WEBM to MP4 Converter

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Upload Video

Drag & drop or click to select a video file

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

Why convert WebM to MP4?

WebM uses open codecs (VP8/VP9/AV1) - royalty-free and web-friendly, often smaller. But many devices and editors only accept H.264 MP4. Here is the tradeoff.

WebMWebsite embeds, HTML5 video

Open, royalty-free, ideal for web; usually smaller.

MP4 (H.264)Local playback, editing, sharing

Widest compatibility, works on older devices and editors.

Tip

If it only needs to play in a browser, WebM often saves bandwidth.

Help

FAQ

Why is WEBM conversion slower?Show
WEBM files often need transcoding for MP4 compatibility. Transcoding is CPU intensive in the browser.
Is my file uploaded?Show
No. The conversion runs locally by default.

How to convert WEBM to MP4

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

Privacy

Full guide

WEBM to MP4 Converter

Convert WEBM videos to MP4 for universal playback on any device.

Features

  • Web Video Support: Handle WEBM from screen recordings and web downloads
  • 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: WEBM, WebM video files

Output: MP4 (H.264/AAC)

Tips

  • WEBM typically requires transcoding to MP4 (slower than remux)
  • Browser-based transcoding uses your CPU, may be slow for large files
  • Consider trimming to shorter segments for faster conversion