Free WebM to MP4 converter
Convert a WebM recording to MP4.
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How it works
- Choose a WebM video.
- Click Convert to MP4.
- Preview and download the video.
MP4 compatibility
Video converts to H.264 and audio to AAC for broad playback support. This changes the encoding, not just the file extension.
Questions
Why can conversion take a while?
Your device decodes and re-encodes the video locally. Longer, higher-resolution recordings take more time and memory. Keep this tab open, or cancel and try a shorter clip.
Do my files leave my device?
No. Processing stays in your browser. Download your result before closing or reloading this tab.
Is it free?
Yes. No account, payment or watermark.
Which browsers work best?
Use a recent Chrome, Edge, Firefox or Safari. For video, use short clips and keep this tab open while processing. Older devices may need smaller files.