tool Files stay on your own hardware
Files are uploaded to a third-party server Needs an internet connection	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
Not stated if an account is 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.