---
title: 'Convert MKV to MP4 online (keep quality, no upload) - OpenClip'
description: 'Repackage MKV files into MP4 for phones, editors, and social platforms, right in your browser. Your video never leaves your device.'
canonical: 'https://openclip.app/tools/mkv-to-mp4'
markdown: 'https://openclip.app/tools/mkv-to-mp4.md'
---

[Tools](https://openclip.app/tools) Convert MKV to MP4 online (keep quality, no upload)

# Convert MKV to MP4 online (keep quality, no upload)

Repackage MKV files into MP4 for phones, editors, and social platforms, right in your browser. Your video never leaves your device.

1

Upload your MKV

Drop any .mkv file. Processing happens in your browser.

2

Convert to MP4

The file is remuxed or re-encoded to MP4 automatically.

3

Download the MP4

Save an MP4 that works on phones, editors, and social platforms.

## Questions & answers

### Will a large MKV take forever to re-encode?

When the MKV already uses H.264 and AAC the streams are remuxed into MP4 without re-encoding, which is near-instant. Other codecs trigger a full re-encode.

### Does my MKV get uploaded?

No. Everything runs in your browser, your video never leaves your device, and we keep nothing.

### Will subtitles or multiple audio tracks carry over?

The primary video and audio track are converted. Embedded subtitle tracks are not burned in, so extract those separately if you need them.

### Want a different container?

Use the [video format converter](/tools/video-format-converter) for WebM, MOV, or MKV output.

## Stop editing one clip at a time.

OpenClip finds your best moments, reframes them face-aware for every platform, writes the captions, and posts them. One upload, a week of content.

[Start free](https://openclip.app/register)

### More free tools

Keep editing inside the same browser-only toolkit.

- [Video Rotator](https://openclip.app/tools/rotate-video-online): Rotate or flip videos 90°, 180°, or mirror.
- [Video to GIF](https://openclip.app/tools/convert-video-to-gif): Create animated GIFs from video clips.
- [Crop for TikTok](https://openclip.app/tools/crop-video-for-tiktok): Crop any video to the TikTok 9:16 frame.