Convert WEBM files to MP4 online, instantly, and for free. No software installation required. Your files are processed securely and deleted after conversion.
Drop a file or click to browse
Images, Documents, Audio, Video — up to 100 MB free
WEBM is an open-source video format designed for the web. It offers excellent compression and is supported by all modern browsers.
MP4 is the most widely used video format. It's compatible with virtually all devices and platforms.
Upload your file
Drag and drop your WEBM file onto the converter above, or click to browse.
Select output format
MP4 will be pre-selected. You can change it to any compatible format.
Click Convert
Arc will process your file instantly. Images are converted in your browser — no upload needed.
Download your file
Click the Download button to save your converted MP4 file.