WebM to MP4: why you need it and how to convert

WebM is a great modern format — smaller files, royalty-free. But it's not universally supported: some phones, editors, and platforms still refuse it. MP4 with H.264 is the format everything plays.

When you'll hit WebM

• Recording with certain screen-capture tools
• Downloading clips from some sites
• Exporting from open-source editors (OBS, Kdenlive)

How to convert

Our WebM to MP4 tool converts in one click: upload, hit convert, download your MP4. It re-encodes to H.264 at CRF 23 — visually identical for most content.

What you lose

Virtually nothing for normal use. The file will be slightly bigger (H.264 is less efficient than VP9), but compatibility wins. Need the reverse? Our Video Compressor can output WebM too.