Free Tool
Convert WebM
to MP4 for Free.
Upload your WebM file and get a high-quality MP4 in seconds. Files are processed in your browser, never uploaded.
Free Tool
Upload your WebM file and get a high-quality MP4 in seconds. Files are processed in your browser, never uploaded.
Join 5M+ users who rely on Zight to increase their productivity
Free Converter
Drag your file here or click to browse
WebM files, up to 2GB
Is this tool working for you? Let us know
How It Works
01
Upload WebM File
Select a WebM file from your device, or drag it into the box above.
02
Automatic Conversion
The converter runs right in your browser — watch the progress bar as it works.
03
Download MP4
Download your new MP4 file instantly, or convert another one.
File Quality
WebM is great for the web but chokes in iMessage, editing apps, and older devices. MP4 plays everywhere — and Zight converts without inflating the file size.
FAQ
Yes, completely free. No account or credit card is required.
No. This tool runs entirely in your browser — your files are processed on your own device and never uploaded to a server.
Yes, though processing happens on your device, so very large files take longer on slower machines.
MP4 is one of the most widely supported formats — it works on iOS, Android, Windows, macOS, web browsers, and virtually every player and editor.
No account needed. Files never leave your browser.