Choose M4A audio
Add non-empty .m4a files no larger than 100 MB that host FFmpeg can read and that contain audio.
M4A to FLAC audio conversion
Turn eligible M4A audio into a new FLAC file.
Fileverses sends queued M4A files to its server-side FFmpeg profile one at a time, then provides an individually named FLAC download for each successful conversion.
- FLAC re-encode
- First audio stream
- 100 MB per file
Processed by our self-hosted conversion engine
Supported files
M4A in. Newly encoded FLAC out.
M4AFLAC
The fixed profile keeps only the first audio stream, removes video, metadata, and chapters, then writes a new FLAC file.
How it works
Make FLAC downloads from an M4A queue
Start the sequential queue
Each item is submitted to the fixed server-side profile in turn; it maps only the first audio stream.
Download each FLAC
Review a completed result where browser support permits, then save its separately named FLAC file.
What this route does
A new FLAC, not restored source detail.
FLAC preserves the samples decoded from the M4A input, but cannot recover detail lost in an earlier lossy encode. There are no audio-setting controls.
Convert M4A to FLACM4A with readable audio is required
This route accepts only non-empty .m4a uploads up to 100 MB. A file that FFmpeg cannot read or that has no audio cannot convert.
FLAC is newly encoded
The result is not a stream copy. It contains a new FLAC encoding of the first decoded audio stream, so output size can vary.
Video and source extras are excluded
The profile removes video, source metadata, and chapters. It does not retain alternate audio tracks, subtitles, or attachments.
No production controls
There are no trim, stream-selection, bitrate, channel, sample-rate, quality, or compression-setting controls on this route.
M4A to FLAC FAQ
M4A and FLAC questions
What M4A files work with this converter?+−
Use a non-empty .m4a file up to 100 MB that host FFmpeg can read and that contains an audio stream.
Does M4A to FLAC make the audio lossless again?+−
No. The output is lossless from the decoded M4A samples, but it cannot restore detail removed by an earlier lossy M4A encode.
Which audio track is used?+−
The fixed profile maps only the first audio stream. It does not offer alternate-track selection.
Does the FLAC keep video or tags?+−
No. Video is excluded and source metadata and chapters are removed before the new FLAC is written.
Can I convert multiple M4A files?+−
Yes. Files are handled sequentially, and every successful conversion has its own download.
Will the FLAC be smaller than the M4A?+−
There is no fixed size guarantee. A FLAC re-encode can be larger or smaller depending on the source.
Can I trim audio or change quality settings?+−
No. This route has no editing, sample-rate, channel, bitrate, quality, or compression controls.