WebM to MP4

WebM to MP4 features

• 01

  Universal compatibility

  MP4 with H.264 plays everywhere — iPhone, Android, smart TVs, Premiere, Final Cut, Instagram, TikTok, YouTube. WebM is web-friendly but unsupported by most editors and mobile galleries; MP4 fixes that instantly.

• 02

  Quality slider for fine control

  Use the 1–100 slider to balance file size against visual fidelity. A setting of 75–85 produces results indistinguishable from the source on most displays.

• 03

  100% private, runs in your browser

  Powered by FFmpeg compiled to WebAssembly, conversion happens locally. Your video file never reaches a server and nothing is logged or stored.

WebM to MP4 FAQ

How do I convert WebM to MP4?

Drop your WebM file onto the upload area (or click Choose file), adjust the quality slider if needed, then click Convert. Download the MP4 file when conversion is complete.

Why convert WebM to MP4?

WebM is great for web embedding but most video editors, phones, and social media apps don't accept it. MP4 (H.264) is the universal standard — convert to MP4 when you need a file that 'just works' anywhere.

Can I import the MP4 into iMovie / Premiere / DaVinci Resolve?

Yes. The output is a standard MP4 with H.264 video and AAC audio, which all major video editors accept natively without transcoding.

Will I lose quality converting WebM to MP4?

Some, since H.264 is a different codec from VP9. At a quality setting of 80 or above, the difference is barely perceptible. Push higher (95–100) for maximum fidelity.

Is my video uploaded to a server?

No. The converter runs entirely inside your browser using FFmpeg WebAssembly. Your video files never leave your device and nothing is stored or logged.