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Convertio vs Simple Audio Converter: catalog facts
Convertio	Simple Audio Converter
Freemium Free conversions in the browser, with paid plans for heavier use.	Free Free and open source under the MPL-2.0 licence.
Web	Android
More than 300 supported formats in one place Advanced options for many conversion types	Straightforward interface for quick conversions Uses ffmpeg for conversion
Files are uploaded to a third-party server Needs an internet connection	Few advanced conversion options by design Android only
Web application	Downloadable app
Closed source	Open source
License not stated	License: MPL-2.0
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.