---
title: 'Convert WebM to MP4 online (free, in-browser) - OpenClip'
description: 'Convert WebM video into MP4 that plays everywhere, straight from your browser. No uploads, no signup. Your video never leaves your device.'
canonical: 'https://openclip.app/tools/webm-to-mp4'
markdown: 'https://openclip.app/tools/webm-to-mp4.md'
---

[Tools](https://openclip.app/tools) Convert WebM to MP4 online (free, in-browser)

# Convert WebM to MP4 online (free, in-browser)

Convert WebM video into MP4 that plays everywhere, straight from your browser. No uploads, no signup. Your video never leaves your device.

1

Upload your WebM

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

2

Convert to MP4

The video is re-encoded to H.264 MP4 automatically.

3

Download the MP4

Save an MP4 that plays on any device or editor.

## Questions & answers

### Why will not my WebM file play in Premiere or on my phone?

Many players and editors do not support WebM or VP9. Converting to H.264 MP4 fixes playback and import almost everywhere.

### Does my file get sent anywhere?

No. The conversion runs locally in your browser, your video never leaves your device, and nothing is stored.

### Will I lose quality converting WebM to MP4?

A re-encode is required since the codecs differ, but high-quality defaults keep the result visually identical for normal use.

### Need the reverse or another format?

The [format converter](/tools/video-format-converter) also handles MP4 to WebM, MOV, and MKV.

## 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 to JPG](https://openclip.app/tools/video-to-jpg): Capture any frame as a full-resolution image.
- [Frame Extractor](https://openclip.app/tools/extract-frames-from-video): Pull single or batch stills from any video.
- [MOV to MP3](https://openclip.app/tools/mov-to-mp3): Pull the audio out of iPhone MOV videos.