WebM to WAV Converter
This free WebM to WAV converter turns the sound of a browser recording, a screen capture or a downloaded web video into an uncompressed 16-bit WAV that audio editors, DAWs and transcription tools open. Audio-only and video WebM files both work. The file is decoded on your device and is not uploaded.
Drop your WebM here or click to browse
WebM audio or video, up to 500 MB and 30 minutes.
The video is converted in your browser and is not uploaded.
Where a WebM file comes from
WebM is the format browsers themselves write, so most .webm files started life in a browser tab.
A recorder on a web page
Online voice recorders and voice-message widgets use the browser's built-in recorder. In Chrome, Edge and Firefox that recorder saves WebM, with the sound stored as Opus.
A screen or tab recording
Screen recorder extensions and web apps capture the screen, a tab and the microphone the same way and hand you a .webm video. The WAV holds its sound; the picture is left out.
A meeting recorded in the browser
Browser-based meeting and webinar recorders often save a long WebM video. If all you need is what was said, the sound alone is easier to edit or transcribe.
A video saved from the web
Some sites and download tools save video as .webm. The WebM Project's guidelines name VP8 or VP9 for the picture and Vorbis or Opus for the sound, and the converter reads both sound formats.
How to convert WebM to WAV
No account and nothing to install.
- 1
Drop the .webm file
Drag it onto the converter or click to browse. The page tries to read the length first. A recording saved straight from a browser recorder often carries no length in the file, and then the length and the size estimate appear only after converting.
- 2
Choose the sample rate and channels
WAV is preselected. Keep 44.1 kHz, or pick 48 kHz to match the recording or 16 kHz for speech tools, and turn Mono on if one channel is enough.
- 3
Extract audio and download
The browser decodes the Opus or Vorbis sound and the page writes a 16-bit WAV with the same name and a .wav ending. Listen to the preview before you save it.
Why turn a WebM into a WAV
WebM is made for playing in a browser. WAV is made for working on sound.
Audio editors and DAWs
Many editing programs do not import .webm or Opus sound at all, or need an extra plug-in for it. Every one of them opens a 16-bit WAV.
Transcription and speech tools
Speech-to-text scripts, research tools and some upload forms ask for WAV, often 16 kHz mono. Converting once gives you a file they accept.
Editing without piling up loss
Opus is a lossy format. Saving the edit as Opus or MP3 again compresses it a second time; a WAV keeps the decoded sound as it is through every draft, and you compress once at the end.
How large the WAV will be
Opus stores a recording in a small fraction of the space a WAV needs, so expect the WAV to be much bigger than the .webm. At 48 kHz stereo a 16-bit WAV takes 11,520,000 bytes a minute. The converter's default is the highlighted row.
| WAV setting | 5 minutes | 15 minutes | 30 minutes |
|---|---|---|---|
| 48 kHz stereo | 54.9 MB | 164.8 MB | 329.6 MB |
| 48 kHz mono | 27.5 MB | 82.4 MB | 164.8 MB |
| 44.1 kHz stereo | 50.5 MB | 151.4 MB | 302.8 MB |
| 16 kHz mono | 9.2 MB | 27.5 MB | 54.9 MB |
Which sample rate fits a WebM recording
Opus is a 48 kHz format, so 48 kHz is the natural match for a browser recording and for anything that goes into a video project: 30 minutes in stereo is about 329.6 MB, in mono about 164.8 MB. The default of 44.1 kHz is fine for general listening and editing, at about 302.8 MB for the same half hour.
For speech tools, 16 kHz with Mono on is the usual request and gives about 54.9 MB for 30 minutes. A higher rate than the recording had adds size, not detail, and the WAV cannot bring back anything Opus removed.
When a WebM will not convert
No sound track: a screen recording made with the microphone and tab audio switched off is a silent video, and the converter reports that it found no sound. Play the file first to check.
An old Safari: WebKit added Opus sound in WebM with Safari 15 (iOS and iPadOS 15). Before that, no browser on an iPhone or iPad reads it. In the Video to Audio Converter's format test of 30 September 2026, WebM with Opus or Vorbis sound converted in Chrome, Firefox and Safari. If one browser fails, try Chrome, Edge or Firefox on a computer.
Too long or too large: the limit is 500 MB and 30 minutes, because the whole sound track is decoded in memory. Cut a long recording into parts first.
Sources
Recording calls and meetings to get the notes? Read: Google Meet transcription, how to record a meeting on iPhone, the best free transcription app.
Recording in a browser tab just to keep what was said?
ParrotNotes records meetings, calls and voice notes on your phone and turns them into a transcript and a summary, free for 100 minutes of recording a month. There is no file to convert afterwards.
Get Started FreeRelated tools
- WebM to MP3 ConverterConvert WebM audio and screen recordings to MP3 in your browser, with a choice of bitrate, without uploading them.Open the tool
- Video to Audio ConverterPull the audio out of an MP4 or WebM video (MOV in Chrome, Edge or Firefox) and save it as MP3 or WAV in your browser, without uploading the file.Open the tool
- MP4 to WAV ConverterConvert an MP4 video to a WAV audio file in your browser, with no upload: a recorded interview, a demo video or a screen recording.Open the tool
- MOV to WAV ConverterExtract the audio from a MOV video as an uncompressed WAV file in your browser. Nothing is uploaded, and you choose the sample rate and channels.Open the tool
- Stereo to Mono ConverterMix a stereo recording down to mono, or keep only the left or right channel when the voice is in one ear, and download it as MP3 or WAV in your browser.Open the tool
- Audio to Text ConverterUpload an audio or video file up to 10 minutes and get an accurate transcript and a short summary, saved to your free ParrotNotes account.Open the tool