WebM to MP4 Converter
Convert WebM to MP4 in your browser — free, private, no upload.
Edit this video with AI
Open Edit Video in the LoopStook AI studio.
About this tool
Convert WebM video to MP4 online for free. Runs in your browser with ffmpeg — no upload, no limits.
Frequently asked questions
Is the webm to mp4 converter free?
Yes — it runs entirely in your browser, so it's free, private, and your files never leave your device.
Is there a file size limit?
Conversion happens on your device, so the practical limit is your machine's memory. Very large files may be slow.
Related free tools
Go further
Turn this into finished creative
LoopStook's AI studio takes you from a free utility to video, image, and audio generation — every model in one place.