Convert M4A to FLAC
Convert M4A files to FLAC for libraries and pipelines standardized on the open lossless format.
This conversion runs in this browser tab. The selected file is not uploaded for processing.
M4A to FLAC, step by step.
These steps describe the M4A input and the FLAC export for this exact route.
Upload M4A Files
Drag and drop your M4A files or click to browse. You can queue several at once.
Convert in Your Browser
The first run fetches the conversion engine (a one-time ~31MB download); after that, M4A to FLAC conversion happens entirely on your device — nothing is uploaded.
Download FLAC
Save the converted file right away. Multiple files are bundled into a ZIP for one-click download.
What to expect
What matters for FLAC output.
Review the behavior this M4A to FLAC tool is designed to preserve, expose, or simplify.
100% Private
All processing happens in your browser. Your files never leave your device.
Lossless Compression
FLAC shrinks audio to roughly half of WAV size while staying bit-perfect — decode it and you get the original samples back exactly.
One-Time Engine Download
The first conversion fetches a ~31MB audio engine; your browser caches it, and everything runs locally from then on.
Questions about M4A and FLAC.
Check the format behavior, limitations, and follow-up options before processing a real file.
The honest version first: FLAC can't restore what AAC encoding discarded — converting an M4A to FLAC produces a bigger file with identical sound. The reason to do it anyway is standardization: a music server, archival workflow, or toolchain that only accepts FLAC, or a collection you're consolidating into one format. The FLAC losslessly preserves the M4A's decoded audio from that point forward.
Related routes
Continue from FLAC.
Choose another format only when it matches the next job.
Next step
Ready to process another M4A file?
Start here again, or compare plans when the job needs server capacity, retention, or repeat automation.