MKV to MP4 converter
Free MKV to MP4 converter that runs in your browser. Convert MKV video to MP4 privately — no upload, no sign-up, no watermark.
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Convert MKV video to MP4 right in your browser — no upload, no sign-up, completely free. Drop your file and download the result in seconds. Everything is processed on your own device and never sent to a server.
MKV (Matroska) is a flexible open container that can hold many video, audio and subtitle tracks. It is popular for high-quality video but is not supported by many players or social platforms. MP4 (H.264/H.265) is the most universally compatible video format. It plays on virtually every device, app and platform, which makes it the safe default for sharing. MP4 plays on virtually every device, app and social platform, which makes it the safest format to share.
How to convert MKV to MP4
- Add your MKV video. Drag your MKV file onto the drop zone or click to browse.
- Convert. Your video is converted to MP4 on your device. Larger files take a little longer.
- Download your MP4 file. Save the converted MP4 video straight to your device.
Features
- Private by default. Your video is converted in the browser and never uploaded.
- Plays everywhere. MP4 is widely supported, so the result plays where you need it.
- No watermark. The converted file is clean — no logo or watermark added.
- Free to use. No sign-up and no cost.
When to use it
- Convert MKV to MP4 for a device or platform that won’t play MKV.
- Make MKV footage easier to share by converting it to MP4.
- Prepare video for maximum compatibility across phones, social media and the web.
- Convert a clip from your phone or camera without installing any software.
Frequently asked questions
Is this MKV to MP4 converter free?
Yes. It’s completely free with no sign-up and no watermark on the output.
Is my video uploaded anywhere?
No. The conversion happens entirely in your browser, so your MKV file never leaves your device — ideal for private footage.
Are there file size limits?
Because everything runs in your browser, very large videos depend on your device’s memory and may be slow on phones. Desktop handles big files best.
What’s the difference between MKV and MP4?
MKV (Matroska) is a flexible open container that can hold many video, audio and subtitle tracks. It is popular for high-quality video but is not supported by many players or social platforms. MP4 (H.264/H.265) is the most universally compatible video format. It plays on virtually every device, app and platform, which makes it the safe default for sharing.