About this tool
The Video to MP3 Converter, also known as an MP4 to MP3 converter, reads the sound from a video file and saves it as an MP3. Your browser decodes the audio and an MP3 encoder runs on your device, so the video is never uploaded anywhere.
How to convert a video to MP3
- Choose a video file. MP4, MOV and WebM work best.
- Pick a quality. 128 kbps is plenty for speech. Use 192 kbps or higher for music.
- Press Convert to MP3 and wait for the progress bar to finish.
- Play it back to check, then download the file.
Quality and file size
| Bitrate | Approximate size per minute | Good for |
|---|---|---|
| 128 kbps | about 1.0 MB | Speech, podcasts, lectures |
| 192 kbps | about 1.4 MB | Everyday music |
| 256 kbps | about 1.9 MB | Higher-quality music |
| 320 kbps | about 2.4 MB | Maximum MP3 quality |
An MP3 made from a video cannot sound better than the audio inside that video. A higher bitrate only makes the file larger once the source is already compressed.
Things to watch out for
- The browser must understand the audio. Files with common audio such as AAC or MP3 work. Some MKV and AVI files use audio the browser cannot read and will fail.
- Large files use memory. The whole audio track is decoded before encoding, so files over about 200 MB or very long recordings can fail on phones.
- Only convert media you have the right to use. Copyright rules still apply to the audio you extract.
Frequently asked questions
Choose your MP4 file, pick a bitrate and press Convert to MP3. The audio is extracted and encoded in your browser, then you can download the MP3.
No. The file is read and converted in your browser. It never leaves your device.
MP4, MOV and WebM work in most browsers. Support depends on the audio inside the file, so some MKV or AVI files will not decode.
Use 128 kbps for speech and 192 kbps for music. Higher settings give larger files and only help if the source audio is high quality.
The most common causes are an audio format your browser cannot read, a file that is very large or long, or low memory on a phone. Try a shorter file or a different browser.
If the MP3 encoder cannot load, the tool saves a WAV file instead so you still get your audio.