Video conversion
Convert MP4 to FLAC
Updated Jul 2026
MP4 is a video container, and FLAC is an audio-only format that stores sound with no quality loss. To convert MP4 to FLAC, pull the audio track out of the video and save it in FLAC. Doing this on your own computer means the video file, and whatever's in it, never has to leave your machine.
- Extension
- .mp4
- Type
- Video
- Typically
- The universal video format
- Compression
- Lossy
- Extension
- .flac
- Type
- Audio
- Typically
- Lossless music
Convert MP4 to FLAC on your own computer. Nothing uploads.
How to convert MP4 to FLAC
- Open Morphjet and drag in the MP4 file or a whole folder of them.
- Choose FLAC as the output format. Morphjet extracts the audio track automatically.
- Convert. The FLAC file is written next to your original, and nothing leaves your machine.
MP4 vs FLAC: what actually changes
| MP4 | FLAC | |
|---|---|---|
| Contains video | Yes | No, only the audio track is kept |
| Audio quality | Lossy, compressed when the video was first encoded | Lossless, but it can't restore detail the MP4's audio already lost |
| File size | Small for the audio, since it's already compressed | Much larger for the same length of sound |
| Opens everywhere | Yes, plays on nearly anything | Supported by most music players and audio gear, though not always the default player on a phone |
| Metadata (title, artist) | Sometimes, depends on how the video was tagged | Yes, can carry the same tags |
When to convert, and when not to
Convert MP4 to FLAC when you want just the sound from a video, a recorded concert, a lecture, a screen recording with music, and you want it in a format built for audio players and lossless archiving rather than stuck inside a video file.
Skip it if the audio in your MP4 was already compressed at a low bitrate, because FLAC will faithfully preserve that same limited quality in a bigger file, it won't sound any better than the source.
Why not just use an online converter?
Video files often carry more than people realize, embedded audio, sometimes location or device data, and pulling that audio out through an online converter means uploading the whole video to a stranger's server first. Converting on your own computer means the MP4 and the sound inside it never travel anywhere. You can do it with your wifi off.
Questions
Will converting MP4 to FLAC make the audio sound better?
No. FLAC is lossless going forward, but it can't add back detail that was already compressed away when the MP4's audio was originally encoded. It preserves whatever quality is there, it doesn't improve it.
Do I lose the video when I convert to FLAC?
Yes. FLAC is audio only, so the picture is dropped and only the sound track is kept.
Does the FLAC file keep the title and artist information?
It can, if that information was already attached to the video. Morphjet carries over whatever tags it finds, but not every MP4 has them filled in.
Why convert to FLAC instead of a smaller audio format?
FLAC is the right choice when you want an exact, lossless copy of the audio, for archiving or further editing without adding another round of compression. If file size matters more than exactness, a compressed audio format is a better fit.
Can this be done without uploading the video anywhere?
Yes. Morphjet runs the whole conversion on your own computer, so the video and its audio stay local the entire time.
Morphjet converts MP4, FLAC, and 1,800+ other formats, all on your machine. Launching this July.