FileTranslator › MP4 to MP3
Convert MP4 to MP3
Lectures, concerts, interviews, voice memos recorded as video — often the audio is all you actually need, at a tenth of the file size.
Drop MP4 files here
or
Output is pre-set to MP3 — you can change it per file after adding.
About MP4 to MP3 conversion
The audio stream is extracted and encoded to high-quality MP3 (LAME V2) by FFmpeg running in your browser. Even large videos never leave your device — there is no upload step at all.
How to convert MP4 to MP3
- Drop your MP4 file onto the box above, or click Choose files.
- The output format is already set to MP3 — adjust it per file if you need something else.
- Click Convert, then download your MP3 file.
Free, no account, no watermarks — and because the conversion runs in your browser, your files are never uploaded to a server.