Convert WebM to MP3 without uploading it
Screen recording, web capture, browser export: import the WebM and keep only the sound. Nothing is sent to a server.
How to convert a WebM to MP3
- 1
Import your WebM
Drop the screen recording or web capture. It stays on your device.
- 2
Choose MP3
192 kbps is plenty for a voice recording or a meeting capture.
- 3
Save the MP3
Download the audio, ready for a transcript, a podcast or an archive.
The audio is out. Now make it listenable.
Montaj cuts the silences, cleans up a noisy recording with an on-device model and writes word-by-word subtitles — all on your device, without uploading anything.
Frequently asked questions
How do I turn a screen recording into an MP3?
Import the WebM here and choose MP3. Only the audio track is kept, which is usually all you need from a meeting or a tutorial capture.
Why is a WebM screen recording so quiet?
Browser capture often records the microphone at a low level. Tick the option that evens out the volume during extraction and the result comes out at a normal listening level.
Is the recording uploaded anywhere?
No. A screen recording frequently shows things that should not leave the machine, so the extraction runs entirely in your browser and the file never gets sent.
Can I transcribe the result?
Yes. Once the MP3 is out, the transcription tool turns it into timestamped text, still on your device.