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Video Converter

Convert video files between WebM and MP4 formats directly in your browser using canvas stream encoding with zero server uploads.

In-Browser

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About Video Converter

Runs in your browser

Convert a video your browser can play to WebM or, where supported, MP4. This is useful for short clips intended for web playback or sharing. Input format support varies by browser; a MOV or MKV extension alone does not guarantee that the file can be decoded.

The browser decodes a supported source video, draws frames to a canvas, and records the result using a MediaRecorder format available in that browser. Output format support varies by browser; the tool cannot decode every MOV, MKV, or AVI file or guarantee MP4 output on every device.

Longer videos (e.g. over 30 minutes) require more local processing time. Processing speed and format support depend on the browser, device memory, and source file. Keep the original material supplied to Video Converter until its converted Video has been checked for the intended use.

How It Works

The browser decodes a supported source video, draws frames to a canvas, and records the result using a MediaRecorder format available in that browser. Output format support varies by browser; the tool cannot decode every MOV, MKV, or AVI file or guarantee MP4 output on every device.

🔒 100% Client-Side In-Browser Execution: All processing occurs locally in your device memory. No files, documents, or data are transmitted over the internet or stored on remote servers.

How to Use Video Converter

1

Select a video that your browser can play.

2

Choose an output format offered by your browser and adjust resolution or bitrate.

3

Convert locally and preview the result.

4

Download the output and check playback on your target device.

Supported Formats

MP4WebMMOVMKVAVI

Key Capabilities

Browser-supported video conversion without a file upload
WebM output on supported browsers
MP4 output only where the browser supports MediaRecorder MP4
Resolution and bitrate controls

Application Scenarios

Converting iPhone MOV files or WebM clips to universally playable MP4 format
Converting videos for web embedding, presentations, or editing software

Technical Constraints

•Longer videos (e.g. over 30 minutes) require more local processing time.

Frequently Asked Questions about Video Converter

MP4 (with H.264 video) is universally supported across virtually all web browsers, smartphones, TVs, and editing programs.

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