Convert M4A to FLAC
Apple audio, preserved in the open lossless format — converted on your own device.
Drop your video or audio here
or
MP4, MOV, WebM, MKV, AVI, MP3, WAV and more — any size, no upload
🔒 Files never leave your device — everything runs in your browser.
M4A lives comfortably inside the Apple world and awkwardly outside it; FLAC is the reverse — the open ecosystem's standard for lossless audio, with tagging, checksums, and universal support in audiophile and archival software. This conversion carries recordings from one world into the other.
Plain truth about quality: a typical M4A is lossy AAC, and FLAC preserves exactly what it contains — no further loss, and no restoration of what AAC compression already spent. The decode and FLAC encode run entirely in your browser; voice memos and music never upload anywhere.
How it works
- Drop your file
Any common format, any size. Nothing is uploaded — the tool runs in your browser.
- Convert
Compatible files are repackaged instantly with zero quality loss; others are hardware-transcoded at high quality.
- Download
Your converted file is ready on your device — nothing to wait for, nothing to delete from a server.
Frequently asked questions
Does M4A to FLAC improve the audio?
No — FLAC preserves the M4A's content exactly, without adding new loss. If the M4A was lossy AAC (nearly all are), its earlier losses are permanent; the FLAC simply stops the erosion there.
When is this conversion the right move?
When a FLAC-only tool or library sits at the destination: archival software, DJ systems, open-source audio pipelines, or a collection standardized on FLAC. The conversion is about compatibility, not enhancement.
Are my voice memos private during conversion?
Entirely — the file is processed in your browser on your own device. No upload, no server, no copies anywhere.
Is my file uploaded to a server?
No. ConvertUno runs entirely in your browser on your own device. Your file never leaves your computer or phone — there is no upload at all.
Is it really free, with no watermark?
Yes. Processing happens on your device, so serving you costs us almost nothing — no watermark, no account, no file-size limit, no daily quota.