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WebM to MP3 Converter

Convert WebM files to MP3 without installing software or uploading anything. Only the soundtrack is processed, at about 1.4 MB per minute of audio.

  • Free, no sign-up
  • Files never leave your device
  • Powered by FFmpeg
  • No watermark
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Your files are processed on this device and are never uploaded to a server.

What happens when you convert WebM to MP3

ResultOnly the soundtrack, encoded as MP3 at 192 kbps by default
File sizeAbout 1.4 MB per minute of audio
SpeedFast: the video track is skipped, so only audio is processed
Opens inevery device, car stereo and audio app

Sizes are typical values; your files will vary with content and settings.

WebM

WebM WebM Video

WebM is an open, royalty-free container built for the web, usually holding VP8 or VP9 video with Opus or Vorbis audio. Browser screen recorders and many web apps save WebM by default.

WebM converter
MP3

MP3 MPEG-1 Audio Layer III

MP3 is the most compatible audio format in existence. Every phone, car stereo, browser and editor plays it, and 128 to 320 kbps gives small files that sound good for music and speech.

MP3 converter

How to use the WebM to MP3 Converter

  1. 1

    Choose a WebM file or drop it onto the page.

  2. 2

    Review the audio options. The defaults suit most files.

  3. 3

    Click Convert and download your MP3 when processing finishes.

Why convert WebM to MP3?

WebM files come from videos saved from websites and from browser-based screen recorders. iPhones, some TVs and many editors play it poorly or not at all. Choose MP3 when the audio must play on any device, car stereo or upload form.

Audio extraction options

Only the audio track of the WebM is processed, so this is much faster than a video conversion. Choose the bitrate or quality, optionally trim to a start and end time, and download the MP3.

Frequently asked questions

Will the MP3 lose quality?

Both formats are lossy, so converting re-encodes the data once more. Using a high quality setting keeps the generational loss very small. Avoid converting the same file back and forth repeatedly.

How big will the MP3 file be?

About 1.4 MB per minute of audio at the default 192 kbps, so a 10-minute WebM gives roughly 14.4 MB. The size of the video track does not matter, because only the sound is kept. Choose 128 kbps for speech to make it about a third smaller.

Questions about privacy, file-size limits or conversion speed are answered in the general FAQ.