MKV is the container behind most rips, OBS recordings, and downloads, and plenty of players, phones, and editors refuse to open it. Convert it to an MP4 that plays everywhere, right in your browser. The file never leaves your device.
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MKV is a container, not a codec, and many players, TVs, phones, and editing apps simply do not read it. Converting to MP4 with H.264 video and AAC audio produces a file that plays almost everywhere.
The video is re-encoded with H.264 at a high-quality setting, so there is a small, usually invisible loss. That trade is what makes the result compatible with nearly every device.
No. The conversion runs entirely in your browser, so the file never leaves your device. Files up to 500 MB are supported, free and without a watermark.