Free MP4 to MKV Converter
Browser-based MP4 to MKV conversion. No registration, no limits, no waiting.
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About MP4 to MKV Conversion
Transform your video files while preserving quality. Whether you're optimizing for web streaming, ensuring device compatibility, or preparing for professional editing, we handle the complex encoding.
How to Convert MP4 to MKV
Converting files has never been easier or more secure. MixConvert uses advanced browser-based technology to process your files instantly without uploading them to a remote server. Follow these simple steps to get started:
- Select Your Files: Click "Choose Files" or simply drag and drop your MP4 files (.mp4) into the upload area.
- Choose Output Format: Verify that MKV (.mkv) is selected as your target output format.
- Convert Instantly: Hit "Convert All" and watch as your files transform instantly using our browser-based engine.
- Download: Download your converted MKV files individually, or grab them all at once as a ZIP archive.
MP4 to MKV FAQ
How do I convert MP4 to MKV on my phone?
MixConvert works seamlessly on iOS and Android devices. Open this page in your mobile browser, select your MP4 files, and convert to MKV with the same ease as on desktop.
Is it safe to convert MP4 to MKV here?
Yes, your files never leave your device. We use WebAssembly technology to process MP4 files locally in your browser, making this the most private way to convert to MKV.
Is there a file size limit for MP4 to MKV conversion?
There are no arbitrary size limits. Since conversion happens locally, your device's RAM and processing power are the only constraints. Most modern devices handle files of any practical size.
How long does MP4 to MKV conversion take?
Most MP4 files convert to MKV in just a few seconds. Processing time depends on file size and your device's CPU. Large video files may take a bit longer.
Can I batch convert multiple MP4 files?
Yes! Select multiple MP4 files and convert them all to MKV simultaneously. You can then download each file or grab everything as a single ZIP archive.
Will MP4 to MKV conversion preserve my video quality?
We use high-quality encoding settings that preserve visual fidelity. While any re-encoding involves some processing, our engine is optimized to maintain quality close to your original MP4.
Understanding the Formats
MP4
MPEG-4 Part 14
The universal video format supported by virtually all devices and platforms. The go-to choice for video distribution.
MKV
Matroska Video
Flexible container that can hold unlimited video, audio, and subtitle tracks. Popular for high-definition video.
Reverse Conversion
MKVMP4More MP4 Conversions
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