Convert AIF to AIFF — Free Online Converter

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.