AIFF to FLAC Converter

Convert AIFF audio files to FLAC lossless format. Keep every bit of audio quality while cutting file sizes roughly in half. Move from Apple's lossless format to the universal open-source standard.

AIFFFLAC

Drop your AIFF file here or click to browse

AIFF (.aiff) · Max 20 MB

Free — 10-second preview, 5 conversions/month. Upgrade for unlimited

What is AIFF?

Apple's uncompressed format. Similar to WAV but with better metadata support. Used in professional Mac audio workflows.

What is FLAC?

Lossless compression. Perfect quality at roughly half the size of WAV. The choice for audiophiles and archiving.

Why Convert AIFF to FLAC?

AIFF to FLAC is the archival no-brainer: FLAC stores the identical audio in roughly half the space, losslessly. Unlike converting to MP3 or M4A, nothing whatsoever is discarded — FLAC is a compression format in the ZIP sense, not the MP3 sense, and decoding it reproduces the original PCM samples bit for bit. So a library of AIFF rips or session bounces eating 10 MB per minute becomes about 5-6 MB per minute of mathematically identical audio. For archiving that is the whole argument: half the disk, zero loss, plus better metadata in practice (FLAC tagging is consistently supported across players and taggers, while AIFF metadata handling outside Apple software is patchy) and built-in integrity checking — every FLAC file carries a checksum of the audio, so silent file corruption is detectable years later, something bare PCM formats cannot offer. The trade-offs are narrow: Apple's Music app does not play FLAC (convert those copies to ALAC or M4A instead — we have tools for both paths), and a handful of old pro-audio tools still prefer uncompressed input, which is why you keep the ability to decode back to AIFF or WAV at any time, losslessly. For long-term storage of masters and rips, FLAC is the format the archival world settled on. Conversion runs locally in your browser.

Who Uses This Converter

Halve your archive

A disk full of AIFF masters compresses ~2× with zero loss and full recoverability.

Integrity you can verify

FLAC's built-in checksums reveal silent file corruption — bare PCM cannot.

Better tagging

FLAC metadata works consistently across players and taggers; AIFF tags outside Apple software are hit-or-miss.

Always reversible

Decode back to AIFF or WAV any time, bit-identically, when a tool demands uncompressed input.

Frequently Asked Questions

Is there any quality loss converting AIFF to FLAC?

None at all. Both AIFF and FLAC are lossless. FLAC just stores the same audio data more efficiently through lossless compression. It's a bit-for-bit perfect conversion.

How much smaller are FLAC files than AIFF?

About 40-60% smaller. A 100MB AIFF file typically becomes 40-60MB as FLAC with absolutely no quality loss. The savings add up for large music libraries.

Can I convert back to AIFF if needed?

Yes, perfectly. Since both formats are lossless, you can convert back and forth without any quality degradation. The audio is identical in both formats.

Is FLAC really identical to the AIFF?

Bit for bit. FLAC is lossless compression — decoding reproduces the exact original samples, verified by a checksum stored in the file. It is compression in the ZIP sense, not the MP3 sense.

How much space do I save?

Typically 40-55% for music. Ten gigabytes of AIFF becomes roughly five of FLAC with mathematically identical audio.

Will FLAC play on my Apple devices?

Not in the Music app — Apple uses ALAC for lossless instead. Keep FLAC as your archive and convert copies for Apple playback, or use our FLAC to ALAC tool for a lossless Apple-native version.

Is this AIFF to FLAC converter free?

Yes. Free users get 5 conversions per month. The output is limited to the first 10 seconds as a preview, with a 20MB input file size limit. Upgrade to Pro for unlimited, full-length conversions.