Convert MP4 to MP3
MP4 is the most common video format — phones, cameras, screen recorders and most video downloads use it. Its audio is usually AAC, which every modern browser can decode, so MP4 files convert reliably.
How to convert MP4 to MP3
- 1
Select your MP4 file
Drop the file in or click to choose it. It opens directly in your browser.
- 2
Choose the MP3 quality
128 kbps keeps files small, 192 kbps suits most audio, and 320 kbps gives the best music quality.
- 3
Convert and download
The audio track is decoded and encoded to MP3 on your device. Download the MP3 when it is done.
Frequently Asked Questions
Does converting MP4 to MP3 lose quality?
MP3 is a lossy format, so the audio is re-encoded. At 192 or 320 kbps the difference from the original track is hard to hear for most listeners.
Is this MP4 to MP3 converter free?
Yes. It is free with no account, no watermark and no limit on the number of files.
Is my file uploaded to a server?
No. Conversion runs locally in your browser using WebCodecs, so your file never leaves your device.
Is there a file size limit?
There is no upload, so there is no upload limit. Very long videos are limited only by your device's memory.