Is there quality loss when converting MP4 to MKV?

Most MP4 to MKV conversions are lossless via remux. Our converter preserves original video quality during the mp4 to mkv conversion process.

Does the MP4 to MKV converter keep subtitles?

Yes, our mp4 to mkv converter attempts to retain subtitles if compatible. The conversion preserves subtitle tracks when possible.

Is this MP4 to MKV converter completely free?

Yes, our mp4 to mkv converter is completely free with no hidden fees or limitations. Convert unlimited MP4 files to MKV format at no cost.

What's the maximum file size for MP4 to MKV conversion?

Our mp4 to mkv converter supports files up to 2GB in size. All conversion happens locally in your browser for privacy and security.

Does the MP4 to MKV converter work on all devices?

Yes! Our mp4 to mkv converter works on Windows, Mac, and Linux. Any modern browser with WebAssembly support can run the conversion tool.

Free Online MP4 to MKV Converter

Convert your MP4 files to MKV format instantly with our powerful mp4 to mkv converter. Fast, secure, and completely free - no upload required.

No file uploads

100% secure processing

Unlimited conversions

Start Your MP4 to MKV Conversion

Upload your MP4 files and convert them instantly. No software installation required.

Choose files

Drag and drop or tap to select MP4 files

≤2GB

.mp4 only

All conversions run locally in your browser - completely private and secure

Why Choose Our MP4 to MKV Converter?

Our advanced mp4 to mkv converter offers the fastest and most secure way to convert MP4 files to MKV format.

Lightning Fast MP4 to MKV

Our mp4 to mkv converter uses WebAssembly technology for rapid conversion without quality loss. Process large MP4 files in minutes with our efficient mp4 to mkv tool.

100% Secure Processing

Your MP4 files never leave your device during mp4 to mkv conversion. All processing happens locally in your browser for maximum privacy and security.

Universal Compatibility

Convert MP4 to MKV format that supports advanced features like multiple audio tracks and subtitles. Our mp4 to mkv converter creates versatile video files.

How to Use Our MP4 to MKV Converter

Convert MP4 to MKV in just three simple steps with our free mp4 to mkv converter.

Upload Your MP4 File

Select your MP4 file by tapping upload or drag and drop it into our mp4 to mkv converter. Support for files up to 2GB in size.

Tap or drag MP4 files here

MP4 to MKV Conversion

Tap convert to start the conversion process. Our advanced algorithm handles the mp4 to mkv conversion locally in your browser with real-time progress tracking.

Converting MP4 to MKV...

Download MKV File

Once conversion is complete, download your high-quality MKV file instantly. Ready for advanced features and better compatibility.

Frequently Asked Questions

Everything you need to know about our mp4 to mkv converter tool.

Ready to Start Converting?

Join thousands of users who trust our mp4 to mkv converter for fast, secure, and high-quality conversion. Experience the best free online mp4 to mkv conversion tool available today.

No registration required • Completely free • Process unlimited files