Convert your .aiff files to .flac 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 FLAC as your output format.
Click Convert and download your .flac file.
Converting AIFF to FLAC changes the container or codec while preserving full audio quality. This is useful when your target device or application requires a specific audio format.
AIFF (Audio Interchange File Format, introduced in 1988) uses None (PCM); AIFF-C supports compressed variants compression. FLAC (Free Lossless Audio Codec, introduced in 2001) uses Lossless (linear prediction + Rice coding) compression. AIFF browser support: Limited (Safari; partial support in Chrome and Firefox). FLAC browser support: All modern browsers (Chrome, Firefox, Edge; Safari 11+).
Both AIFF and FLAC use lossless compression. The conversion preserves 100% of the original data — the output file is pixel-for-pixel (or sample-for-sample) identical to the input. No quality is lost during this conversion.
Typical AIFF file size: A 4-minute song at 44.1 kHz/16-bit stereo: ~40 MB. Typical FLAC file size: A 4-minute song at 44.1 kHz/16-bit: ~20-30 MB. Expect a dramatic file size reduction — often 5-20x smaller — when converting from uncompressed AIFF to FLAC.
FLAC compression level (0-8) only affects encoding speed and file size, not audio quality — all levels produce bit-identical audio. Level 5 is a good default balance. Levels 6-8 save marginal space at significantly slower encoding speeds.
Convert AIFF to FLAC 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 .flac 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.