Convert MP4 to MP3
Upload your video and extract high-quality MP3 audio in one click.
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Convert MP4 to MP3
Extract audio from MP4 and save as MP3 online for free. Choose 128k, 192k, or 320k bitrate and download instantly.
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Upload a file to get started.
Supported Input and Output
- Accepted input
- MP4, MOV, MKV, WebM, AVI, and M4V video
- Output
- MP3 audio
- Upload limit
- Up to 25 MB per file under the default server configuration
- Controls
- MP3 bitrate
What This Processing Changes
The video track is discarded and the audio track is encoded as MP3. Visual content, subtitles, and chapters are not included.
How to Check the Result
- Verify the duration and audio codec in the downloaded file.
- Listen for distortion; increasing bitrate cannot restore discarded source detail.
Limits and Troubleshooting
- A video with no audio track cannot produce useful MP3 output.
- Choose a lower bitrate for a smaller file or a higher bitrate when preserving music detail matters.
Related Audio Tools
Worked Example: Extract the tone audio from a video clip.
- Upload sample.mp4 from the downloadable example.
- Choose bitrate: 128 kbps.
- Process, download, and listen to the complete result.
Check Your Download
- Verify the duration and audio codec in the downloaded file.
- Listen for distortion; increasing bitrate cannot restore discarded source detail.
Limit: The sample is a synthetic tone, not speech or music. Its size and quality are not representative of every recording.
Download the example input and repeat the steps above. These are generated test files, not customer uploads.
- Input bytes
- 135,582
- Output bytes
- 33,583
- Verified result
- 2.020 seconds; mp3
- Test date
- 2026-10-06
Measurements apply to this sample and these settings. Other inputs and codec versions can produce different sizes and results.