Fission

A Mac audio editor for trimming, joining and splitting files without quality loss, plus batch conversion.

PaidProprietarymacOS

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About Fission

Fission handles simple audio edits: joining files, cropping and trimming, splitting long recordings, adding fades and editing metadata. Its edits do not re-encode audio, so MP3 and AAC files keep their original quality.

A batch converter exports dozens of files at once to MP3, AAC, Apple Lossless, FLAC, AIFF or WAV. It is aimed at quick editing jobs rather than multitrack production, and comes from Rogue Amoeba, the developer of Audio Hijack and Loopback.

Strengths

  • Lossless cutting and trimming of MP3 and AAC
  • Batch conversion between common formats
  • Simple, uncluttered editing interface
  • Metadata editing built in

Limitations

  • macOS only
  • Not a multitrack or effects-heavy editor
  • Paid after the trial

Details

Pricing
PaidPaid app with a free download to try it before purchase.
License
Proprietary
Developer
Rogue Amoeba
Platforms
macOS
How it runs
Downloadable app
Works offline
Yes
Best suited for
Mac users trimming podcasts, recordings or music files quickly
Categories
Audio tools
Last verified
Added
Provenance
Facts checked against the developer's own pages and store listings, 1 sources on file.

Alternatives to Fission

Compare all

Software that can replace Fission for an important use case, and what changes if you switch.

  • Amadeus Pro

    Paid multitrack audio editor and sound recorder for macOS with batch processing.

    PaidProprietarymacOS

    Amadeus Pro is a paid Mac editor that adds multitrack editing with non-destructive Audio Units effects and batch conversion with chained effects.

  • ocenaudio

    A free, cross-platform audio editor built for fast, straightforward editing of audio files.

    ocenaudio is a free, closed-source editor for Windows, macOS and Linux aimed at quick edits, though it does not advertise Fission's lossless MP3 and AAC trimming.

  • Audacity

    A multi-track audio editor and recorder that has been the free default for twenty-five years.

    Audacity is free and open source under GPLv3 on Windows, macOS and Linux, adding multitrack recording and many effects, but it edits destructively rather than cutting losslessly.

  • Tenacity

    A fork of Audacity created after the 2021 telemetry row, built to record and edit audio with nothing phoning home.

    Tenacity is a free, telemetry-free Audacity fork for Windows, macOS and Linux with plugin support and FFmpeg import and export, though releases are infrequent and macOS builds sometimes lag.

  • Adobe Audition

    A professional audio workstation for recording, editing, mixing and restoring audio for video and podcasts.

    PaidProprietaryWindowsmacOS

    Adobe Audition adds multitrack, spectral editing and restoration tools on Windows and macOS, but it requires a Creative Cloud subscription and an Adobe account instead of a one-off purchase.

Similar software

Related functionality, not necessarily a direct replacement.

  • XLD

    A Mac tool for ripping CDs and decoding, converting and splitting lossless audio files.

    FreeProprietarymacOS
  • Permute

    A drag-and-drop macOS converter for video, audio, images and PDFs across about 50 formats.

    PaidProprietarymacOS
  • Mp3tag

    A tag editor that fixes the metadata of a whole music folder at once, with online database lookups.

  • Piezo

    A simple Mac app for recording audio from any application or from a microphone.

    PaidProprietarymacOS
  • Audio Hijack

    Capture and process audio from Mac applications and input devices.

    PaidProprietarymacOS
  • fre:ac

    A free audio converter and CD ripper that converts between MP3, AAC, FLAC, Opus and more.

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