Convert MP4 to MP3 — extract the audio, free and private
Pull the sound out of any MP4 video and save it as an MP3. Choose your quality (128, 192, or 320 kbps), keep the title and artist when the video has them, and do it all on your device — your video is never uploaded.
Good to know
- Price
- Free — no premium tier, no watermark
- Account
- None — no sign-up, nothing to install
- Your files
- Processed on your device only — never uploaded
- Multiple files
- One file at a time
- Formats
- MP4 → MP3
How it works
Drop your MP4 video
Drag your .mp4 file into the box, tap to browse, or paste it. One video at a time keeps things fast.
Pick your audio quality
128 kbps is fine for speech, 192 kbps is a good all-round choice, and 320 kbps keeps the most detail for music.
Download your MP3
The audio is extracted on your device and saved as an MP3, with the title and artist copied over when the video provides them.
Why use this tool
- Your video never leaves your device — no upload, no waiting for a server
- Three quality levels: 128, 192, or 320 kbps
- Title and artist metadata preserved when present in the video
- No account, no watermark, no time limit on the video
About the MP4 format
MP4 is the world's most common video container: it bundles a video track with an audio track (usually AAC). Most of the time, the picture is not what you want to keep — a recorded lecture, a song from a live video, an interview. Extracting the audio means taking that sound track out and saving it on its own, which is much smaller and plays anywhere.
About the MP3 format
MP3 is the universal audio format: it plays on every phone, car, computer, and speaker. This tool re-encodes the extracted sound as a proper MP3 at the quality you choose and writes the standard ID3 tags (title, artist) when the source video contains them.
Frequently asked questions
Is my video uploaded somewhere?
No. The extraction runs in your browser with FFmpeg compiled to WebAssembly. Your video is read and processed on your own device; nothing is sent to a server.
Which quality should I choose?
For speech (lectures, interviews, voice notes), 128 kbps is plenty. For music, 192 kbps is a good balance, and 320 kbps keeps the most detail at a larger file size.
Why is a very large video slow or failing?
Because everything happens in your browser, a very large file (several hundred MB) can exceed the memory a phone or browser tab can use. If a conversion fails, try a shorter clip or a computer with more memory — your file is never at risk either way.
Will the MP3 keep the song title and artist?
When the MP4 file contains title or artist information, it is copied into the MP3's tags automatically. When the video has none, the MP3 simply takes the video's file name.