MP4 to MP3
Save the sound from your MP4 video as an MP3 file.
Files stay on your device. Nothing is uploaded.
One MP4 · up to 400 MB · audio up to 30 minutes
Higher bitrate makes a larger file; it cannot improve the source recording.
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M4A to MP3
Turn an M4A recording into a downloadable MP3, without uploading it.
Keep the audio from a recorded lesson, interview or personal video without carrying the picture along. Choose an MP4 on your device, select an MP3 bitrate and start the conversion. The tool reads the main audio track and creates a separate download; it does not change your original video. Processing stays in your browser, and the encoder loads when you start. Keep this tab open while it works. You can cancel the job and try again with another quality setting.
How to use
- Choose one MP4 video from your device.
- Select 128, 192 or 320 kbps; 192 is the starting setting.
- Press Convert to MP3 and keep the tab open until processing finishes.
- Download the MP3 and listen to it before sharing or deleting anything.
What it handles
- One MP4 at a time, up to 400 MB and 30 minutes of audio.
- Preserves mono or stereo at 32, 44.1 or 48 kHz; other channel layouts and sample rates are rejected.
- Reads the primary audio track, without converting video frames or mixing several tracks.
- Cancel stops the worker; Clear also removes the selected file and result.
- Output contains encoded sound, without copying the video's tags or cover image.
FAQ
Does 320 kbps improve the original recording?
No. MP3 is a lossy format, and a higher bitrate cannot restore detail already missing from the recording. A 320 kbps result is usually larger than a 128 kbps result. Try 192 kbps first, then listen to the download. For speech, a smaller file may be sufficient; choose based on what you hear.
Why does an MP4 sometimes fail to convert?
MP4 names the container, not the audio codec inside it. The browser must be able to decode that audio track. A damaged, protected or unsupported recording may fail even when its filename ends in .mp4. Files with no audio get a separate message. Try a current browser and an unprotected MP4 with a standard mono or stereo track.
Are there size limits, and is my video uploaded?
The video stays on your device. The limit is one file of 400 MB with up to 30 minutes of audio, and processing stops after ten minutes if it has not finished. Device memory and browser support still affect success within those limits. Large recordings are better handled on a computer. Closing the page cancels conversion; nothing is saved automatically.
Updated