MP4 Converter

Convert MP4 files — videos too — to MP3, WAV, FLAC and more in your browser — nothing is uploaded.

MP3, WAV, FLAC, M4A, M4B, MP4, AAC, OGA or WEBA, one or many. Drop them here or paste with ⌘V / Ctrl+V. Choose what each becomes on its row.

Runs on your device. Files are read and converted in your browser and aren't uploaded.

MP4

Lossy
AAC
Video container

Usually a video, most often with AAC sound. For audio, only the sound matters: you can take it out of an MP4 (or a MOV or M4V), or make an audio-only MP4 that plays wherever videos do.

Learn more about MP4 files

An MP4 is lossy. Into WAV and FLAC its sound is kept exactly as it is now, in a bigger file (it can't get back what was lost); into another lossy format it's encoded again, so choose a bitrate at least as high as the original's.

Into M4A, M4B and AAC its AAC sound is copied as is when it can be — no re-encoding, no quality lost, and no encoder needed, so it works in Firefox too.
From a video only the sound is taken; the picture is left out. MOV and M4V videos are read the same way.
MP4 files can be up to 2 GB.
Making M4A, MP4, M4B or AAC needs the browser's AAC encoder (Chrome, Edge and Safari — not Firefox yet); OGA and WEBA its Opus encoder; MP3, WAV and FLAC are made in any modern browser.

How to do it

Choose your MP4 files, or drop them on the page — as many as you like.
Each starts as an MP3; pick another format for every file with Convert to in Settings, or for one file on its row.
Convert all, then download each file, or all of them in one .zip.