How to Convert a Video to MP3 Online (Free)
A podcast recording, a lecture, a song from a clip — sometimes you just need the audio, not the video weighing down the file. Here's how to pull out an MP3 in your browser, no software to install.
Steps
- Upload your video at Stelluna's Video to MP3 — mp4, mov, webm, mkv, or avi, up to 300MB.
- Click "Convert to MP3". The audio track is extracted and encoded to MP3 right in your browser.
- Wait a moment. The video portion is never processed — only the audio, so it's quick.
- Preview the result. Play the extracted MP3 before downloading.
- Download. Your MP3 file.
Ready to try it? Free, instant, your video never leaves your device.
Open Video to MP3What determines the MP3's quality?
The output quality is bounded by your source video's own audio track — the tool encodes it to MP3 at a high bitrate, so it doesn't add noticeable loss on top. A video recorded with a poor microphone will still sound like it was recorded with a poor microphone; converting to MP3 can't add detail that wasn't captured in the first place.
FAQ
Is it free?
Yes — no account, no watermark, no limit on how many videos you convert.
Does my video get uploaded anywhere?
No. Audio extraction runs entirely in your browser — the file never leaves your device.
Which video formats are supported?
mp4, mov, webm, mkv, and avi, up to 300MB.
Can I convert just part of the video?
Not currently — the whole video's audio track is extracted. Trim the part you want first with Stelluna's Video Trimmer, then upload the result here.
Do I need to sign up?
No.