MP4 to WebM Converter
Haikit converts MP4 video to WebM in your browser, for free. Add your video, choose the quality, and download the WebM. WebM is an open format that works well on websites and in browsers.
Drop a video here
MP4, MOV, MKV, WebM, AVI and more. Files up to 50 MB.
You can also paste with Ctrl+V.
Your files are converted on your device and are never uploaded.
How to use MP4 to WebM
- 1
Add your MP4 video. Files up to 50 MB are free.
- 2
WebM is already selected. Choose a resolution and quality if you want a smaller file.
- 3
Click Convert and download the result. Larger videos take longer, because the work happens on your device.
What is free and what is paid
Free, no sign-up
- Convert one video at a time to MP4, MOV, MKV, WebM, AVI or GIF
- Choose the resolution and quality
- Make a video smaller
- Files up to 50 MB
Questions
Is WebM good for websites?
Yes. WebM is supported by Chrome, Firefox, Edge and Safari, and is designed for the web. It is not supported by every video editor, so use MP4 for editing and sharing.
Is MP4 to WebM free?
Yes. You can convert one video at a time, up to 50 MB, for free with no sign-up. Paid plans convert up to 10 videos at once and handle files up to 300 MB.
Are my files uploaded?
No. The conversion runs inside your browser, so your file never leaves your device. The converter itself downloads once (about 30 MB) and your browser keeps it for next time.
Do I need to install anything?
No. Haikit works in the browser on Windows, Mac, Linux, iPhone and Android. There is nothing to download or install.
Updated October 2026