MP4 to MKV Converter
Convert MP4 videos to MKV online. Free, fast, and no signup required.
Hoặc kéo thả tệp vào đây. Kích thước tệp tối đa 1GB.
Selected Files
In Conversion
Input format
MP4 video
MP4 is the most common video container for phones, cameras, browsers, social apps, and downloads. It is widely compatible, but some workflows need MKV for broader track, subtitle, or archive support.
Output format
MKV video
MKV is a flexible video container often used for high-quality video, subtitle tracks, multiple audio streams, and media library archiving. Convert MP4 to MKV when your player, editor, or storage workflow expects Matroska video.
How to convert MP4 to MKV online
Use this MP4 to MKV converter when you need a Matroska video file for playback, archiving, subtitle workflows, or media libraries. Upload your MP4, keep MKV selected as the output, and download the converted video when processing is complete.
The converter works in your browser with no account and no software install. Files up to 1 GB are supported, and uploaded files are processed securely for the conversion flow.
- 1 Upload your MP4 video file.
- 2 Choose MKV as the output format.
- 3 Open settings if you need to adjust codec, quality, bitrate, resolution, or audio options.
- 4 Click Convert to start the MP4 to MKV conversion.
- 5 Download your MKV video when processing is complete.
If you need the most universally playable file for phones, browsers, or social uploads, MP4 is usually the safer target. If you need a flexible archive or player-friendly container, MKV can be a better fit.
MP4 to MKV FAQ
Is this MP4 to MKV converter free?
Yes. Convertr lets you convert MP4 to MKV online for free with no registration, no watermark, and no software install.
Why convert MP4 to MKV?
MKV is useful for media libraries, subtitle workflows, multi-track video files, and players that prefer the Matroska container. Convert MP4 to MKV when compatibility with those workflows matters.
Can I convert large MP4 files to MKV?
Yes. You can upload MP4 videos up to 1 GB per file. This helps with longer recordings, downloads, exports, and media library files.
Will MP4 to MKV reduce video quality?
Quality depends on the conversion settings and source file. Use higher quality settings when preserving detail matters more than creating a smaller output file.
Are my MP4 files private?
Files are processed securely for conversion and automatically deleted after the conversion flow. You do not need to create an account.
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