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Rotina Diária

MP4 to WEBM

Convert MP4 videos to WEBM right in your browser, with no upload.

or drag and drop here · Ctrl+V to paste

Processed on your device. Your files aren't uploaded to any server.

How to use: MP4 to WEBM

  1. Select your MP4 video.
  2. Click Convert to WEBM.
  3. Download the converted video.

About this tool

What is MP4? MPEG-4 Part 14 is the most widely compatible video format, used by phones, YouTube, Instagram, and WhatsApp. It's ideal for sharing videos anywhere. It plays on nearly all devices and social media platforms.

Why convert to WEBM? An open video format made for the web, using VP9/AV1 codecs and Opus audio. It's a great choice for website videos and browser screen recordings—it's supported by all browsers, but not always by iPhones, video editors, or TVs.

Frequently asked questions

What's the difference between MP4 and WEBM?

Both use lossy compression. For compatibility: MP4—works on almost every device and social platform; WEBM—supported by all browsers, but not always by iPhones, video editors, or TVs.

Does it work in all browsers?

It works in current versions of Chrome, Edge, Firefox, and Safari that support WebCodecs. Processing uses your device’s video acceleration, so it’s usually faster than uploading the file to a website.

Is there a file size or video length limit?

We don’t set a limit. Very large files (several GB) depend on your device’s memory; on phones, we recommend videos that are a few minutes long or less.

Will the video lose quality?

When the codecs are compatible, the data is copied without recompression—so there's no quality loss, and it only takes seconds. Otherwise, the video is re-encoded in high quality.

Are my files uploaded to a server?

No. This tool runs entirely in your browser: your file is read and processed on your device, and not a single byte is sent over the internet. You can even disconnect from the internet after the page loads.

Is it really free? Is there a daily limit?

It's free with no daily limits. Processing happens on your device, so there's no per-use cost and no need to limit you.

Does it work on phones?

Yes. The site works in any modern browser on Android, iPhone, Windows, Mac, and Linux—no installation needed.

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