Convert MP4 to FLAC.
Pull the soundtrack out of an MP4 video as FLAC, with no further loss, for editing, archiving or a FLAC library.
A clean copy of the sound
For a concert recording, an interview or a music video, FLAC keeps the soundtrack exactly as the video carries it, without the second loss an MP3 would add.
Surround stays surround
A 5.1 soundtrack keeps all six channels in the FLAC.
Size change
The FLAC is several times larger than the video's compressed soundtrack, because it stores every decoded sample, but usually far smaller than the whole video.
How it works
- 01
Upload your MP4
Drop a file or pick one from your device. Private by default.
- 02
Extract with ffmpeg
ffmpeg drops the picture, decodes the soundtrack and stores it losslessly as FLAC.
- 03
Download
Grab your FLAC.
Lossless FLAC of the decoded soundtrack
Keeps the original sample rate and channels
Private uploads, auto-deleted after 1 hour
No watermark, no signup to try
Open-source ffmpeg engine
Extracting FLAC from MP4
This pulls the audio track out of your MP4 and encodes it as FLAC; the video is discarded. FLAC is lossless, so the audio is kept faithfully.
Need more than a conversion?
Send your audio or video to TranscriptAI to generate a transcript, summary, structured notes, flashcards, quiz questions or action items: automatically.
Common questions
Is it free?+
Yes. Convert MP4 to FLAC free. No signup and no watermark. Free covers 10 server conversions a day, up to 100 MB a file. Pro removes the daily limit and raises the file limit to 2 GB.
Is my file private?+
Your file is uploaded to a private bucket, converted on our own engine, and auto-deleted after 1 hour. It is never sent to a third-party converter.
Will it sound better than the video?+
No. Most MP4 soundtracks are AAC, which is lossy. FLAC keeps exactly what that track decodes to, with no further loss, but cannot add detail.
FLAC or WAV?+
Both are lossless and sound identical. FLAC is about half the size of a WAV. Choose MP4 to WAV if your editor does not open FLAC.
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