Convert MP4 to MP3
A talk recorded on a phone, a song from a concert clip, a lecture you want in your podcast app: the sound is what matters and MP3 plays on every device made in the last twenty years. This preset takes the audio track out of the video and encodes it to MP3 with the LAME encoder, which runs in your browser as a separate file loaded only when you ask for MP3. The video is read in pieces, so a long recording works too, and the result is ready to play before it is downloaded.
Options
Nothing is uploaded: the file never leaves your device, and the page has no account and no queue. Choose 128 kbit/s for talks and 192 or higher for music, mono for a single voice, and use the small player to keep only the part you need.
Tips
- For a voice recording pick the 'Voice memo' preset: mono, 16 kHz, low bitrate; a one-hour talk comes out around 25 MB.
- For music keep stereo and choose 'High' (192 kbit/s) or 'Very high' (320 kbit/s).
- If the video already carries MP3 or AAC sound and you want no loss at all, switch the format to 'Original': the stream is copied, not re-encoded.
Why it is private
Everything you type or drop here is handled by your browser, on your device. Nothing is uploaded. To verify, open your browser's developer tools, go to the Network tab, and use the tool: you will see no request carrying your data.
Frequently asked questions
- Is the MP3 made on my device?
- Yes. The encoder (LAME) is a small file the page fetches the first time you choose MP3; the encoding runs in a worker on your device. The indicator under the result shows that no bytes of the video were sent anywhere.
- Which quality should I choose?
- 128 kbit/s is transparent for speech and fine for casual listening; 192 kbit/s is the usual choice for music; 320 kbit/s is the most MP3 allows. Mono halves the size and loses nothing on a single voice.