MP4 to WEBM Converter

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Upload Video

Drag & drop or click to select a video file

  1. Upload an MP4 file.
  2. Optionally trim the time range.
  3. Click Convert and wait for completion.
  4. Download the WEBM file.

When should you convert MP4 to WebM?

WebM uses open codecs (VP9/AV1) - royalty-free and small, the top choice for embedded web video. If your video lives on a website, WebM saves bandwidth.

WebMWebsite embeds, HTML5 video

Open, royalty-free, top choice for web; smaller.

MP4 (H.264)Universal playback and sharing

Widest compatibility for local and social use.

Tip

Modern browsers support WebM; keep an MP4 as a fallback.

Help

FAQ

Why does WEBM conversion take time?Show
WEBM output usually requires transcoding which is CPU intensive in the browser.
Is my file uploaded?Show
No. The conversion runs locally by default.

How to convert MP4 to WEBM

  1. Upload an MP4 file.
  2. Optionally trim the time range.
  3. Click Convert and wait for completion.
  4. Download the WEBM file.

Privacy

Full guide

MP4 to WEBM Converter

Convert MP4 videos to WEBM format for web delivery and streaming.

Features

  • Web Optimized: Perfect for HTML5 video and streaming
  • Time Trimming: Extract only the segments you need
  • Quality Options: Adjust output quality and file size
  • 100% Local Processing: All conversion happens in your browser

Supported Formats

Input: MP4 video files

Output: WEBM (VP9/Opus)

Tips

  • WEBM is ideal for web embedding and streaming
  • VP9 codec provides excellent compression
  • Conversion requires transcoding (slower than remux)