Klipova

WEBM to MP4 converter

Convert WebM videos to MP4 for iPhone, editors and social media

Your file is deleted from our server within an hour. We never share or keep your videos.

WebM, everywhere

WEBM files come from browsers, screen recorders and downloads from the web. They play fine in Chrome or Firefox but often fail on iPhones, in video editors and when uploading to social networks. Converting to MP4 with H.264 video and AAC audio gives you a file those places accept.

Quality settings

  • High: best for editing and archiving; files are larger.
  • Balanced: a good mix of quality and size for everyday use.
  • Small file: ideal for messaging and quick sharing.

Combine them with a lower resolution — 1080p, 720p, 480p or 360p — when you need an even smaller file. Videos are never upscaled.

Tip

Recording your screen in the browser often produces WebM. Convert it to MP4 before adding it to a presentation or sending it to a colleague.

Supported sites and tools

All sources

How to convert WEBM to MP4

  1. Choose the WEBM file

    Drag the WEBM video into the box or press Choose file.

  2. Choose resolution and quality

    Keep the original resolution or make the file smaller, and pick High, Balanced or Small file.

  3. Convert and download

    Press Convert to MP4. Download the MP4 when the progress bar is full.

WEBM to MP4 questions

What is a WEBM file?

WEBM is a web video format that usually contains VP8, VP9 or AV1 video with Opus or Vorbis sound. Browsers play it well, but many phones, editors and social networks don't accept it.

Why does my WEBM not open on iPhone or in my editor?

Apple devices and many editing apps have limited WebM support. Converting to MP4 with H.264 and AAC makes the video work almost everywhere.

Is quality lost when converting WEBM to MP4?

WEBM uses different codecs, so the video has to be re-encoded. With the High setting the difference is very hard to see.

How long does it take?

Re-encoding takes a little time — typically a few minutes for a short clip, and less at lower resolutions. The progress bar shows how far along it is.

Are my files private?

Yes. Your upload is used only for the conversion and deleted, and the MP4 is removed from our server within an hour.