Fission
A dead-simple, fast Mac editor for lossless trimming and joining, not a full DAW and not trying to be one.
PodStack editorial · Product research. How we review tools
Fission, from Rogue Amoeba, is a lightweight Mac app built for one job: fast, lossless editing of compressed audio files like MP3 and AAC without re-encoding them. It opens instantly and handles trimming, splitting, and joining files with none of the overhead of a full DAW.
Podcasters use it for quick jobs, chopping an intro off a raw recording, joining two halves of an episode that got split during recording, or fixing a single bad edit point without touching the rest of the file.
It pairs well with Rogue Amoeba's other tools like Audio Hijack, since they're built by the same small company with a similar philosophy: do one thing, do it fast, don't bloat it.
It is not a multitrack editor and never claims to be, so it's a companion tool to your main DAW rather than a replacement for it.
Sources for this review
- Fission official pricing · Checked 2026-09-06
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