Convert your .aiff files to .mp3 format online. No software to install.
Pro plan required (from €4.99 / $4.99/month).
Drag and drop your .aiff file or click to browse.
Select MP3 as your output format.
Click Convert and download your .mp3 file.
AIFF preserves your audio at full quality, but the large file sizes make it impractical for sharing or mobile playback. Converting to MP3 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. MP3 (MPEG Audio Layer III, introduced in 1993) uses Lossy (psychoacoustic model + MDCT) compression. AIFF browser support: Limited (Safari; partial support in Chrome and Firefox). MP3 browser support: Universal.
Converting from AIFF (lossless) to MP3 (lossy) will reduce file size significantly, but some quality is permanently discarded during compression. At higher quality settings (80-90%), the visual or audible difference is typically imperceptible. At lower settings, compression artifacts may become noticeable. Always keep your original AIFF file as a master copy.
Typical AIFF file size: A 4-minute song at 44.1 kHz/16-bit stereo: ~40 MB. Typical MP3 file size: A 4-minute song at 192 kbps: ~5.5 MB; at 320 kbps: ~9.2 MB. Expect a dramatic file size reduction — often 5-20x smaller — when converting from uncompressed AIFF to MP3.
Use VBR (Variable Bitrate) encoding at V0 or V2 quality with the LAME encoder for the best quality-to-size ratio. VBR allocates more bits to complex passages and fewer to simple ones, producing better results than CBR at the same average bitrate.
Pro plan required (from €4.99 / $4.99/month). No watermarks.
Create a free account in 10 seconds and start converting immediately. No credit card required.
Your file is sent over an encrypted connection to our provider CloudConvert, which converts it and deletes it after the conversion, within 24 hours at most. Details in our Privacy Policy.
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 .mp3 file maintains the best possible quality. No unnecessary compression or quality loss.
Audio conversion requires a Pro account. See pricing, from €4.99 / $4.99/month
No. Audio conversions need a Pro plan (from €4.99 / $4.99/month), with 100 audio or 20 video conversions a month.
It depends on the file size and on the queue at our provider. Small files usually take a few seconds.
Your file is sent over an encrypted connection to our provider CloudConvert, which converts it and deletes it after the conversion, within 24 hours at most. Details in our Privacy Policy.
Free users can convert files up to 10 MB. Pro users can convert files up to 500 MB.