AIFF stores uncompressed audio like WAV but originated on the Mac, and it carries richer metadata tags.
Common Uses
Mac audio editing
Professional music
Lossless audio
AIFF Conversion FAQ
Is AIFF lossy or lossless?
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AIFF is lossless — the audio you encode is the audio you get back. AIFF stores uncompressed big-endian PCM — the Apple-side equivalent of WAV, with the same bit-for-bit fidelity.
What does it mean that AIFF is lossless?
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That the decoded audio is bit-for-bit what went in. Nothing is thrown away on the assumption you will not hear it, so an AIFF can be re-encoded, edited and re-saved indefinitely without accumulating the artefacts that stack up in lossy formats. The price is size — several times a compressed equivalent — which is why lossless is the right choice for masters and the wrong one for a phone full of music. AIFF is the studio interchange format on macOS, handles metadata better than plain WAV, and imports into Logic and Pro Tools instantly.
Why do professional tools hand back AIFF?
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Because it is built to be worked on rather than distributed. The format keeps quality and structure through repeated opens, edits and re-saves, which is what a production pipeline needs and what a delivery format explicitly trades away. The consequence is size: keep AIFF as the master and convert a copy for anyone who only needs to look at it.
Is AIFF being phased out?
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It is not going away abruptly, but its share of new files keeps shrinking and fewer new tools bother to support it. Existing files stay readable for a long time yet. The practical position is that keeping an archive in this format is fine, while starting a new workflow in it means accepting an increasingly narrow set of software.
Can an AIFF file carry a 5.1 surround mix?
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Yes — the format handles more than two channels properly, so a surround mix keeps its channel layout rather than being folded to stereo on the way in. Whether you hear it as surround depends on the far end: a receiver will decode all the channels, a phone will downmix at playback time regardless. Converting to a stereo-only format makes that fold permanent.
Does it matter that AIFF is over thirty years old?
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Age itself is not the problem — several formats from that era are still perfectly good, precisely because everything has had decades to implement them. What matters is what the era assumed: small files, modest processors, no network, and features nobody needed yet. Where those assumptions still fit, the format is fine. Where they do not, that is the reason to convert. AIFF is Apple’s Audio Interchange File Format from 1988, built on the same IFF chunk design as AVI’s RIFF.
Why will an AIFF file not play in my browser?
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Browsers decode a short, fixed list of audio formats and AIFF is outside it, so the file downloads instead of playing or the player simply reports an error. Desktop software with a wider codec set opens it without trouble. If the audio has to play on a web page, converting it is the fix — no player configuration will add a decoder the browser does not ship. AIFF is as large as WAV with worse support outside the Apple world, so it is a poor choice for distribution.
Do I need a Mac to work with AIFF files?
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No. The format came out of Apple and is what its devices and software produce by default, but the files themselves are ordinary and read fine elsewhere with the right tool. Converting here happens on the server, so no QuickTime install, no Apple hardware and no platform-specific codec pack is involved anywhere in the process.
What should I convert AIFF to for sharing?
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For email and social-media sharing, convert AIFF to MP3 — universal playback and small file size. For high-fidelity sharing with audiophiles, convert to FLAC or WAV to preserve the original quality.
How much will conversion change the file size?
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Converting AIFF to a lossless format like WAV or FLAC keeps the size large; converting to MP3 or AAC at common bitrates (192-320 kbps) shrinks the file by roughly 5-10x with minimal perceptible quality change.
