WebM to WAV Converter

How to Convert WebM to WAV Online

1. Upload Your WebM File: Drag and drop or click "+ Add Files" to add one or more .webm clips — screen recordings, YouTube/Twitter downloads, MediaRecorder captures, or browser voice notes. Batch conversion is supported and runs on our servers.
2. Pick a PCM Codec: Default is pcm_s16le (16-bit signed little-endian) — the CD-quality baseline that every editor reads. Switch to pcm_s24le for 24-bit mastering depth, pcm_s32le for 32-bit headroom, or pcm_alaw / pcm_mulaw for legacy telephony workflows (8-bit logarithmic, ~64 kbit/s).
3. Set Audio Channel, Sample Rate, and Trim (Optional): Choose Mono or Stereo under Audio Channel, pick Audio Sample Rate (8000 / 16000 / 24000 / 44100 / 48000 Hz — match the source to avoid resampling artifacts), and use Trim to clip a start time and duration if you only need part of the recording.
4. Convert and Download: Click Convert. The video stream is discarded, the Opus or Vorbis audio track is decoded, and a fresh PCM WAV file is written — no watermark, no sign-up, no sign-up.

Why Convert WebM to WAV?

WebM is Google's open container (released May 2010) that wraps VP8/VP9/AV1 video and Vorbis or Opus audio. WAV is the Microsoft and IBM RIFF container from 1991 that stores uncompressed linear PCM — the lingua franca of audio editing. Converting from WebM to WAV decodes the lossy Opus/Vorbis stream back to raw samples so DAWs, transcription engines, and broadcast tools can work with it natively.

• Edit in a DAW — Audacity, Reaper, Logic, Pro Tools, and Ableton Live all open WAV instantly. Most refuse WebM or hand it off to FFmpeg with unpredictable results.
• Feed transcription / ASR pipelines — Whisper, AssemblyAI, Deepgram, and Google Speech-to-Text recommend 16-bit PCM WAV at 16 kHz mono for best word error rates; WebM/Opus often needs an extra decode step.
• Master a podcast or voice-over — strip the screen-capture video from an OBS or Zoom recording, keep the voice track lossless, then bounce to MP3/AAC for distribution.
• Broadcast and post-production handoff — AAF, OMF, and EDL workflows expect WAV; many station automation systems reject anything else.
• Sound design and sample libraries — slicing, time-stretching, and pitch-shifting work cleanly on uncompressed PCM; lossy source material compounds artifacts on every edit.
• Archive a master copy — keep a 24-bit WAV as the preservation original; re-encode to lossy formats as needed without ever transcoding lossy-to-lossy.

WebM vs WAV — Format Comparison

PCM Codec & Sample Rate Quick Guide

Frequently Asked Questions

Why is my WAV so much larger than the original WebM?

WebM audio is lossy and compressed (Opus typically targets 64–128 kbps for stereo speech and music). WAV is uncompressed PCM, so a 1-minute 44.1 kHz / 16-bit stereo clip is roughly 10 MB regardless of source bitrate. Converting back to WAV doesn't restore quality lost in the original Opus encode — it just unpacks the compressed samples into raw form so editors can read them.

Will this convert Opus and Vorbis audio inside WebM, or only one?

Both. WebM officially supports Vorbis (the original 2010 spec) and Opus (added in 2013). The decoder auto-detects which codec the file contains and produces a PCM WAV either way. If your file has multiple audio tracks, the default/first track is used.

Which sample rate should I pick — 44.1 kHz or 48 kHz?

Match the source if you can. WebM files recorded by browser MediaRecorder or WebRTC typically use 48 kHz Opus, so 48 kHz keeps the conversion sample-accurate. CDs and most music libraries use 44.1 kHz. Picking the "wrong" rate forces a resample that adds minor filtering artifacts but is usually inaudible — only pick 8/16/24 kHz if you specifically need a smaller file for speech or telephony.

Should I choose 16-bit, 24-bit, or 32-bit?

For speech, music distribution, or anything destined for streaming, 16-bit is fine and is what most DAWs default to. Pick 24-bit when handing off to a video editor or mastering engineer who needs headroom for further processing. 32-bit float is overkill for a source that was already lossy WebM — it doesn't add real precision, just larger files.

Can I extract just the audio without re-encoding to PCM?

This page always writes PCM WAV. If you want to keep the original Opus or Vorbis stream without a decode step (smaller file, identical quality), use the WebM to MP3 or a direct demux tool instead. WAV by definition is a PCM container, so a "WebM-to-WAV" conversion always involves decoding to raw samples.

What's the maximum WebM I can convert, and how long can the WAV be?

WAV's RIFF header uses a 32-bit unsigned integer for file size, capping output at about 4 GiB — roughly 6.8 hours of 16-bit / 44.1 kHz stereo, or 3.4 hours of 24-bit / 48 kHz stereo. For longer recordings (multi-hour lectures, all-day streams), trim the WebM first using the Audio Trim controls or split the source.

Why does my browser-recorded WebM have a wrong or missing duration?

Files written by MediaRecorder (Chrome screen recording, in-browser voice memos, WebRTC captures) often omit the duration field in the Matroska header — the file plays fine but seek bars and FFmpeg's -t flag get confused. The conversion still works because the decoder walks the whole stream; if downstream tools need a correct duration, the freshly written WAV will have an accurate one.

Can I trim the WebM before converting?

Yes. Use the Trim control to set a start time and duration so only the segment you want gets written to WAV. For more elaborate edits (multiple regions, fades, normalization), bounce the full file to WAV first, then open it in the Audio Cutter or any DAW.

Is this safer than uploading to a converter site?

The Conversion runs on our servers and your file is deleted shortly after — useful for confidential interviews, internal meeting recordings, or unreleased music. Compare with WAV to MP3 if you later need to compress for sharing, or WebM to MP4 if you actually wanted to keep the video.