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WEBM to MP3 converter

Convert WEBM to MP3 in your browser. No upload and no account: the file never leaves your device, so the only size limit is your device’s memory.

I want MP3
Advanced 4
sec

Leave both at 0 for the whole file.

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Bytes of your files sent anywhere: 0 B

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Other ways to convert WEBM

Convert other formats to MP3

Read more about the WEBM format and the MP3 format, or see every video tool and all video conversions.

Should you convert WEBM to MP3?

You have a WebM recording and want just its soundtrack as an MP3 you can play in any app or car.

Yes, when you only need the sound: a song from a music video, the audio of a lecture, or a voice recording to transcribe. The picture is left out and the soundtrack is saved as MP3.

WEBM is the web’s open video format, holding VP8, VP9 or AV1 video with Opus or Vorbis audio; MP3 is the most compatible lossy audio format ever made. Use MP3 when you don’t know what will play the file: cars, old players, podcasts hosts and upload forms all take it.

WEBM and MP3 compared
Property WEBM MP3
What it is The web’s open video format, holding VP8, VP9 or AV1 video with Opus or Vorbis audio The most compatible lossy audio format ever made
Audio inside VP9 or AV1 video with Opus audio 128–320 kbps
Plays on Chrome, Firefox, Edge and recent Safari, but not the iPhone Photos app, many editors or social uploads Every phone, computer, car stereo, speaker and app
Best for Video embedded in web pages, and browser screen recordings Music and voice that has to play on anything

How to convert WEBM to MP3

  1. 01

    Add your WEBM

    Drop your WEBM video onto the box, or click to choose it. It is read from your disk and stays there.

  2. 02

    Check the settings

    The output is already set to MP3. Change the bitrate if you want to; the defaults suit most files.

  3. 03

    Save the MP3

    Press convert and save the MP3. Several files come back together as a ZIP.

What changes when WEBM becomes MP3

From Opus to MP3

WEBM soundtracks are usually Opus, so saving MP3 is one more lossy step. 192 kbps suits music, 128 kbps is plenty for speech, and going above the original bitrate only makes the file bigger.

Video files without sound

Screen recordings and some exported clips have no audio track at all. The file is checked as soon as you add it, and you’ll be told before converting if there’s nothing to extract.

This page is put together from our notes on each format, choosing only what is true of WEBM and MP3, so every pairing states the same facts the same way. How these pages are made.

Why it doesn’t upload

Uploading a whole video to keep only its sound wastes time and data, and hands over the footage too. The audio track is read and saved right here, and the file never leaves your device.

How to check for yourself

Worth knowing

  • About the WEBM. Browser screen recorders save WEBM, and the recording then fails to upload or attach almost everywhere else.
  • About the MP3. Converting a low-bitrate MP3 to 320 kbps makes it bigger without making it sound any better; what was thrown away is gone.
  • AVI, WMV, FLV and other older formats use the FFmpeg engine, a one-time 31 MB download.

Questions

Does extracting MP3 from a WEBM lose quality?

The soundtrack is compressed again as MP3. At 192 kbps the difference from the original is inaudible for nearly everyone.

Can I get the audio from only part of the video?

Yes. Set a start and end time before converting, and only that section is saved as MP3.

Read more about this

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