How do I know if my M4A holds ALAC or AAC?

Check the codec details in a player like VLC, or judge by origin: iTunes Store purchases and streaming downloads are AAC, while CDs ripped with the Apple Lossless setting are ALAC. It matters because ALAC converts to FLAC losslessly; AAC gains nothing from the move.

Is ALAC to FLAC really lossless in both directions?

Yes — both codecs store identical PCM data, just compressed differently, so converting between them any number of times never alters the audio. It's a codec swap for ecosystem reasons: FLAC for the open world, ALAC for Apple's.

Why convert voice memos to FLAC before editing?

Voice Memos records lossy AAC, and each edit-and-export cycle in a lossy format compresses the audio again. Moving the memo to FLAC first means later processing — trimming, noise cleanup, transcription prep — adds zero further degradation.

M4A to FLAC Converter – Free & Online

Convert M4A to FLAC

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Moving audio from M4A to FLAC frees it from Apple's container into the open lossless format the rest of the audio world standardizes on. Whether the move is truly lossless depends entirely on what the M4A holds inside.

Convert M4A to FLAC – Free Online M4A to FLAC Converter

Why convert M4A to FLAC?

Migrate Apple Lossless (ALAC) purchases and rips to FLAC for Plex, foobar2000, Android, and Linux players.
Prepare voice memos or music for lossless-only editing and analysis pipelines.
Escape ecosystem lock-in with a format every non-Apple library manager tags and verifies natively.

Tip: Check what's inside the M4A first: ALAC converts to FLAC with zero loss, while an AAC-based M4A just produces a large FLAC with the same lossy audio inside.

How to convert M4A to FLAC

Upload your M4A file using the area above.
FLAC is preselected as the target format.
Click Start and wait for the conversion to finish.
Download your converted FLAC file.

Convert M4A to FLAC

Convert M4A to FLAC – Free Online M4A to FLAC Converter

Why convert M4A to FLAC?

How to convert M4A to FLAC

M4A to FLAC — Frequently Asked Questions