MP4 to MP3 Video Converter
Drop your MP4 files — the MP3 video is generated in your browser in seconds. Multiple files at once, no upload on the fast path.
9,214+ video files converted
Need your video as MP3? Drop the files and they are re-encoded right on this page — no install, no sign-up, no queue. Typical MP3 output is ~1 MB/min @128 kbps, and the work happens locally so your video stays on your machine.
Looking to programmatically convert MP4 to MP3?
Same engine, available as a JSON API. Drop a file or URL via REST and get the converted video back — no browser, no UI, no rate limits on paid tiers.
Fast response on common video pairs
Webhook delivery for batch jobs
Dozens of video format pairs supported
MP4 vs MP3: how they compare
The numbers and capabilities at a glance, so you know what you're trading.
MP4
- Year released
- 2001
- Compression
- H.264 (lossy)
- Transparency
- No
- Animation
- Yes (video)
- Browser support
- Universal
- Best for
- Sharing & streaming everywhere
MP3
- Year released
- 1993
- Compression
- Lossy
- Transparency
- No
- Animation
- Audio only
- Browser support
- Universal
- Best for
- Extracted soundtrack
Real MP4 → MP3 file sizes
We ran fixed video clips through this exact converter so you can see the typical size impact before converting your own files.
| Video sample | MP4 size | MP3 size | Change |
|---|---|---|---|
| High motion | 263.0 KB | 72.4 KB | -72% smaller |
| Complex detail | 370.1 KB | 72.4 KB | -80% smaller |
Measured on synthetic 3s · 426×240 · 20 fps video clips with this converter on 2026-06-23. Real-world files vary with duration, resolution, codec and content.
Heads up before converting to MP3
What this specific conversion changes about your video.
Audio only — the video is dropped
Converting MP4 to MP3 extracts the soundtrack and discards the video. You get a MP3 audio file, not a video.
Best practices for MP3
Small choices that keep your output sounding right.
- Play the MP3 result back before deleting your original MP4.
The importance of a good video conversion
Why getting MP4 → MP3 right matters more than you think.
Frequently asked
The basics everyone asks before dropping a track.
Convert MP4 to other formats
Convert other formats to MP3