Convert M4A to AIFF Online
The .m4a extension confuses users since it can contain either lossy AAC or lossless ALAC — file size varies wildly depending on codec. Converting to AIFF gives you a key advantage: stores uncompressed pcm audio with rich metadata (artwork, lyrics, comments) in one file — something wav historically lacked. AIFF is best for uncompressed audio on macos with embedded metadata — apple's equivalent of wav.
Why Convert M4A to AIFF?
The .m4a extension confuses users since it can contain either lossy AAC or lossless ALAC — file size varies wildly depending on codec — converting to AIFF overcomes this by providing stores uncompressed pcm audio with rich metadata (artwork, lyrics, comments) in one file — something wav historically lacked
AIFF is the right choice when you need to: exchanging uncompressed audio between macos-based music production tools
Gain broader compatibility — AIFF works with macOS (native), Logic Pro, GarageBand, Pro Tools, VLC, most DAWs; Windows support via third-party players
Your M4A files were created for storing apple lossless (alac) rips of cd collections in m4a containers, but now you need a format suited to different workflows
M4A vs AIFF — Format Comparison
MPEG-4 Audio (.m4a)
Audio Interchange File Format (.aiff)
How to Convert M4A to AIFF
Upload your M4A file
Drag your .m4a file onto the upload area or click to browse. We accept M4A files up to 200 MB.
Choose AIFF as output format
Select .aiff (Audio Interchange File Format) from the format list. AIFF uses lossless encoding, so your output quality matches the source.
Convert and download
Click Convert and wait for processing. Your AIFF file will be ready to download in seconds. The result is optimized for uncompressed audio on macos with embedded metadata — apple's equivalent of wav.
Frequently Asked Questions
Is the M4A to AIFF conversion lossless?
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When both formats support lossless data, the conversion preserves all content. Uncompressed PCM, up to 32-bit / 192 kHz, with embedded metadata chunks for album art and tags.
How large will my AIFF file be compared to the original M4A?
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M4A files are typically 3 MB – 40 MB per song, while AIFF files are typically 10 MB – 100 MB per minute. The actual size depends on content complexity and any quality settings you choose.
What software can open the converted AIFF file?
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AIFF is compatible with: macOS (native), Logic Pro, GarageBand, Pro Tools, VLC, most DAWs; Windows support via third-party players.
What is the maximum file size I can convert?
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PureConverter accepts M4A files up to 200 MB. Your files are processed securely and deleted from our servers after conversion.
What's the difference between M4A and AIFF?
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M4A (MPEG-4 Audio) is best for storing music and audio purchased from itunes or ripped from cds in the apple ecosystem. AIFF (Audio Interchange File Format) is best for uncompressed audio on macos with embedded metadata — apple's equivalent of wav. Key tradeoff: M4A's advantage is supports both lossy aac and lossless alac in one container — apple's universal audio format for music and audiobooks, while AIFF's advantage is stores uncompressed pcm audio with rich metadata (artwork, lyrics, comments) in one file — something wav historically lacked.
Pro Tips for M4A to AIFF Conversion
AIFF preserves full quality, so your output file will be as good as the M4A source — no need to worry about compression artifacts
Keep a backup of your original M4A file — while our conversion is reliable, having the source is always recommended
AIFF works especially well for: archiving studio masters on macos where wav metadata support was historically poor
Did you know? AIFF was based on Electronic Arts' IFF (Interchange File Format) from the Amiga — Apple adapted the Amiga's file structure for Macintosh audio, which is why AIFF uses big-endian byte order while WAV uses little-endian.
Ready to Convert?
Upload your M4A file above and get your AIFF in seconds. Free, fast, and secure.