Convert M4A to FLAC
Convert your M4A into FLAC, a lossless format with room for full tags and cover art. It keeps exactly what the M4A holds, bit for bit, while staying far smaller than the same audio saved as WAV, all inside your browser.
Why convert M4A to FLAC?
FLAC is the go-to format for music libraries and archiving. It carries rich metadata (artist, album, track numbers) plus embedded cover art, which keeps things tidy in players like foobar2000, VLC, and most hi-fi streamers. People convert M4A to FLAC to fold iTunes and Apple Music downloads, plus voice memos, into one consistent lossless collection without the bulk of WAV. FLAC is widely supported now, though some older car head units and certain Apple apps still lack native playback, so check your target device first. For a home library you want organized and future-proof, FLAC is a natural fit.
Quality and file size
FLAC is lossless, but that word describes what it does to the source you feed it, not the history of that source. Your M4A is already lossy AAC, so FLAC preserves it exactly as it stands and cannot add back anything the AAC encode discarded. The win over WAV is size: FLAC compresses losslessly to roughly 50 to 60 percent, with identical audio and better tagging. Compared to the original M4A the FLAC will be larger, because AAC compresses far more aggressively. Choose FLAC for a clean, well-tagged archive, not as a way to enhance the sound.
M4A to FLAC: common questions
Will FLAC make my M4A sound better?
No. FLAC preserves the M4A exactly as it is and cannot recover detail the lossy AAC encode already removed. It is about lossless storage and tags, not quality gains.
Is FLAC smaller than WAV?
Yes. FLAC compresses losslessly to about 50 to 60 percent of a WAV's size while holding identical audio. Compared to your original M4A, though, the FLAC will be larger.
Does my music get uploaded anywhere?
No. The conversion runs in your browser using FFmpeg compiled to WebAssembly. Your file never leaves your device, and we do not store, see, or train on it.
Will FLAC play on all my devices?
Most modern players and phones handle FLAC, including VLC and foobar2000. Some older car stereos and a few Apple apps still do not, so confirm support before converting a whole library.
Who makes this?
We're the small team behind Xport Studio, a private, fully offline app for AI vocals, stems, and mastering. These free tools are side experiments we wanted to share. No upsell, but if you're curious about the bigger thing, take a look.