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Online Video Format Converter - MP4, WebM, AVI in Browser

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Online Video Format Converter

Convert videos between MP4, WebM, and AVI directly in your browser. No upload to server - keep your files private.

Drag & drop your video here

or

Supports MP4, WebM, AVI, MOV, MKV, and more
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Frequently Asked Questions

You can convert your videos to MP4, WebM, and AVI. Input files can be in any common video format (MP4, WebM, AVI, MOV, MKV, FLV, etc.). The output codecs are carefully chosen for best compatibility: H.264/AAC for MP4, VP9/Opus for WebM, and MPEG-4/MP3 for AVI.

No. Everything happens locally in your browser using WebAssembly (FFmpeg). Your video never leaves your device, ensuring complete privacy and security. No server storage, no tracking.

The tool works with files up to about 500 MB, depending on your device's RAM. Very large files may slow down or crash the tab. For best performance, we recommend videos under 200 MB.

Conversion speed depends on your device's CPU and the video length/resolution. Because it runs entirely in the browser, it’s not as fast as server-based converters. However, it’s completely private and doesn't require an internet connection once loaded.

Yes, this tool is fully responsive and works on Android and iOS devices. However, conversion of large videos on mobile may be slower due to hardware constraints. We recommend using Wi-Fi and keeping files under 100 MB for a smoother experience.

Some quality loss is inevitable during re-encoding. The tool uses reasonable default settings to balance file size and quality. If you need advanced control (bitrate, resolution), please look for a professional desktop tool.

We recommend Chrome, Edge, or Firefox (latest versions). Safari has limited support for WebAssembly features needed by the video converter. If you're using Safari, you may experience slow performance or errors.

This tool is designed for video files only. For audio-only conversions, please try a dedicated audio converter tool. However, you can convert a video and later extract its audio with other software if needed.
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