MKV to MP4 Converter
MKV in.
MP4 out.
+
Drop a video here
or choose a file · MP4, MOV, WebM, MKV · processed on your device
To convert MKV to MP4, drop your MKV video in, check that MP4 is selected and press Convert to MP4. When the codecs allow it the video is copied without re-encoding, so it is fast and lossless; otherwise it's re-encoded on your device.
How to convert MKV to MP4
- Drop a MKV file into the box above.
- Make sure MP4 is selected (Resolution "Original" keeps full quality).
- Press Convert to MP4 — the file downloads when it's ready.
Video formats at a glance
| Format | Usual codecs | Plays on | Typical use |
|---|---|---|---|
| MP4 | H.264 / HEVC + AAC | Everything — phones, PCs, TVs, websites | Sharing and uploading |
| MOV | H.264 / HEVC + AAC | Apple devices, most editors | iPhone recordings, Final Cut |
| WebM | VP9 / AV1 + Opus | Browsers, Android | Web video |
| MKV | Almost any | VLC and media players | Downloads, archives with subtitles |
MKV to MP4 without quality loss
Most MKV files contain H.264 or HEVC video that MP4 supports directly, so the video is copied rather than re-encoded and keeps its exact quality. Subtitles and extra audio tracks are dropped; the main video and audio track are kept.
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Frequently asked questions
- Why convert MKV to MP4?
- MKV is a flexible container popular for downloads, but many TVs, phones and editors can't open it. MP4 (H.264/AAC) is the universal video format that plays on every phone, computer, TV and website.
- Are my files uploaded?
- No. Processing happens in your browser using your device's built-in, hardware-accelerated video engine (WebCodecs), so your files never leave your device.
- How long does it take?
- Usually a fraction of the video's length on a modern computer or phone, because your device's video hardware does the work. Large 4K files take longer, and very large files are limited by your device's memory.