AIFF to Opus Converter
Convert AIFF to Opus free — no upload, no signup
To convert AIFF to Opus, drop your AIFF 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. Make tiny, high-quality copies of AIFF recordings.
Drop audio files here
or tap to browse · paste with Ctrl+V · add many at once
Your files never leave your device
Advanced
How to convert AIFF to Opus
Add your AIFF files
Drag and drop AIFF files into the box or tap to choose them. The converter engine (about 31 MB) downloads once, the first time you convert.
Pick a bitrate
192 kbps suits music and 128 kbps or less suits speech. Sample rate and mono/stereo are under Advanced.
Convert and download
Click Convert, then download each Opus file or all of them as one ZIP.
Why convert AIFF to Opus?
Opus is ideal for sharing voice and music at small sizes.
What happens when you convert AIFF to Opus?
Encoded to Opus at 48 kHz, 160 kbps by default.
How does Fylo convert AIFF to Opus?
Fylo decodes the PCM audio in the AIFF with ffmpeg compiled to WebAssembly and encodes it with FFmpeg's native Opus encoder at 160 kbps and 48 kHz in an Ogg container. Going from lossless to lossy is where the big saving happens: a 3-minute song is ≈ 32 MB as AIFF but ≈ 2.9 MB at 128 kbps as Opus. Opus always runs at 48 kHz, so the audio is resampled if needed.
What's the difference between AIFF and Opus?
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.
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.
Learn more: AIFF format guide · Opus format guide
| Property | AIFF | Opus |
|---|---|---|
| Compression | None (PCM) | Lossy |
| Typical bitrate | 1,411 kbps (CD quality) | 24–160 kbps |
| 3-minute song | ≈ 32 MB | ≈ 2.9 MB at 128 kbps |
| Tags and cover art | Yes (ID3 chunk) | Yes (Vorbis comments) |
| Compatibility | macOS, iTunes, DAWs; less common on Windows | Browsers, Android, WhatsApp, Discord; partial on Apple |
| Best for | Mac audio editing and music production | Voice notes, podcasts, streaming at low bitrates |
| Introduced | 1988 | 2012 |
Frequently asked questions
Good for podcasts?
Yes, at 64–96 kbps.
Can everyone play Opus?
Most browsers and Android devices can.
Is my AIFF file uploaded to a server?
No. Fylo runs ffmpeg, the same engine used by professional video tools, compiled to WebAssembly inside your browser. Your AIFF file is read directly from your device and never sent anywhere.
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