Convert OPUS to ALAC

Tested on Windows 11, 24 October 2026

Convert OPUS audio to ALAC in your browser or in the Filoshi app for Windows. ALAC stores the decoded audio without further loss. Nothing is uploaded.

Get Filoshi · $29Many files at once, no size limit, on Windows.

How to convert OPUS to ALAC in your browser

  1. 1
    Drop your OPUS file
    Drag it onto Filoshi above, or press Choose your OPUS file to pick it on your computer.
  2. 2
    Filoshi converts it
    ALAC is chosen already. FFmpeg, compiled to WebAssembly, converts it inside this browser tab.
  3. 3
    Save your ALAC file
    Download it when it is ready. Nothing was sent to a server.
Source format

What is OPUS?

Opus Audio (.opus). Opus is an open, royalty-free codec standardised by the IETF in 2012. It sounds very good at low bitrates for both speech and music, and it is the codec of WebRTC video calls and many voice-message apps.

Common use: Voice messages, calls, streaming, podcasts

Output format

What is ALAC?

Apple Lossless Audio Codec (.alac). ALAC is Apple's lossless codec: like FLAC it decodes to exactly the original audio, at roughly half the size of WAV. Apple released it as open source in 2011; iTunes, Apple Music and iPhones play it natively.

Common use: Lossless music on Apple devices

Questions about OPUS to ALAC

Is converting OPUS to ALAC free?
Yes, one file at a time: the converter on this page runs in your browser, files up to 100 MB, no sign-up. The Filoshi desktop app ($29 once, for Windows) converts many files at once and has no size limit.
Does converting OPUS to ALAC lose quality?
No further loss: ALAC keeps exactly what is decoded from the OPUS file. It cannot bring back detail that OPUS's lossy compression already removed, and the ALAC file is usually larger.
Is my OPUS file uploaded anywhere?
No. The converter on this page runs in your browser with FFmpeg compiled to WebAssembly; your OPUS file is read and converted on your device and never sent to a server. The desktop app works the same way, offline.
Has OPUS to ALAC been tested?
Yes. OPUS to ALAC is one of the 1,841 conversions that passed Filoshi's automated test matrix on Windows 11.
Can I convert many OPUS files at once?
Yes, in the desktop app. Drop as many OPUS files as you like on the window, pick ALAC once for all of them, and each file shows its own progress. The new files appear next to the originals, which are never changed.

Related conversions

Other OPUS conversions

OPUS to MP3OPUS to AACOPUS to OGGOPUS to FLACOPUS to M4AOPUS to AIFFOPUS to AC3OPUS to AU

Convert to ALAC

MP3 to ALACWAV to ALACAAC to ALACOGG to ALACFLAC to ALACM4A to ALACWMA to ALACAIFF to ALAC

Need OPUS to ALAC for many files?

The browser converter handles one file at a time. The Filoshi app for Windows converts as many as you drop, runs offline, and has 1,841 tested conversions.

Get Filoshi · $29