Convert MP4 Video files to Matroska Video format instantly. Free, fast, and private — no signup required.
Supports MP4 and more
Files are processed locally in your browser. Nothing is uploaded to a server.
The MP4 to MKV converter transforms MP4 Video files into Matroska Video format. Upload your .mp4 file and get a .mkv file instantly — no software to install, no account to create.
MP4: The universal video format. Works everywhere. MKV: Open container format supporting multiple tracks. Converting from MP4 to MKV is useful when you need the specific advantages of the MKV format — whether that's compatibility, file size, quality, or feature support.
The converter transcodes your MP4 video file to MKV format. Video and audio streams are re-encoded using appropriate codecs for the target container. You can adjust resolution, bitrate, and frame rate to control output quality and file size.
Getting Started
Drag and drop your file into the converter, or click to browse. Supports MP4 and more.
Configure output settings like quality, size, and format options. Defaults work well for most use cases.
Click "Convert" and your MKV file is ready in seconds. Free, unlimited, no account required.
Sharing videos across devices and platforms. Preparing content for social media, web embedding, or specific player requirements. Reducing file sizes for email or messaging.
FAQ
Upload your .mp4 file to the converter, and it produces a .mkv file automatically. Click Download to save the result. The entire process runs in your browser — nothing is uploaded to a server.
Yes. Completely free with no signup, no watermarks, and no file limits. You can convert as many files as you need.
Yes. You can set the bitrate, quality level, and other encoding parameters before converting. Higher quality means larger files.
Yes. Upload multiple .mp4 files and they all convert to .mkv format. Download them individually or as a batch.
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