SnapMedia

Free online converter

WEBM to MP4 Converter

Convert WebM to MP4 so the video plays on iPhones, in WhatsApp and in video editors. The video is re-encoded to H.264 in your browser.

No upload

Converted on your device

No sign-up

Free, no daily limit

No watermark

Your file, untouched

Batch

Several files at once

How to convert WEBM to MP4

  1. Add your WEBM files. Drag them onto the box above or click to choose them. You can add several at once.
  2. Check the target is MP4. It is already selected. Adjust the quality under Options if you want.
  3. Click Convert. The conversion runs in your browser — the file is never uploaded to a server.
  4. Download the MP4. When it finishes, click Download on each file.

When you need this

Screen recordings and browser captures that need to go into Premiere, iMovie, a presentation or a WhatsApp chat.

WEBM vs MP4

WEBM

Google’s open web video format (VP8/VP9 video, Vorbis/Opus audio). Browsers play it natively; iPhones, video editors and WhatsApp often do not.

Best for: embedding video on websites.

MP4

The universal video format. H.264 video with AAC audio in an MP4 plays on every phone, browser, TV and social network.

Best for: sharing, uploading to YouTube, Instagram or TikTok, and playing anywhere.

Will I lose quality?

If the video inside the WEBM already uses a codec MP4 supports — H.264 or HEVC, which is what phones, cameras and OBS produce — it is not re-encoded: it is copied into the new container. That takes seconds and the quality is identical. Only an incompatible codec is re-encoded, to high-quality H.264.

Have a link instead of a file?

Paste it into the YouTube MP4 downloader and skip the conversion.

Related conversions

WEBM to MP3MOV to MP4MKV to MP4AVI to MP4MP3 to MP4All conversions →

Frequently Asked Questions

How do I convert WEBM to MP4?
Drag the WEBM file onto the box above, check the target is MP4 and click Convert. As soon as it finishes a Download button appears. Nothing to install, no account needed.
Is it free to convert WEBM to MP4?
Yes, completely: no sign-up, no daily limit and no watermark. Your own browser does the conversion, so it costs us nothing and there is no reason to charge for it.
Are my files uploaded to a server?
No. The converter runs inside your browser: the file is read and converted on your device and never leaves it. That is why it is safe for private or work recordings.
Will I lose quality?
If the video inside the WEBM already uses a codec MP4 supports — H.264 or HEVC, which is what phones, cameras and OBS produce — it is not re-encoded: it is copied into the new container. That takes seconds and the quality is identical. Only an incompatible codec is re-encoded, to high-quality H.264.
Is there a file size limit?
Up to 1 GB per file. The limit is not a business one but the browser’s: all the work happens in its memory, and above that size some browsers close the tab. On a phone, stay well below it.
Can I convert several files at once?
Yes. Add as many WEBM files as you like and they are converted one after another with a single click. Each one can go to a different format.