Image → Tools

WebM to MP4 Converter

Convert WebM video to MP4 (H.264) for maximum device and platform compatibility. Processing happens entirely in your browser — no upload required.

Drop MP4 video or click to selectOutput: WEBM, OGG, MP4

How to webM to MP4 Converter

  1. Drop or select a WebM video file.
  2. MP4 (H.264) output is pre-selected.
  3. Click Convert and wait for encoding to finish.
  4. Download the MP4 file.

Private by design — all processing happens in your browser. Your images are never uploaded to a server.

Related tools

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Frequently asked questions

Why convert WebM to MP4?

MP4 (H.264) is supported by virtually all devices, apps, and platforms including iOS, Android, Windows, and macOS. If your WebM won't play somewhere, converting to MP4 usually fixes it.

Will video quality be preserved?

The converter uses H.264 with CRF 23, which is a high-quality setting. There may be minor quality change due to re-encoding, but the result looks essentially identical to the source.

Are my files kept private?

Yes. All conversion runs locally in your browser using WebAssembly. Your files never leave your device.