Convert video files to different containers, adjust resolution scales, or extract audio tracks entirely in your browser. This tool runs 100% locally client-side using browser-native Web Audio, Canvas Streams, and MediaRecorder APIs, so your files are never uploaded to a server.
Key Features of Video & Audio Converter
- WebM Video Conversion Convert high-resolution video streams to browser-optimized, web-ready WebM containers.
- WAV Audio Extraction Extract pristine-quality WAV audio channels from any supported video track.
- Resolution Scaling Multipliers Scale output sizes (0.25x, 0.5x, 0.75x, 1x) to optimize bandwidth and file sizes.
- Hardware-Accelerated Transcoding Leverage native hardware-accelerated codecs directly on your local device.
- Real-Time Logging Monitor encoding steps, dropped frames, and progress logs in real-time.
Video & Audio Converter Examples
Extract WAV Audio
Extract a clean audio track from a loaded MP4 file in WAV format.
Input
Input: lecture.mp4, Format: WAVOutput
Result: lecture.wavScale and Convert Video
Downscale an MP4 video to 0.5x resolution and transcode to WebM.
Input
Input: presentation.mp4, Output: WebM, Scale: 0.5xOutput
Result: presentation-scaled.webmHow to Use Video & Audio Converter
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1. Upload Your Video
Drop a video file (MP4, WebM, OGG, MOV) onto the drop zone or click to browse. File info and a preview appear once loaded.
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2. Choose Output Format and Settings
Select WebM video or WAV audio as the output. Optionally adjust the resolution scale before transcoding.
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3. Transcode and Download
Click Start Transcoding Video. Progress is shown in the status log. When complete, download the converted file.
Common Use Cases for Video & Audio Converter
- Convert MOV to WebM Convert bulky MOV or MP4 recordings into highly-optimized WebM formats for websites.
- Isolate Audio Soundtracks Extract clean vocal tracks or background audio stems as high-fidelity WAV tracks.
- Optimize Web Video Assets Downscale videos to lower resolutions (like 480p or 720p) to speed up website loads.
The Technical Details
Interfaces directly with the browser’s hardware-accelerated MediaRecorder API, recording Canvas and AudioNode streams client-side.
Frequently Asked Questions
Which output formats are supported?
This tool outputs WebM video (VP8/VP9 via MediaRecorder) or WAV audio. These formats use browser-native codecs without any server-side processing.
Why does transcoding take a while?
The browser re-encodes the video in real-time using MediaRecorder. Transcoding speed depends on your device's hardware and the video's length and resolution.
Can I extract just the audio track?
Yes. Select WAV audio as the output format to extract and download the audio track from any supported video file.
Is my video uploaded to a server?
No. All transcoding uses browser-native APIs (Canvas Streams and MediaRecorder). Your video never leaves your device.