Convert WEBM to MP4
Convert WEBM to MP4 free in your browser. No upload, no signup, no watermark. Files stay on your device.
drop a .webm file
or click to browse
max 500 MBrelated
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how to convert webm to mp4
Add your WEBM file
Drag and drop your WEBM file into the drop zone above, or click the box to browse for a file.
Click Convert
The conversion happens locally in your browser. No upload, no server, no waiting in queue.
Download the MP4 file
When the conversion finishes, the MP4 file is ready to download. Save it anywhere on your device.
FAQ
common questions
Is the WEBM to MP4 converter free?
Yes. Every conversion on this site is free, with no signup, watermark or file count limit.
Are my files uploaded to a server?
No. Conversion runs entirely in your browser using ffmpeg.wasm. Your files never leave your device, so we cannot see them even if we wanted to.
Is there a file size limit for WEBM to MP4?
Files up to about 500 MB work reliably. Larger files may run out of memory depending on your device.
Does it work offline?
Once this page has loaded, yes. You can disconnect from the internet and the converter will still work. Reloading the page does require connectivity.
Will my WEBM file lose quality when converted to MP4?
It depends on the formats involved. Converting between lossy formats (JPG, MP3) re-encodes data and slightly reduces quality. Lossless formats (PNG, WAV, FLAC) preserve everything. Pixel dimensions and color depth are preserved for image conversions.