MKV to MP4 Converter
Convert MKV videos to universally compatible MP4 for any device.
Video Converter
Convert videos between different formats (powered by WebCodecs)
Why Convert MKV to MP4?
MKV (Matroska) is a popular container for high-quality video content but lacks universal device support. Many smart TVs, game consoles, and mobile devices cannot play MKV files natively. Converting MKV to MP4 ensures your videos play everywhere while maintaining excellent quality.
Features
100% Private
Files never leave your device. All processing happens in your browser.
Instant Conversion
No waiting for server uploads. Convert MKV to MP4 in seconds.
Free & Unlimited
No signup, no limits, no watermarks. Convert as many files as you need.
Batch Support
Upload multiple files and convert them all at once with consistent settings.
Frequently Asked Questions
Why convert MKV to MP4?
While MKV is great for storing high-quality video, many devices and platforms do not support it. MP4 is the most universally compatible format, working on smartphones, tablets, smart TVs, game consoles, and all major streaming platforms.
Will I lose quality converting MKV to MP4?
If both files use the same H.264 codec, conversion can be nearly lossless as it may only require remuxing. When re-encoding is needed, quality loss is minimal at high bitrate settings.
What happens to subtitles in my MKV file?
MKV often contains embedded subtitle tracks. The primary video and audio streams are converted, but soft subtitles may not transfer. Hardcoded (burned-in) subtitles are always preserved.
How long does MKV to MP4 conversion take?
Conversion time depends on file size and video length. A typical 1-hour 1080p video may take a few minutes. Browser-based conversion works best for files under 500MB.
Is this MKV to MP4 converter safe and private?
Yes. All conversion happens locally in your browser using WebAssembly. Your MKV files are never uploaded to any server, ensuring complete privacy.
How It Works
This converter uses your browser's built-in WebAssembly to process files locally. Your MKV files are decoded and re-encoded as MP4 entirely on your device. Nothing is uploaded to any server.
More Tools
Explore Other Free Tools
AI-Powered
Explore AI Apps
AI Video Generator
Create viral video content with AI-powered motion and animation
Try it nowImage to Video AI
Transform any image into a stunning video. Animate photos with AI-powered motion, cinematic camera moves, and smooth transitions.
Try it nowCharacter Swap
Replace characters in videos while preserving scene lighting and motion. Powered by Wan 2.2.
Try it now