Best Free Online Video Converter — No Upload, No Software, 100% Private

Why Most Online Video Converters Are Problematic

Most free online video converters require you to upload your file to their servers.

This creates several problems:

• Privacy — your video is on someone else's server
• Size limits — most cap at 100MB–500MB
• Speed — you wait for upload, processing, and re-download
• Security — sensitive footage is transmitted over the internet

The Better Way: Browser-Based Conversion

Our free video converter runs FFmpeg entirely in your browser via WebAssembly.

Nothing is ever uploaded. No servers involved. 100% local processing.

Advantages:

• No file size limit (only your device RAM)
• Instant start — no upload wait
• 100% private — files never leave your device
• No account required
• Free forever

Supported Formats

InputOutput

|-------|--------|

MP4MKV MKVMP4 MOVAVI AVIMOV WebMMP4 Any videoAny format

Powered by FFmpeg

FFmpeg is the world's most powerful open-source multimedia framework.

Used by YouTube, Chrome, VLC, and thousands of professional tools.

Our converter brings FFmpeg to your browser with no installation needed.

How It Works

1. FFmpeg is compiled to WebAssembly (WASM) — a binary format browsers can execute

2. When you first visit, the ~31MB engine downloads once and is cached

3. All subsequent conversions are instant — no repeat downloads

4. Your file is processed entirely in browser memory

Try It Free

Convert your video now — free, private, no upload required.