Convert WebM to MP4

Transform your open-source web video format by google into MP4 format. Free, private, and browser-based.

How it works

  1. Upload WebM Files — Drag and drop your WebM files into the converter, or click to browse. Common sources: youtube (internal format), web applications.
  2. Convert to MP4 — The converter processes your files to MP4 format entirely in your browser. No files are uploaded to any server — your privacy is guaranteed.
  3. Download Results — Download your converted MP4 files instantly. For multiple files, download individually or as a ZIP archive.

Why convert WEBM to MP4

  • Ensure maximum compatibility — MP4 works on virtually every device and platform
  • Leverage MP4 advantages: universal playback on every platform
  • Overcome WebM limitations: no safari support on older versions
  • Upload to websites and platforms that require or prefer MP4 format

FAQ

Is WebM to MP4 conversion free?
Yes, Fileza.io converts WebM to MP4 completely free with no limits on file size or number of conversions. No hidden fees, no watermarks, and no account required.

Will I lose quality converting WebM to MP4?
Both WebM and MP4 use lossy compression. Output quality is excellent at high quality settings (85%+) — most people cannot see any difference.

Is it safe to convert WebM to MP4 online?
Absolutely. Unlike most online converters, Fileza.io processes your files entirely in your browser using WebAssembly. Your WebM files are never uploaded to any server — the conversion runs on your own device, keeping your files 100% private.

Can I convert multiple WebM files to MP4 at once?
Yes, Fileza.io supports batch conversion. Drag and drop multiple WebM files at once and they will all be converted to MP4 simultaneously. Download them individually or as a ZIP archive.

Does WebM to MP4 conversion work on mobile?
Yes, the converter works on any device with a modern web browser — iPhones, iPads, Android phones, and tablets. No app installation required.

Will the converted MP4 files be smaller or larger than WebM?
MP4 files are generally smaller than WebM files. The exact reduction depends on your quality settings and the content of your files.

How long does WebM to MP4 conversion take?
Most conversions complete in seconds. The exact time depends on file size and your device performance. Since processing happens locally in your browser, faster devices convert more quickly. Video files may take longer due to re-encoding.