MP4 to MKV is ideal when you want a flexible container format for archiving, storage, or compatibility with players that handle Matroska well.
MKV is a popular container for keeping video and audio together in a robust format. If you need maximum compatibility for sharing, use MKV to MP4.
Best for
- Local archiving and library organization
- Broad player support (VLC, many desktop players)
- Container flexibility for content management
This tool runs entirely in your browser using FFmpeg WebAssembly. No uploads.
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.