Convert M4A to FLAC 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 FLAC gives you a key advantage: lossless compression reduces file sizes by 40–60% while guaranteeing bit-perfect reconstruction of the original audio. FLAC is best for archiving music collections at cd quality with ~50% file size reduction and bit-perfect playback.
Why Convert M4A to FLAC?
The .m4a extension confuses users since it can contain either lossy AAC or lossless ALAC — file size varies wildly depending on codec — converting to FLAC overcomes this by providing lossless compression reduces file sizes by 40–60% while guaranteeing bit-perfect reconstruction of the original audio
FLAC is the right choice when you need to: building audiophile music libraries with verifiable bit-perfect quality
Gain broader compatibility — FLAC works with Foobar2000, VLC, Spotify (internal), Tidal, Amazon Music HD, Android, macOS (since Ventura), most modern devices
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 FLAC — Format Comparison
MPEG-4 Audio (.m4a)
Free Lossless Audio Codec (.flac)
How to Convert M4A to FLAC
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 FLAC as output format
Select .flac (Free Lossless Audio Codec) from the format list. FLAC uses lossless compression, so your output quality matches the source.
Convert and download
Click Convert and wait for processing. Your FLAC file will be ready to download in seconds. The result is optimized for archiving music collections at cd quality with ~50% file size reduction and bit-perfect playback.
Frequently Asked Questions
Is the M4A to FLAC conversion lossless?
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When both formats support lossless data, the conversion preserves all content. Bit-perfect lossless; supports up to 32-bit / 655 kHz, surround sound, and embedded metadata.
How large will my FLAC file be compared to the original M4A?
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M4A files are typically 3 MB – 40 MB per song, while FLAC files are typically 15 MB – 50 MB per song. The actual size depends on content complexity and any quality settings you choose.
What software can open the converted FLAC file?
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FLAC is compatible with: Foobar2000, VLC, Spotify (internal), Tidal, Amazon Music HD, Android, macOS (since Ventura), most modern devices.
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 FLAC?
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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. FLAC (Free Lossless Audio Codec) is best for archiving music collections at cd quality with ~50% file size reduction and bit-perfect playback. 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 FLAC's advantage is lossless compression reduces file sizes by 40–60% while guaranteeing bit-perfect reconstruction of the original audio.
Pro Tips for M4A to FLAC Conversion
FLAC 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
FLAC works especially well for: distributing high-resolution studio masters through services like bandcamp and qobuz
Did you know? Every FLAC file contains an embedded MD5 checksum of the original audio — you can verify at any time that your file hasn't been corrupted and is truly lossless, something no other audio format offers natively.
Ready to Convert?
Upload your M4A file above and get your FLAC in seconds. Free, fast, and secure.