AIFF to AAC — No Signup Required
Convert AIFF to AAC without handing over your email. No account. No newsletter. No "verify your inbox" step. Open the page, drop your file, done.
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AIFF (.aiff) · Max 20 MB
Most converter sites force you to create an account before converting. It's a growth hack, not a feature. AudioUtils skips all that. The converter works immediately.
Free users get 5 conversions per month without any account. Need more? Pro accounts exist but are never required for basic use.
Your privacy matters. No signup means no tracking profile tied to your conversions. No email list. No data to breach. AIFF is lossless. Converting to AAC reduces file size at the cost of some audio data. Use a high bitrate to minimize loss.
Frequently Asked Questions
Why is AIFF so much larger than AAC?
AIFF stores raw uncompressed PCM — every audio sample, no compression. CD-quality stereo AIFF is ~10 MB per minute. AAC at 256 kbps is ~2 MB per minute, achieved by discarding audio data the psychoacoustic model considers inaudible. The size ratio is typically 5–8× smaller for AAC versus AIFF, with no audible difference at high bitrates.
What AAC bitrate should I pick from an AIFF master?
256 kbps for archival quality — Apple Music's stream rate, transparent on almost any music. 192 kbps for everyday listening. 128 kbps for voice and audiobooks. Going from a clean AIFF source means even 192 kbps AAC sounds excellent because there's no noise floor or artifact stack to compound.
Is the output .aac or .m4a?
Our output is .m4a — AAC audio in an MP4 container, which is what iTunes, Apple Music, and iPhone expect. Drop the .m4a directly into iTunes or your Music app.
Will GarageBand and Logic Pro project metadata transfer?
Track-level metadata (title, artist, year if you set them in the AIFF) transfers to the M4A. Project-level information (BPM, key, marker positions) does not — that's session metadata, not file metadata.
Should I use ALAC instead?
Use ALAC (Apple Lossless) if you want to keep AIFF's lossless quality but in a smaller, Apple-friendly container. ALAC is roughly half the size of AIFF with bit-perfect quality preservation. Use AAC when file size matters more than perfect quality — which is true for portable use on most listeners.
Will the conversion work for AIFF-C or compressed AIFF?
Yes. AIFF-C is the variant container that can hold compressed audio (rare these days). Our converter detects the variant and decodes accordingly. Standard AIFF (uncompressed PCM) is the common case and converts directly.
About AIFF
Apple's uncompressed format. Similar to WAV but with better metadata support. Used in professional Mac audio workflows.
About AAC
Advanced Audio Coding. Successor to MP3 with improved compression. Widely used in streaming services.