MP4 to MKV Converter - Transform Videos to Matroska Format Free
The most reliable way to convert MP4 videos to MKV (Matroska) format. MKV containers support multiple video tracks, audio streams, and subtitle files in a single container. All processing happens in your browser - your files never leave your device.
MP4 to MKV Video Converter
Upload your MP4 file and convert it to MKV format with preserved quality
Drop your video file here
or click to browse files
Supported formats: MP4, AVI, MOV, WEBM
Maximum file size: 1 GB
Loading FFmpeg... Please wait while the video converter initializes.
Usage Tips
- • All conversions are processed locally in your browser for privacy
- • Maximum file size: 1024MB
- • Higher quality settings may take longer to process
- • Use a modern browser like Chrome, Firefox, or Safari for best results
How to Convert MP4 to MKV in 3 Simple Steps
Upload Your MP4 File
Drag and drop your MP4 video file or click to browse. Files up to 1GB supported. Your file stays secure on your device throughout the conversion process.
Choose Conversion Settings
Select your preferred video quality and encoding options. MKV format preserves original quality while supporting advanced features like chapters and multiple subtitles.
Download Your MKV File
Click convert and download your MKV file instantly. The Matroska container will preserve all video quality and metadata from your original MP4.
Media Server Optimization
Privacy & Security
All conversion happens locally in your browser. Your files never leave your device, ensuring complete privacy and security.
Lightning Fast
Instant conversion without uploading or downloading. No waiting time, no file size limits, just pure speed.
High Quality Output
Maintain original quality with advanced conversion algorithms. Choose from multiple quality settings to suit your needs.
Completely Free
No hidden costs, no subscriptions, no watermarks. Use our converter as many times as you want, absolutely free.
MP4 to MKV Converter FAQ
What is MKV format and why convert MP4 to MKV?
MKV (Matroska Video) is an open-source container format that can hold unlimited video, audio, and subtitle tracks. It's ideal for complex media files, archival purposes, and media server applications where you need multiple language options or advanced features.
Will converting MP4 to MKV improve video quality?
Converting MP4 to MKV won't improve the original video quality, but MKV containers can preserve quality better and support advanced features like multiple audio tracks, subtitles, and chapter markers that MP4 might not handle as well.
Are MKV files larger than MP4 files?
MKV files can be slightly larger due to the container overhead and additional metadata storage capabilities. However, the difference is usually minimal (1-5%) and the benefits of advanced features often outweigh the small size increase.
Can I play MKV files on all devices?
MKV support has improved significantly. Most modern media players, smart TVs, and streaming devices support MKV playback. For older devices, you might need to use VLC or similar universal media players.