Convert MKV to MP4

Convert MKV to MP4 locally for compatibility and easy sharing.


MKV to MP4 is perfect when you have an MKV file that won’t play on certain devices or won’t upload to certain platforms. MP4 is widely accepted and easy to share.

If you want a smaller web-first output, convert to MP4 first, then consider MP4 to WebM.

Best for

  • Platform uploads and universal playback
  • Making MKV files compatible with mobile devices
  • Sharing videos with clients and teams

Why use Client Tools?

  • Privacy-First & Secure: All processing happens directly in your browser. We never upload your files to any server.
  • Corporate Grade Security: Ideal for handling sensitive documents, contracts, and NDA-protected images. Since data never leaves your device, it is impossible for third parties to intercept it.
  • No Limits: Convert as many files as you want, of any size (limited only by your device's RAM).
  • Fast & Offline Capable: Works instantly without waiting for network uploads.

How it works

Unlike other converters that require you to upload your files to a cloud server (which creates a privacy risk), Client Tools uses advanced WebAssembly technology to run professional image processing software directly inside your web browser.