WebM Merger

Combine multiple videos into one file. Reorder clips, choose output format and quality—all in your browser.

Output: MP4, WebM, or MOV. Free, no sign-up. Your videos never leave your device.

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Drag & drop your videos

or click to browse • Add at least 2 videos to merge

Merge options

Output format, quality, resolution, and frame rate.

Related Tools

WebM Merger

Merge WebM videos into one. Free, client-side. No registration.

WebM is an open, royalty-free format (VP8/VP9 video, often Vorbis/Opus audio) designed for the web. It's well supported in Chrome, Firefox, Android, and many editing tools. Merging WebM files is useful when your sources are already WebM—you get one file that streams efficiently and plays in browsers and on Android without conversion.

When to use WebM Merger vs other formats

Use WebM when you're building for the web or want an open format. Choose WebM over MP4 when you need VP9's efficiency or when avoiding H.264 licensing matters. Use MP4 when you need iOS, Safari, or maximum compatibility. Use MOV for Apple-only workflows.

Compatibility

WebM plays in Chrome, Firefox, Edge, and Android. Safari and iOS have limited or no native WebM support; for those audiences, convert the merged result to MP4. Many video editors and tools support WebM.

Quality considerations

Merging WebM to WebM preserves quality when no re-encoding is needed. VP9 can match or beat H.264 quality at lower bit rates. If you mix WebM with other formats, the output may be re-encoded; use high quality settings.

Example use cases

  • Merge web-recorded or browser-captured WebM clips into one file.
  • Combine VP9/WebM exports from an editor for web playback.
  • Join screen or game captures in WebM for streaming or download.
  • Create one WebM from several clips for HTML5 video or PWA.
  • Merge WebM assets for Android or web-focused projects.

Powered by browser video APIs and optimized processing algorithms.

← All video formats (MP4, WebM, MOV)