How does the video format converter work?

It uses FFmpeg compiled to WebAssembly, running entirely in your browser. The tool re-encodes the video into your chosen container format using the selected video and audio codecs. No data is ever sent to a server.

Which formats and codecs are supported?

You can convert between MP4, WebM, AVI, MOV, and MKV. Video codecs include H.264, H.265, VP8, and VP9. Audio codecs include AAC, MP3, Opus, and Vorbis — the available options are automatically filtered by the chosen container format.

Are my video files uploaded to a server?

No. All processing happens 100% in your browser via WebAssembly. Your video files never leave your device — complete privacy is guaranteed.

Video Format Converter

Convert video files between formats — MP4, WebM, AVI, MOV, MKV. Choose video and audio codecs, quality preset, and resolution. 100% in your browser using FFmpeg WASM. Your files never leave your device.

Your data never leaves your device

Frequently Asked Questions

How does the video format converter work?

It uses FFmpeg compiled to WebAssembly, running entirely in your browser. The tool re-encodes the video into your chosen container format using the selected video and audio codecs. No data is ever sent to a server.
Which formats and codecs are supported?

You can convert between MP4, WebM, AVI, MOV, and MKV. Video codecs include H.264, H.265, VP8, and VP9. Audio codecs include AAC, MP3, Opus, and Vorbis — the available options are automatically filtered by the chosen container format.
Are my video files uploaded to a server?

No. All processing happens 100% in your browser via WebAssembly. Your video files never leave your device — complete privacy is guaranteed.