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WebM to MP4 Online Free — PrivaTools

TL;DR: Upload your file, click WebM, and download the result — free, browser-based, no sign-up, no watermarks. Files are processed and discarded immediately.

Convert WebM to MP4 online for free — turn Google's WebM (VP8/VP9) into H.264 MP4 for compatibility with iOS, older Android, and editing software.

Using WebM to MP4 doesn't require an account, an email address, or a paid plan. Your file is held in temp memory only for the duration of processing, then permanently unlinked. No watermarks, no upsells, no behavioural tracking.

How to Use WebM to MP4

  1. Upload a WebM video — Drop a WebM file (VP8 or VP9). Browser screen recorders and many web exports use WebM by default.
  2. Convert and download — Click Convert. The video is re-encoded as H.264 MP4 for compatibility with iOS, older Android, and most editing software.

Frequently Asked Questions

Why convert WebM to MP4?

WebM (VP8/VP9 codecs) isn't supported on iOS Safari, older Android, or in many editing programs. MP4 with H.264 is universal.

Does the audio survive?

Yes. WebM's Opus or Vorbis audio is re-encoded to AAC inside the MP4 container.

Will I lose quality?

Re-encoding always sacrifices a tiny amount of quality, but at high bitrates the result is visually identical to the source.

Last reviewed 2026-05-01 by the PrivaTools maintainers. Source code on (MIT-licensed, self-hostable).

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