Video to MP3 converter — free online tool
Convert MP4, MOV, M4V or WebM video to an MP3 file at 96 to 320 kbps, ideal for lectures, interviews and podcasts, in your browser.
Audio
Video to MP3
Choose a file, adjust the edit, preview the result, and export it.
Or drop an MP4, MOV, or WebM video anywhere on this page.
What to know
Video to MP3 turns the soundtrack of an MP4, M4V, MOV or WebM clip into a standard MP3 through the LAME encoder. It is the right pick when the result goes to a podcast host, a car stereo, a phone with limited storage or any player that does not know AAC.
The size follows the bitrate. At 128 kbps a one-hour lecture video becomes 3,600 s x 16,000 bytes, about 57.6 MB. At 192 kbps, the preselected value, it is about 86.4 MB, and at 96 kbps with Mono selected it drops to about 43.2 MB, which is plenty for a single speaker.
Because the video's own audio is usually AAC, this is a lossy-to-lossy step. For talking-head footage that makes no practical difference, but if the soundtrack is a concert or a studio-quality mix, raise Audio quality to 256 or 320 kbps to keep the cost to the sound small.
Streams of conversation often have silence at the start and end. Extract first, then open the MP3 in the audio trimmer to cut the waiting time before the first word and after the last one.
Use footage you own or have permission to reuse; the tool changes the format, not who holds the rights.
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How to use Video to MP3 converter — free online tool
- Drop lecture.mp4 on the video area of the MP3 tab.
- Set Audio quality to 128 kbps, or 96 kbps with Channels on Mono for a single speaker.
- Keep Sample rate on Keep source, run the extraction, and play the preview.
- Download lecture-video-to-mp3.mp3 and, if needed, trim the silent ends afterwards.
Quick answers
How big is the MP3 of a one-hour video at 192 kbps?
About 86.4 MB, from 24,000 bytes per second over 3,600 seconds.
What settings keep a lecture small without hurting clarity?
96 kbps in Mono works for one speaker and gives roughly 43 MB per hour.
Will the MP3 sound worse than the video's audio?
It is encoded again from AAC, so a tiny amount of detail is lost. At 256 kbps or more it is difficult to hear.
Does the output keep the video's file name?
Yes, with the mode appended, so lecture.mp4 yields lecture-video-to-mp3.mp3.