MKV to MP4 Converter
Convert MKV (Matroska) video files to MP4 format directly in your browser. Free, fast, and private — no files are uploaded to any server.
Drop files here or click to browse
Max 10240.0 MB per file · drop multiple for batch
100% private — files never leave your device
·Free — no sign up, no watermark
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How to Use MKV to MP4 Converter
- Upload your MKV file by dragging it in or clicking Browse
- MP4 is pre-selected — adjust quality and resolution if desired
- Click Process to start the conversion
- Download the universally compatible MP4 file
Features
- Convert MKV to MP4 with H.264 encoding for universal playback
- Preserve original video and audio quality
- Adjustable quality presets — fast encoding or maximum fidelity
- Optional resolution downscaling to 1080p, 720p, or 480p
- Works offline once the page loads — no server connection needed
- No watermark, no sign-up, no limits
Frequently Asked Questions
- Why convert MKV to MP4?
- MP4 is the most widely supported video format. While MKV can store multiple subtitle and audio tracks, MP4 plays everywhere — phones, social media, video editors, and web browsers.
- Will I lose quality converting MKV to MP4?
- Virtually none. With the High quality preset the re-encode preserves nearly all detail. If both files use H.264 internally the quality difference is imperceptible.
- Are subtitles preserved when converting MKV to MP4?
- MP4 has limited subtitle support compared to MKV. Embedded subtitle tracks may not carry over. For permanent subtitles, use our Auto Subtitles tool to burn them into the video.
- How long does the conversion take?
- Speed depends on file size and your device. A typical 1 GB MKV converts in 1-3 minutes on a modern laptop. Desktop machines are faster.
- Is there a file size limit?
- Files up to 2 GB are supported. Processing happens entirely in your browser, so larger files just need more time.