Convert WEBM to MP3
A recorded video call or a browser screen recording often lands as a WEBM file. When you only need what was said, turn it into an MP3 you can play back anywhere.
- MP4
- MOV
- AVI
- VOB
- MKV
- WEBM
- MPG
- MPEG
- M4V
- 3GP
- TS
- MTS
- M2TS
- Runs in your browser
- 100% free
- Private
How to convert WEBM to MP3
Drop in the WEBM file
Find the .webm recording in your Downloads folder and add it. Recordings saved in several pieces can be added together.
Make the MP3
Choose MP3 and click Convert to MP3. The Opus sound of the WEBM is turned into a 192 kbps stereo MP3 on your computer.
Play the call back
Use the player on the page to check you got the whole call, then download the MP3 to share with the people who missed it.
Why people use Adapterry
Nothing is uploaded
Your videos are processed in your browser and never leave your device.
No account needed
Open the page and start. No email, no password.
No watermark
Your video comes out clean, with no logo stamped on it.
Works offline
Once the page and video engine have loaded, you can keep working without an internet connection.
Supported formats
Add MP4, MOV, AVI, VOB, MKV, WebM, MPG, M4V, 3GP, TS or MTS files, or a mix, and get back one MP4, MOV, AVI or VOB, or an MP3 of the sound. MP4 plays almost everywhere.
From a web recording to an MP3
WEBM is the video format of the web, usually VP9 or VP8 video with Opus sound. Browser recorders and some call tools save it, but many music players, car stereos and older phones don't know what to do with a .webm file.
Adapterry reads the first audio track and writes a 192 kbps, 48 kHz stereo MP3, which plays almost everywhere. Several WEBM files are joined into one MP3 in list order. Before you share a call, make sure everyone in it agreed to be recorded.
Questions and answers
Why won't my WEBM file play in my music app?
Most music apps don't read WEBM. Converting it to MP3 keeps the sound and gives you a file nearly every player opens.
Can I merge two WEBM call recordings into one MP3?
Yes. Add both, put them in order and click Merge & convert to MP3. The second call starts right after the first.
My browser screen recording has no sound. What now?
If the recorder captured only the picture, the WEBM has no audio and can't become an MP3. Adapterry shows a message saying so.
Is the recorded call sent to a server?
No. The WEBM is converted inside your browser and never uploaded, so a private meeting stays on your computer.
Can I play the WEBM audio as MP3 before downloading?
Yes. Once it is done, a player on the page plays the MP3, so you can check it and then click Download MP3.