WEBM to MP4

WEBM is the format many browsers, screen recorders and web apps use when you record or download video. It is great on the web, but iPhones, WhatsApp, Instagram and many video editors expect MP4.

This converter re-encodes the VP8, VP9 or AV1 video in your WEBM file to H.264, and the Opus or Vorbis audio to AAC, giving you an MP4 that plays everywhere.

How to convert WEBM to MP4

1. Upload your WEBM video.
2. Choose the quality and, optionally, a resolution.
3. Click Convert, wait for the progress bar and download your MP4.

WEBM to MP4 features

• High-quality H.264 video and AAC audio for universal playback.
• Works with VP8, VP9 and AV1 WEBM files.
• Ideal for screen recordings from browser tools and online meetings.
• Resolution presets to make the MP4 smaller.

Frequently asked questions

Why can't I play WEBM on my iPhone?

Many iPhone apps and older iOS versions do not support the VP9 and Opus codecs used in WEBM. MP4 with H.264 and AAC plays on every iPhone.

Does WEBM to MP4 conversion lose quality?

The video is re-encoded with high-quality settings. In normal viewing the result looks the same as the original.

Why does the conversion take some time?

WEBM video cannot be copied into MP4 in a widely playable way, so every frame is re-encoded. Longer videos take longer.

What is the limit?

Files up to 500 MB and 60 minutes.

Privacy, limits and file safety

Your files are processed on our own server, are never shared with anyone and are deleted automatically 60 minutes after processing. You can upload files up to 500 MB and 60 minutes long. No sign-up, no watermark and no software to install: it works in any modern browser on Windows, Mac, Android and iPhone.

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