WebM is an open-source video format optimized for web browsers — smaller than MP4 for web use.
1
Open Fourmeld File Converter
Go to fourmeld.com/files.
2
Upload your MP4 file
Click Upload and select your MP4 file.
3
Select WebM as output
Choose WebM as the output format.
4
Download converted file
Click Convert and download your WebM file.
Tips
- Keep original file as backup
- Download result promptly
- Works on any browser and device
FAQs
Is this free?
Yes — 100% free, no signup.
Works on mobile?
Yes — Chrome or Safari on phone.
File size limit?
No limits.
Convert MP4 to WebM Free
Convert audio, video and documents between any format — 100% free.
Convert Files Free on Fourmeld →