MP4 to MP3
Upload a MP4 file and download it as MP3. Free to start.
- Sent over HTTPS · link expires in 24 h
What changes
MP4 and MP3 side by side: quality, size and where each one opens.
MP4 vs MP3
| Property | MP4 | MP3 |
|---|---|---|
| Quality | Excellent | Good |
| File size | Medium | Small |
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| Disadvantages |
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MP3 files are usually smaller than MP4 files. MP3 opens on every major platform. Convert MP4 files when the app, site or workflow you use needs MP3.
How it works
- Step 1:
Drop the MP4 file on the orange block above, or press “Choose MP4”.
- Step 2:
Press “Convert to MP3”. The block shows the progress while the server converts the file.
- Step 3:
Press “Download” to save the MP3 file. On Free the link works for 24 hours.
How MP4 to MP3 conversion works
Converting an MP4 video file to MP3 extracts the audio stream from the container and saves it as a standalone audio file, discarding the video track entirely. MP4 is a multimedia container that can hold video (H.264, H.265), audio (AAC, MP3), and subtitle streams simultaneously. MP3 is a dedicated audio format using the MPEG-1 Audio Layer III lossy compression algorithm, widely supported across all devices and media players. During extraction, the existing audio codec is either copied directly (stream copy) when it is already MP3, or re-encoded from AAC to MP3 using the LAME encoder at the selected bitrate. Common output bitrates are 128 kbps (voice or podcast quality), 192 kbps (standard music), and 320 kbps (near-lossless music). 1converter uses FFmpeg for this conversion, which ensures accurate audio sync, correct sample rate handling, and ID3v2 metadata preservation where present in the source file.
Quality levels for MP4 → MP3
| Level | File size | Speed |
|---|---|---|
| Low qualitySmallest file, basic quality | Very small | Very fast |
| Medium qualityRecommendedBalanced size and quality | Medium | Fast |
| High qualityLarger file, great quality | Large | Moderate |
| Maximum qualityLargest file, best possible quality | Very large | Slow |
Audio Tip: For music, High quality (320kbps) is recommended. Medium quality works well for podcasts and voice recordings.
When to convert
What the MP3 file is good for and why people convert to it.
- Extract audio onlyRemove video to save space
- Smaller file sizeMP3 files are much smaller than videos
- Extracting music from music videos
- Creating podcasts from video interviews
Where your file goes
- It travels to our server over an encrypted HTTPS connection and is converted there.
- The MP3 file comes back as a private link. It stops working after 24 hours on Free and 7 days on paid plans, and then the files are deleted.