MP4 to MP3 Converter: Extract Audio From Any Video
Turn any video into an MP3 in your browser. Pick 128 to 320 kbps, convert and download. Free, private, no watermark.
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MP4 to MP3 320kbps
Convert MP4 to MP3 at the highest MP3 quality. Convert and download. Your video never leaves your device.
320 kbps by default
No upload
No signup
Drop a video here
or click to browse — MP4, MOV, M4A, WebM and other common formats
Your MP3 is ready
Best for videos up to about an hour. Very long or very large files may run out of memory.
100% Private
Files are converted locally in your browser — nothing is uploaded.
Fast
No waiting on uploads. Conversion runs right on your device.
Free & Unlimited
No account, no watermark, no file limits.
How to convert MP4 to MP3
Three quick steps. Nothing to install and nothing leaves your device.
1
Add your video
Drag a video onto the box above or click it to browse your files.
2
Choose the quality
Pick a bitrate from 128 to 320 kbps. 192 kbps is a good balance of size and sound.
3
Convert & download
Preview the audio in the player, then download your MP3.
When does 320 kbps make sense?
320 kbps is the top quality setting for MP3. It is a good choice when you are saving music you recorded or own, building a library for good headphones or a car stereo, or when you want to keep as much detail as possible before you share or edit the file.
For lectures, meetings and voice notes, you do not need it. 128 kbps sounds fine for speech and the file is much smaller.
What to expect
- Quality is set to 320 kbps for you. You can still choose 128, 192 or 256 kbps if you prefer a smaller file.
- Your video stays on your device. Conversion happens in your browser, with nothing to install.
- The result depends on the source. An MP3 cannot sound better than the audio in the video it came from.
File size at each quality
- 320 kbps: about 2.4 MB per minute.
- 192 kbps: about 1.4 MB per minute.
- 128 kbps: about 1 MB per minute.
Tips
- Keep videos under about an hour per conversion, especially on a phone.
- Need a different audio format? Convert the MP3 with MP3 to WAV.
- Prefer the standard tool? The regular MP4 to MP3 converter defaults to 192 kbps.
- Want a short clip instead of sound? Use MP4 to GIF.
Learn about Audio
Helpful guides on extracting audio and choosing the right MP3 quality.
Frequently asked questions
Quick answers about converting MP4 to MP3 with ConvertKit Lite.
How do I convert MP4 to MP3 at 320 kbps?
Add your MP4 file above. The quality is already set to 320 kbps, so press convert and download the MP3. You can change the quality in the menu if you want a smaller file.
Is 320 kbps really better than 192 kbps?
320 kbps is the highest quality an MP3 can have, and it can keep a little more detail. For most people the difference is hard to hear on phone speakers and earbuds. The file is also about 67 percent larger than a 192 kbps file.
Will converting to 320 kbps improve a poor recording?
No. An MP3 can only be as good as the sound inside the video. Video files usually store compressed audio already, so a higher setting keeps what is there but cannot add detail that was never recorded.
How big is a 320 kbps MP3?
About 2.4 MB per minute, so a 4-minute song is roughly 9.6 MB. At 192 kbps it is about 1.4 MB per minute, and at 128 kbps about 1 MB per minute.
Is my video uploaded to a server?
No. The conversion runs in your browser, so your video stays on your device.
Is there a limit on the video length?
There is no limit on our side. The audio is processed in your device's memory, so videos longer than about an hour may fail on some phones and older computers. Only convert videos you made or have permission to use.