Opus to AIFF Converter
Convert Opus to AIFF free — no upload, no signup
To convert Opus to AIFF, drop your Opus audio files into the box below and click Convert. Fylo converts with ffmpeg running inside your browser, so nothing is uploaded and there's no signup or watermark. Decode Opus to AIFF for Mac editing.
Drop audio files here
or tap to browse · paste with Ctrl+V · add many at once
Your files never leave your device
AIFF is lossless — no bitrate to choose. Sample rate and channels are under Advanced.
Advanced
How to convert Opus to AIFF
Add your Opus files
Drag and drop Opus files into the box or tap to choose them. The converter engine (about 31 MB) downloads once, the first time you convert.
Check the settings
AIFF is lossless, so there's no bitrate to pick. Change sample rate or switch to mono under Advanced if a device needs it.
Convert and download
Click Convert, then download each AIFF file or all of them as one ZIP.
Why convert Opus to AIFF?
Mac audio apps import AIFF natively.
What happens when you convert Opus to AIFF?
Decoded to 16-bit PCM AIFF at 48 kHz.
How does Fylo convert Opus to AIFF?
Fylo decodes the Opus audio in the Opus with ffmpeg compiled to WebAssembly and encodes it with 16-bit big-endian PCM with no compression. Nothing is added back: the AIFF is an exact but larger copy of the decoded Opus (≈ 32 MB for a 3-minute song versus ≈ 2.9 MB at 128 kbps). The original sample rate and channel layout are kept unless you change them under Advanced.
What's the difference between Opus and AIFF?
Opus is an open, royalty-free codec standardised by the IETF as RFC 6716 in 2012. It blends speech technology from Skype's SILK with music coding from Xiph's CELT, so it handles both voice and music well. Files are usually stored in the Ogg container with the .opus extension.
AIFF (Audio Interchange File Format) was created by Apple in 1988, based on Electronic Arts' IFF format. Like WAV it stores uncompressed PCM audio — just with big-endian byte order — so the two contain identical sound data at the same settings.
Learn more: Opus format guide · AIFF format guide
| Property | Opus | AIFF |
|---|---|---|
| Compression | Lossy | None (PCM) |
| Typical bitrate | 24–160 kbps | 1,411 kbps (CD quality) |
| 3-minute song | ≈ 2.9 MB at 128 kbps | ≈ 32 MB |
| Tags and cover art | Yes (Vorbis comments) | Yes (ID3 chunk) |
| Compatibility | Browsers, Android, WhatsApp, Discord; partial on Apple | macOS, iTunes, DAWs; less common on Windows |
| Best for | Voice notes, podcasts, streaming at low bitrates | Mac audio editing and music production |
| Introduced | 2012 | 1988 |
Frequently asked questions
Does converting Opus to AIFF improve quality?
No. Opus is lossy, so detail removed during its compression can't be restored. The AIFF is a lossless copy of what the Opus sounds like — bigger, but not better.
Can GarageBand open the result?
Yes.
Is my Opus file uploaded to a server?
No. Fylo runs ffmpeg, the same engine used by professional video tools, compiled to WebAssembly inside your browser. Your Opus file is read directly from your device and never sent anywhere.
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