How do I convert WebM to MP3?

Drop the file on this page and press the button. It runs in your browser, so there is no upload, no account and no daily limit.

Why will my device not open a WebM file?

Almost everything outside a browser. A WebM is excellent on a page and unwelcome on a desktop, in a car, or in anything with a timeline.

Does converting to MP3 lose quality?

MP3 is lossy, so a little goes at any bitrate. 192 kbps is transparent for speech and close to it for music; 320 is the ceiling and is only worth it when the source was better than the target.

Is the file uploaded?

No. The decode and the encode both happen in the page, and no request carries the audio anywhere. Watch the network panel while it runs.

ON YOUR DEVICE · FREE

WebM to MP3

WebM is what a browser writes when it records, and what a lot of the web serves

…

What the conversion sites charge

Convertio	~~$6.99 / month~~	converts on their servers, with a daily cap
Zamzar	~~$12 / month~~	converts on their servers, with a size cap
CloudConvert	~~$10 / month~~	converts on their servers, priced per minute
PixPunk	Free	no upload, no account, no daily cap

If this file came out of a browser recorder, its duration metadata is often missing or wrong. The audio is fine; it is the header that is lazy. Their caps exist because every conversion runs on a machine they rent. Yours runs on the machine in front of you.

1
Where your WebM came from
WebM is what a browser writes when it records, and what a lot of the web serves. Inside is usually Opus or Vorbis audio.
2
Why you are converting it
Almost everything outside a browser. A WebM is excellent on a page and unwelcome on a desktop, in a car, or in anything with a timeline. MP3 is the format nothing refuses. That is its entire remaining argument and it is a good one.
3
What it costs
MP3 is lossy, so a little goes at any bitrate. 192 kbps is transparent for speech and close to it for music; 320 is the ceiling and is only worth it when the source was better than the target.

FAQ

How do I convert WebM to MP3?: Drop the file on this page and press the button. It runs in your browser, so there is no upload, no account and no daily limit.
Why will my device not open a WebM file?: Almost everything outside a browser. A WebM is excellent on a page and unwelcome on a desktop, in a car, or in anything with a timeline.
Is there anything odd about WebM?: If this file came out of a browser recorder, its duration metadata is often missing or wrong. The audio is fine; it is the header that is lazy.
Does converting to MP3 lose quality?: MP3 is lossy, so a little goes at any bitrate. 192 kbps is transparent for speech and close to it for music; 320 is the ceiling and is only worth it when the source was better than the target.
Is the file uploaded?: No. The decode and the encode both happen in the page, and no request carries the audio anywhere. Watch the network panel while it runs.

WebM to MP3

What the conversion sites charge

Where your WebM came from

Why you are converting it

What it costs

FAQ

The other tools