MP4 to MP3 Converter

What happens during conversion

Your browser reads the audio track from the video using its built-in decoder, then our MP3 encoder (the open-source LAME encoder compiled for the web) turns it into an MP3 file. The video picture is simply discarded. Because the work happens on your computer or phone, the speed depends on your device, not your internet connection — a 10-minute video usually takes a few seconds on a modern laptop.

Which bitrate should you choose?

Bitrate is how much data is used for each second of audio. 128 kbps is perfectly clear for lectures, podcasts and voice notes and makes small files (about 1 MB per minute). 192 kbps is a good balance for music (about 1.4 MB per minute). 320 kbps gives the highest MP3 quality (about 2.4 MB per minute). Note that converting can’t add quality that wasn’t in the original: if the video’s audio is low quality, a higher bitrate only makes the file bigger.

Common uses

Turn a recorded lecture or meeting into audio you can listen to on the go, extract the soundtrack from your own videos for editing, save a voice memo from a screen recording, or make a podcast episode from a video interview you recorded.

Large files and phones

The whole audio track is held in memory while converting, so very long videos need a lot of RAM. Videos up to about 20 minutes work well everywhere; on a computer you can usually go up to 30 minutes. Keep the page open until the download button appears.