Handytool
VideoRuns locally

WebM to MP4

Convert WebM videos to MP4 (H.264) in your browser — files never leave your device.

.webm
From
To

Higher quality = larger file. 75 is a good default.

About the WebM to MP4

Got a WebM clip from a download or screen recording and need it in MP4 for editing software, social media, or your phone? Handytool converts WebM to MP4 entirely in your browser — no uploads, no account, no waiting. MP4 (H.264) is the most universally compatible video format on Earth: every editor, phone, smart TV, and social platform plays it natively.

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.

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