Convert M4A to FLAC Online
Convert M4A audio to FLAC instantly in your browser. Batch convert multiple files, adjust bitrate, and download - zero uploads, 100% private.
Drag & drop files, or browse
Up to 20 audio files at once
How to convert M4A to FLAC
Upload your files
Drag & drop or browse up to 20 M4A files at once.
Browser converts locally
FFmpeg (compiled to WebAssembly) converts to FLAC in your browser - nothing is uploaded anywhere.
Download results
Save files individually or download everything as a ZIP bundle.
Why use this converter
100% private
Your M4A files convert entirely in your browser - nothing is ever uploaded to a server.
Batch conversion
Convert multiple M4A files to FLAC at once, then download them all as a ZIP.
Won't add extra loss
FLAC is lossless, so this conversion won't degrade quality further - though it can't restore detail already lost when the source was encoded as M4A.
No file size limits
Since nothing uploads to a server, there's no artificial cap on how large a file you can convert.
Frequently asked questions
4 questionsYes - conversion happens locally in your browser using FFmpeg compiled to WebAssembly, so there's no per-file cost, watermark, or account required.