---
title: 'Convert video between MP4, WebM, MOV, and MKV (no upload) - OpenClip'
description: 'Change container and codec between MP4, WebM, MOV, and MKV. Pick the right format for your target platform without re-encoding twice. Runs in your browser, your video never leaves your device.'
canonical: 'https://openclip.app/tools/video-format-converter'
markdown: 'https://openclip.app/tools/video-format-converter.md'
---

[Tools](https://openclip.app/tools) Convert video between MP4, WebM, MOV, and MKV (no upload)

# Convert video between MP4, WebM, MOV, and MKV (no upload)

Change container and codec between MP4, WebM, MOV, and MKV. Pick the right format for your target platform without re-encoding twice. Runs in your browser, your video never leaves your device.

1

Upload your video

Drop any video file. We support most common formats.

2

Choose output format

Select MP4, WebM, MOV, or MKV and adjust quality settings.

3

Download converted video

Get your video in the new format, ready to use.

## Questions & answers

### My platform rejects my .mov file, will converting to MP4 fix it?

Usually yes. Most platforms expect MP4 (H.264 codec inside an MP4 container). Convert to MP4 with H.264 and the upload will accept it.

### Will conversion ruin my video quality?

Conversion re-encodes, which always loses a small amount of quality. You can pick a higher quality setting to minimize the loss, at the cost of file size.

### Does my video file get uploaded to a server?

No. Conversion runs in your browser via WebAssembly, your video never leaves your device, and we keep nothing.

### What if I just need a smaller file, not a different format?

Use the [video compressor](/tools/compress-video-online). It targets a specific file size without changing the format.

## 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.

- [M4V to MP4](https://openclip.app/tools/m4v-to-mp4): Convert Apple M4V files to standard MP4.
- [3GP to MP4](https://openclip.app/tools/3gp-to-mp4): Convert old phone videos to MP4.
- [Shorts Converter](https://openclip.app/tools/convert-video-to-youtube-shorts): Convert videos to vertical shorts.