MP4 to FLAC: extract audio
Pull the soundtrack out of a MP4 video and save it as FLAC. Your video stays on your device: nothing is uploaded.
How to convert MP4 to FLAC
- Add your MP4 files. Drop one or more .mp4 files on the box above, or tap it to pick them from your device.
- Let it convert. The first video you convert loads the converter once (about 31 MB, then cached). After that it runs on your device; a progress bar shows how far along it is.
- Download the FLAC. Press Download next to each file. Nothing was sent to a server, so close the tab and it's gone.
What is a MP4 file?
MP4 with H.264 video and AAC sound is the most compatible video format there is. It plays on every phone, TV, browser and editing app and is what social networks expect.
What is FLAC?
FLAC is lossless compressed audio: the same sound as a CD or studio master at roughly half the size of WAV.
Why convert MP4 to FLAC?
MP4 is great for playing and uploading everywhere, but slightly larger than modern codecs like VP9 or AV1 at the same quality. FLAC is the better choice for hi-fi music libraries and archiving; keep in mind files are large and many phones, cars and apps don't play FLAC.
Will I lose quality?
No. FLAC is lossless, so every pixel that MP4 gave us is kept exactly.
Private by design
Most online converters upload your file to their servers. This one doesn't: the converter itself is loaded into your browser and works offline from there, so your videos never leave your phone or computer.
Questions
Is this MP4 to FLAC converter free?
Yes, completely free, with no sign-up, no watermark and no daily limit.
Are my MP4 files uploaded?
No. The conversion happens inside your browser on your own device. Nothing is sent to us or anyone else.
Can I convert MP4 to FLAC on iPhone or Android?
Yes, in a modern browser. Phones are slower than computers for video, and very long videos can run out of memory on older phones.
Can I convert several files at once?
Yes. Drop as many as you like; they are converted one after another and each gets its own download button.
Is there a file size limit?
No fixed limit, but your browser has to hold the whole file in memory, so files over about 2 GB may fail.