Convert your .aiff files to .m4a format online for free. No software to install. Fast, secure, and easy.
Pro account required for audio & video
Drag and drop your .aiff file or click to browse.
Select M4A as your output format.
Click Convert and download your .m4a file.
AIFF preserves your audio at full quality, but the large file sizes make it impractical for sharing or mobile playback. Converting to M4A compresses the audio to a fraction of the size while maintaining quality that is good enough for everyday listening.
AIFF (Audio Interchange File Format, introduced in 1988) uses None (PCM); AIFF-C supports compressed variants compression. M4A (MPEG-4 Audio, introduced in 2001) uses AAC (lossy) or ALAC (lossless) within MPEG-4 container compression. AIFF browser support: Limited (Safari; partial support in Chrome and Firefox). M4A browser support: All modern browsers (via AAC codec support).
The quality impact depends on the specific settings used during conversion. M4A preserves full quality with lossless compression.
Typical AIFF file size: A 4-minute song at 44.1 kHz/16-bit stereo: ~40 MB. Typical M4A file size: A 4-minute song at 256 kbps AAC: ~7.3 MB; ALAC: ~25-35 MB. Expect a dramatic file size reduction — often 5-20x smaller — when converting from uncompressed AIFF to M4A.
For the best conversion results, always start from the highest quality source file available. Converting from a previously compressed file compounds any existing compression artifacts. When in doubt, use higher quality settings — you can always re-convert at lower quality later, but you cannot recover quality that has been lost.
Convert AIFF to M4A with 3 free conversions per day. No hidden fees.
Create a free account in 10 seconds and start converting immediately. No credit card required.
Files are encrypted during transfer, processed on secure servers, and deleted immediately after conversion.
Convert files from any device — desktop, tablet, or phone. No software to install, works in any modern browser.
SquishConvert supports over 358 file conversion combinations across images, documents, audio, and video.
Your converted .m4a file maintains the best possible quality. No unnecessary compression or quality loss.
Audio conversion requires a Pro account. See pricing — starting at $4.99/month
You get 3 free conversions per day. Audio conversions require a Pro account.
Most files convert in under 10 seconds. Larger files may take a bit longer depending on size.
Yes. Files are encrypted during transfer, processed on secure servers, and deleted immediately after conversion. We never store your files.
Currently, SquishConvert converts one file at a time. Batch conversion is coming soon — stay tuned!
Free users can convert files up to 10 MB. Pro users can convert files up to 500 MB.