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To Audio Converter vs fre:ac: catalog facts
To Audio Converter	fre:ac
Freemium Offered as a free download; the homepage does not give details of any paid upgrade.	Free Free to use; the project accepts donations.
macOS	Windows, macOS, Linux
Batch conversion that keeps folder structure, file names and tags Accepts over 200 audio and video input formats	Wide range of input and output formats Converts whole libraries and keeps folder structure
macOS only Closed source, and pricing details are not stated on the homepage	Releases are infrequent Interface is functional rather than modern
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 23, 2026

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