Compare software

fre:ac vs Convertio: catalog facts
fre:ac	Convertio
Free Free to use; the project accepts donations.	Freemium Free conversions in the browser, with paid plans for heavier use.
Windows, macOS, Linux	Web
Wide range of input and output formats Converts whole libraries and keeps folder structure	More than 300 supported formats in one place Advanced options for many conversion types
Releases are infrequent Interface is functional rather than modern	Files are uploaded to a third-party server Needs an internet connection
Downloadable app	Web application
Open source	Closed source
License not stated	License not stated
No account needed	Not stated if an account is needed
Works offline	Needs internet
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

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