Convert Audio Interchange File Format (.aif) to Audio Interchange File Format (.aiff) online for free. Fast, secure audio conversion with no watermarks or registration.
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AIF and AIFF are two extensions for the same Audio Interchange File Format, developed by Apple in 1988 based on Electronic Arts' IFF structure. Both store uncompressed PCM audio in big-endian byte order with identical internal container structure. The .aif extension is the three-character variant that emerged for compatibility with classic Mac OS, Windows 8.3 file naming, and early CD-ROM file systems that restricted extension length.
Converting AIF to AIFF is essentially a container rename — the audio data, sample format, byte order, and metadata remain identical. This operation is useful when software or workflows specifically require the four-character .aiff extension for proper file type recognition.
Some professional audio applications and DAWs (Digital Audio Workstations) associate specifically with the .aiff extension rather than .aif. Logic Pro, GarageBand, and certain Pro Tools configurations may handle .aiff more consistently in project imports and batch processing. Renaming the extension alone sometimes works, but a proper container pass ensures any header differences are normalized.
Institutional and archival workflows often mandate the full .aiff extension in their file naming standards. Broadcasting organizations, music libraries, and sample pack distributors may reject .aif submissions that do not match their exact format specification strings. Converting through FFmpeg guarantees a valid, standards-compliant AIFF file.
FFmpeg reads the AIF container, identifies the big-endian PCM audio stream and any metadata chunks (MARK, COMM, SSND), and writes them into a fresh AIFF container with the .aiff extension. Since both formats use the identical AIFF specification internally, the PCM audio data is copied without any transcoding — a pure stream copy (codec copy) operation. This is effectively a zero-loss remux that completes nearly instantly regardless of file duration.
There is absolutely zero quality loss in AIF to AIFF conversion. Both extensions represent the same AIFF container format with identical PCM encoding, bit depth, sample rate, and big-endian byte order. The audio data is stream-copied bit-for-bit. The output file will be identical in audio content to the input.
| Device | AIF | AIFF |
|---|---|---|
| Windows PC | Partial | Partial |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Partial | Partial |
| Linux | Partial | Partial |
| Web Browser | No |
Resolution: N/A
Bitrate: 320 kbps
OGG Vorbis preferred
Resolution: N/A
Bitrate: 256 kbps
AAC format required
Resolution: N/A
Bitrate: 128 kbps
Lossless FLAC/WAV for best quality
Resolution: N/A
Bitrate: 128 kbps
MP3 mono for spoken word
AIF to AIFF is a lossless remux that normalizes the file extension without touching the audio data. Use it when workflows or systems require the full four-character .aiff extension.
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| No |
| Tính năng | AIF | AIFF |
|---|---|---|
| Tên đầy đủ | Audio Interchange File Format | Audio Interchange File Format |
| Phần mở rộng | .aif | .aiff |
| Phù hợp nhất cho | Lossless quality | Lossless quality |