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Fission vs mp3DirectCut: catalog facts
Fission	mp3DirectCut
Paid Paid app with a free download to try it before purchase.	Free Freeware with no paid tier.
macOS	Windows, Command line
Lossless cutting and trimming of MP3 and AAC Batch conversion between common formats	Lossless cutting and splitting with no re-encoding Very small download, about 374 KB
macOS only Not a multitrack or effects-heavy editor	Windows only, with Linux use through Wine Works with encoded MP3 and AAC, not a general multitrack editor
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License: Freeware
Not stated if an account is needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 1, 2026

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