AIF Compressor

How to Compress AIF Audio Online

1. Upload Your AIF Files — Drag and drop or select one or more AIF or AIFF audio files (both extensions are accepted).
2. Choose an Audio Codec — AIF is an uncompressed format. To reduce file size, the compressor re-encodes using a smaller codec. The default for AIF compression is PCM mu-law (significant size reduction while staying in the AIF container). Other options include PCM A-law, PCM 16-bit Big Endian, and PCM 16-bit Little Endian.
3. Adjust Audio Settings (Optional) — Change the Audio Channel to Mono (halves the file size of a stereo recording) or set a specific Sample Rate (8000 Hz, 12000 Hz, 16000 Hz, 24000 Hz, 44100 Hz, or 48000 Hz). Lowering from 44100 Hz to 22050 Hz or 16000 Hz reduces size further.
4. Trim (Optional) — Set a start time and duration in seconds or HH:MM:SS.sss to extract only the segment you need.
5. Compress & Download — Click Compress and download the smaller AIF file.

Why Compress AIF Files?

AIF (Audio Interchange File Format) stores uncompressed PCM audio — roughly 10 MB per minute at CD quality (44.1 kHz, 16-bit, stereo). A 4-minute song is about 40 MB, and a full album can exceed 500 MB. Compressing AIF files is essential when you need to share recordings via email, upload to platforms with size limits, or free up storage on your Mac. Because AIF is Apple's native uncompressed format, many producers and musicians accumulate large AIF libraries from Logic Pro, GarageBand, and Pro Tools sessions.

AIF File Size by Settings

AIF vs Other Uncompressed Formats

Use Cases

• Logic Pro / GarageBand exports — Compress session bounces from 40+ MB down to a shareable size without leaving the AIF format.
• Email & messaging — Reduce AIF files below 10–25 MB email attachment limits by switching to mu-law encoding and/or lowering the sample rate.
• Voice recordings — Spoken-word AIF files don't need 44.1 kHz stereo. Downsampling to 16000 Hz mono with mu-law encoding cuts size by ~90%.
• Archival with size constraints — When you must keep the AIF container (e.g., for legacy system compatibility), codec and sample rate changes offer meaningful reduction without format conversion.

Why are AIF files so large?

AIF stores raw, uncompressed PCM audio data. Every sample is preserved at full precision, which means CD-quality audio (44.1 kHz, 16-bit, stereo) uses about 1.4 Mbps — roughly 10 MB per minute. There is no compression applied by default.

What is PCM mu-law encoding?

PCM mu-law is a companding algorithm that reduces 16-bit audio to 8-bit by applying a logarithmic curve. It roughly halves the file size while preserving speech intelligibility well. It is widely used in telephony and is the default codec for AIF compression on XConvert.

Will compressing AIF reduce audio quality?

Switching from 16-bit PCM to mu-law encoding introduces some quality loss, primarily in dynamic range. For speech and casual listening, the difference is negligible. For critical music production, consider converting to FLAC instead, which is lossless.

Can I convert AIF to a smaller format instead?

Yes. If you don't need to stay in the AIF container, converting to MP3 (lossy, ~90% smaller) or FLAC (lossless, ~50% smaller) is more effective. Use the AIF to MP3 or AIF to FLAC converters.

What is the difference between AIF and AIFF?

They are the same format. AIF is the shortened file extension commonly used on macOS; AIFF (Audio Interchange File Format) is the full name. XConvert accepts both .aif and .aiff files.