Why is the WAV so much bigger than the WebM?

WebM audio is compressed. WAV stores every sample uncompressed, which editors prefer but takes more space.

Can I transcribe the WAV?

Yes. Most transcription and speech-to-text tools accept PCM WAV directly.

WebM to WAV

Save the sound from a WebM video as an uncompressed WAV. Processing stays on your device.

Files stay on your device

Drop a file to convert

See its format, then choose an output.

Any media file this browser’s engine can read.

How to convert WebM to WAV online

Open a WebM and export its audio as a WAV file for editing or transcription. The WebM to WAV converter decodes the Opus or Vorbis audio to uncompressed PCM in your browser, without uploading the file.

Step 1
Choose your WebM
Pick a file or drop it into the converter above.
Step 2
Keep WAV
WAV is selected; choose another audio format if you need one.
Step 3
Download the WAV
Save the uncompressed audio when it is ready.

What to expect

Supported inputs: WebM videos and audio-only WebM files, and other readable video or audio files.
What happens: The video track is dropped and the audio is written as uncompressed PCM in a WAV file. WAV is selected first; you can choose another audio format.
Limits: The WebM needs an audio track. WAV files are much larger than WebM audio, roughly 10 MB per minute of stereo sound.

Private by design

Your video stays on your device

Mastershot processes your file locally in this browser. It does not need to be uploaded to a server, and you do not need an account to use the tool.

No upload
No signup
No watermark