About AIFF Files
AIFF Audio
AIFF is Apple's uncompressed audio format, equivalent to WAV in the macOS ecosystem. It stores CD-quality PCM audio and is widely used in professional audio production on Apple hardware.
Family
Audio Files
Extension
.aiff
MIME Type
audio/aiff, audio/x-aiff
Can Use As
41 49 46 46 00 01 00 00 4B 41 49 4A
ASCII: AIFF....KAIJ
📈 Target Minimum File Size (Guaranteed ≥ KB)
Lossless JPEG Q100 + standard COM segment padding for government & exam portals
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HOW AIFF CAME TO BE.
AIFF — Audio Interchange File Format — shipped with Apple’s Audio IFF specification in 1988, based on Electronic Arts’ Interchange File Format (IFF). The goal matched WAV’s on Windows: a simple uncompressed container for studio-quality audio. AIFF stores PCM samples in big-endian order (because it came from the 68000-era Macintosh) while WAV stores them little-endian (Intel x86). That’s the only meaningful difference between the two.
AIFF was the native audio format of classic Mac OS and remains ubiquitous in professional audio workflows on macOS. Pro Tools, Logic Pro, and most audio-for-video pipelines accept AIFF without conversion. A compressed variant, AIFF-C, allows codecs like IMA ADPCM or MACE, but in practice "AIFF" almost always means uncompressed PCM.
Technical Specifications
- MIME types
- audio/aiff, audio/x-aiff
- Extensions
- .aif, .aiff, .aifc
- Byte order
- Big-endian
- Max bit depth
- 32 bits (PCM or float)
- Max sample rate
- 192 kHz (practical); unlimited (spec)
Typical Sizes & Weights
3-min song (CD quality)
30 MB
3-min song (24-bit / 96 kHz)
100 MB
Full album (CD, 10 tracks)
450 MB
STRENGTHS & LIMITATIONS.
Strengths
- Lossless and uncompressed — bit-exact audio reproduction.
- Native to macOS and all Apple Pro Audio apps.
- Simple structure — trivially parsed by audio libraries.
- Supports up to 32-bit float, 192 kHz, and multi-channel audio.
- Rich metadata via named chunks (annotations, markers, MIDI).
Limitations
- Enormous file sizes — 10 MB per minute at CD quality.
- No built-in compression — use FLAC for lossless with smaller files.
- Big-endian byte order confuses tools written on little-endian hardware.
- Less common on Windows; WAV is the local equivalent.
CURIOSITIES & TRIVIA.
AIFF and WAV store the same data — the only difference is byte order (AIFF is big-endian, WAV is little-endian).
AIFF descends from Electronic Arts' Interchange File Format, used in 1985 for Amiga IFF graphics.
Pro Tools and Logic Pro prefer AIFF over WAV because classic Macs were big-endian.
AIFF files carry four-character "chunk IDs" like SSND (sound data) and COMM (common info) readable in a hex editor.
The compressed variant AIFF-C is so rare that most audio software treats "AIFF" as a synonym for uncompressed PCM.
Specialized Utilities for .AIFF Files
MP3 Audio Compressor — Reduce MP3 File Size
Compress MP3, WAV, M4A, and FLAC audio files by adjusting bitrate (64k, 96k, 128k, 192k), sample rate, and mono/stereo channels.
Online Audio Cutter & Trimmer
Trim MP3, WAV, FLAC, M4A, and OGG audio tracks to exact start and end timestamps with built-in browser playback and custom bitrate.
Extract Audio from Video
Extract the audio track from any video file and save it as MP3, WAV, or other audio formats. Perfect for creating podcasts, music rips, or voice-only recordings.
Video to MP3 Audio Extractor
Extract high-bitrate MP3 audio tracks from MP4, MOV, MKV, AVI, and WebM video recordings in seconds—ideal for podcasts, lectures, and interviews.
CONVERT FROM AIFF
CONVERT TO AIFF
Common Use Cases
Mac audio production, music mastering, professional editing.
Related Formats
Popular comparisons
AIFF vs MP3
Differences, file size, and when to choose each format.
AIFF vs WAV
Differences, file size, and when to choose each format.
AIFF vs FLAC
Differences, file size, and when to choose each format.
AIFF vs AAC
Differences, file size, and when to choose each format.
AIFF vs M4A
Differences, file size, and when to choose each format.
AIFF vs OGG
Differences, file size, and when to choose each format.
Popular AIFF conversions
The most-requested destinations when starting from AIFF.
Frequently Asked Questions
AIFF (AIFF Audio) is an audio file format used to store sound recordings — music, voice, podcasts, sound effects. The format defines how the audio samples are compressed (or stored raw), what bitrates are supported, and how metadata such as title, artist, album, and cover art is embedded. It is part of the audio files family.
VLC, foobar2000, and the default media players on Windows and macOS handle AIFF natively. On mobile, iOS Music and Android media apps vary in their support — popular formats work everywhere; niche ones may need a dedicated app. If playback fails on a device, converting to MP3 or AAC usually solves it.
Upload the AIFF to KaijuConverter and pick MP3, WAV, FLAC, AAC, OGG, or any other target. Our FFmpeg pipeline decodes the audio and re-encodes to the target format at sensible default bitrates (VBR ~190 kbps for music, 96 kbps for speech). Metadata and cover art travel with the audio where both formats support them.
AIFF can be lossy or lossless depending on the specific variant. Lossy variants (smaller files) discard some audio detail during compression in ways tuned to be inaudible; lossless variants preserve every sample exactly but produce larger files. For distribution, lossy at high bitrate is standard; for archival, lossless wins.
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