AIFF to FLAC Converter
Convert AIFF to FLAC free — no upload, no signup
To convert AIFF to FLAC, 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. Halve AIFF file sizes without losing a single sample.
Drop audio files here
or tap to browse · paste with Ctrl+V · add many at once
Your files never leave your device
FLAC is lossless — no bitrate to choose. Sample rate and channels are under Advanced.
Advanced
How to convert AIFF to FLAC
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.
Check the settings
FLAC 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 FLAC file or all of them as one ZIP.
Why convert AIFF to FLAC?
FLAC is the efficient way to archive uncompressed audio, and it's widely supported.
What happens when you convert AIFF to FLAC?
AIFF is losslessly compressed into FLAC, typically 50–70% of the original size.
How does Fylo convert AIFF to FLAC?
Fylo decodes the PCM audio in the AIFF with ffmpeg compiled to WebAssembly and encodes it with FLAC lossless compression. Both formats are lossless, so the decoded samples are identical; only the container and file size change (a 3-minute song is ≈ 32 MB as AIFF and ≈ 18–24 MB as FLAC). The original sample rate and channel layout are kept unless you change them under Advanced.
What's the difference between AIFF and FLAC?
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.
FLAC (Free Lossless Audio Codec) was released in 2001 and later maintained by the Xiph.Org Foundation. It compresses PCM audio like a ZIP file compresses data: nothing is thrown away, so a FLAC decodes to exactly the same samples as the source WAV, typically at 50–70% of the size.
Learn more: AIFF format guide · FLAC format guide
| Property | AIFF | FLAC |
|---|---|---|
| Compression | None (PCM) | Lossless |
| Typical bitrate | 1,411 kbps (CD quality) | ≈ 700–1,100 kbps |
| 3-minute song | ≈ 32 MB | ≈ 18–24 MB |
| Tags and cover art | Yes (ID3 chunk) | Yes (with cover art) |
| Compatibility | macOS, iTunes, DAWs; less common on Windows | Android, Windows 10+, macOS, most players and hi-fi gear |
| Best for | Mac audio editing and music production | Archiving music without quality loss |
| Introduced | 1988 | 2001 |
Frequently asked questions
Is it lossless?
Yes — FLAC decodes to the same samples.
Can Logic Pro open FLAC?
Recent versions can import FLAC.
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.
Related tools
Updated