WebM to WAV Converter
Turn the sound of a WebM file into a WAV that every audio editor, DAW and transcription service accepts. The Opus or Vorbis audio is decoded once to plain PCM, at the source's own sample rate.
Video to Audio
or drop MP4, MOV, MKV … files here ·
Max 95 MB per file· Up to 20 files· Deleted after 30 minutes
Files are processed on our servers and deleted after 30 minutes.
Keep the source rate unless a device or app asks for one. 44.1 kHz is CD standard, 16 kHz is enough for speech recognition.
Mono halves the size of lossless files and is fine for speech.
16-bit is CD quality. Choose 24-bit only if you will edit or master the audio.
Videos with several languages or a commentary have more than one track. 1 is the main track.
Optional. Seconds (e.g. 75) or minutes:seconds (1:15). Leave empty to start at the beginning.
Optional. Same format as the start time. Leave empty to keep everything up to the end.
How to use this tool
- 1
Upload the WebM
Add up to 20 .webm recordings or videos, each up to 95 MB. Other video formats such as MP4 and MKV work too.
- 2
Keep the defaults
Convert to is WAV, Bit depth 16-bit and Sample rate Same as source. Set Channels to Mono for a single voice to halve the size.
- 3
Extract to WAV
Press Extract to WAV and download one WAV per WebM, named after the original.
Opus and Vorbis: the sound inside a WebM
Google introduced WebM in 2010 for royalty-free web video, and it allows only two audio codecs, both from the Xiph.Org world. Vorbis, finalized in 2002, is the older one and appears in early VP8 videos. Opus, standardized by the IETF as RFC 6716 in 2012, is what browsers use today: when Chrome or Firefox records your screen, a call or a voice note through the MediaRecorder interface, the sound in the resulting WebM is almost always Opus.
Both are lossy and both are efficient, which is why a 60-minute WebM recording can be small. They are also unfamiliar to a lot of software outside the browser. Older DAWs, many transcription services, hardware samplers and broadcast tools want WAV, and so do people who will cut, denoise and re-export the sound. A WAV is the most widely accepted audio file there is: a header followed by raw samples.
WEBM
WebM video
WebM is an open, royalty-free video format released by Google in 2010 for the web. It is based on Matroska and holds VP8, VP9 or AV1 video with Vorbis or Opus audio, and VP9 WebM can include an alpha channel for transparent video. Browsers play it natively, and browser screen recorders often produce it. Apple devices, video editors and social platforms have historically had weaker support than for MP4.
- Compression
- Lossy
- Transparency
- Yes
- Animation
- –
- Introduced
- 2010 · Google
WAV
Waveform Audio File
WAV is an audio container created by Microsoft and IBM in 1991, usually holding uncompressed PCM audio. It preserves full quality, which makes it standard for recording, editing, sound effects and mastering. A minute of CD-quality stereo takes about 10 MB, so files are large. Every operating system, editor and most players open WAV, though metadata support is limited.
- Compression
- Lossless
- Transparency
- –
- Animation
- –
- Introduced
- 1991 · Microsoft and IBM
People convert WebM to WAV because the Opus or Vorbis sound of a browser recording, a web meeting or an online clip will not open in many audio editors and speech tools, which accept uncompressed PCM without question.
Which sample rate a WebM to WAV conversion should use
- 16 kHz
Enough for speech recognition and voice notes; a third of the size of 48 kHz.
- 22.05 kHz
Voice with some room tone; music starts to sound dull.
- 44.1 kHz
CD standard. Use when the WAV goes into a music project at that rate.
- 48 kHz
Opus's native rate and the video standard; what Same as source gives.
What happens to the WebM during conversion
Open the container
The WebM is unpacked; the VP8, VP9 or AV1 picture is set aside.
Decode Opus or Vorbis
The compressed sound is decoded once into PCM samples.
Write the WAV
Samples are stored at the bit depth and channels you chose.
WAV sizes are easy to predict because nothing is compressed: 16-bit stereo at 48 kHz is 192,000 bytes a second, about 11.5 MB a minute, and at 44.1 kHz about 10.6 MB. Browser recordings of a single voice are often mono already, which halves those numbers. If you only want to listen, WebM to MP3 gives a file about a tenth of the size; for editing, WAV is the right choice.
WebM to WAV questions
Why does my WAV from WebM come out at 48 kHz?
Because Opus, the usual WebM sound codec, always decodes at 48 kHz, whatever the recording's bandwidth. With Sample rate on Same as source the WAV keeps 48 kHz, which is also the standard rate for video. Choose 44.1 kHz only if a CD project or a device asks for it.
Is anything lost or gained when Opus becomes WAV?
Neither. Opus is lossy, so whatever it discarded when the WebM was recorded stays discarded. Decoding it to PCM loses nothing further, and every later edit starts from those exact samples instead of adding another lossy round.
How large will the WAV from a one-hour meeting recording be?
At 48 kHz and 16-bit, about 690 MB in stereo or about 345 MB in mono, compared with roughly 30 to 60 MB for the Opus audio inside the WebM. A recording that long will not fit the 95 MB upload limit as video anyway, so trim it into parts or choose a shorter section with Start at and End at.
Can Audacity open a WebM file directly?
Only with Audacity's optional FFmpeg import library installed, and even then the video has to be read along with the sound. A WAV opens immediately in Audacity and in every other editor, with no extra components.
Does this page take .weba audio files?
It is built for .webm video files. For audio-only WebM saved with the .weba extension, use WEBA to MP3, or convert the original .webm recording here if you still have it.
