Convert AIFF to FLAC
Convert AIFF to FLAC right in your browser — free, private, nothing is uploaded. A perfect, bit-for-bit lossless copy.
Convert AIFF to FLAC →Free · Private — runs in your browser, nothing is uploaded
AIFF is Apple's classic uncompressed audio container — the Mac counterpart to WAV. Same raw PCM audio, same huge files, mostly seen in pro-audio sessions and older Mac workflows.
FLAC compresses audio without losing anything — a perfect, bit-for-bit copy at a fraction of the WAV size, which makes it the default choice for archiving music.
Converting AIFF to FLAC is a pure win for storage: the copy is bit-for-bit identical to the original, at typically 50–70% of the AIFF size.
AIFF vs FLAC
| AIFF | FLAC | |
|---|---|---|
| Compression | lossless — nothing discarded | lossless — nothing discarded |
| Codec / container | uncompressed PCM in Apple's AIFF container | Free Lossless Audio Codec |
| Typical file size | very large — roughly 10 MB per minute, like WAV | medium — typically 50–70% of the equivalent WAV |
| Best for | Mac pro-audio sessions and sample libraries | archiving and lossless music libraries |
| Strength | uncompressed PCM, like WAV; native on macOS | lossless and compressed — a perfect copy, smaller than WAV |
| Watch out for | huge files; rarer than WAV outside Apple software | much larger than lossy formats; some older hardware skips it |
| Compatibility | native on macOS; most editors elsewhere open it too | wide in modern software; patchy on older hardware players |
How the conversion works
- Choose your AIFF file (up to 10 MiB). The button above opens the converter with FLAC already selected as the target format.
- There is no bitrate to choose: FLAC is lossless, so the bitrate field is simply ignored.
- Run the conversion and download the result — the output keeps your filename with a .flac extension. Everything happens locally: the page runs ffmpeg compiled to WebAssembly, so your audio is never uploaded to a server.
What to expect
Nothing is lost either way. AIFF and FLAC both store audio losslessly, so the samples come through bit for bit — only packaging and file size change. The bitrate setting doesn't apply to a lossless target.
Embedded album art is dropped along the way: cover images ride along as a video stream, which audio-only outputs like FLAC can't carry.
FAQ
Is converting AIFF to FLAC really lossless?
Yes — both formats store the audio losslessly, so the conversion is bit-transparent. What changes is packaging and file size, not sound.
How much smaller will the FLAC file be?
Typically 50–70% of the AIFF size — FLAC's compression is lossless, so the saving comes free. Exact ratios depend on the material: quiet, simple audio shrinks further than dense, loud mixes.
Is my AIFF file uploaded when converting to FLAC?
No. The page downloads an ffmpeg WebAssembly build once, then converts your file locally in the browser tab — the audio never leaves your device. Input files up to 10 MiB are supported.