Convert GIF to WebM Online Free

WebM is the open-source video format built for the web. Converting a GIF to WebM produces a file that is HTML5-native, often smaller than equivalent MP4, and free from any patent or royalty restrictions. The GIF to video tool supports WebM output alongside MP4 — just select WebM before converting.

For embedding video on a website or web app where you control the player, WebM is often the better technical choice over MP4.

WebM vs MP4 for GIF Conversion — Key Differences

Factor	WebM (VP8/VP9)	MP4 (H.264)
Royalties	Royalty-free, open-source	Patent-licensed (H.264)
Browser support	Chrome, Firefox, Edge, recent Safari	All browsers, all devices
File size (same quality)	Slightly smaller	Baseline
Transparency support	Yes (VP9 alpha)	No
Social media support	Limited (prefer MP4)	Universal
HTML5 embed	Excellent	Excellent

The short version: MP4 for maximum compatibility (social media, email, unknown devices). WebM for web projects where you control the player and want open-source formats.

Converting GIF to WebM: Step by Step

Go to wildandfreetools.com/video-tools/gif-to-video/. Upload your GIF using the drop zone. Before clicking Convert, select WebM as the output format instead of MP4. Click Convert and download the WebM file.

The resulting file uses VP8 or VP9 encoding depending on the tool settings. Both are compatible with all modern browsers. The file downloads with a .webm extension and can be embedded in HTML using the standard video tag.

<video autoplay loop muted playsinline>
  <source src="your-animation.webm" type="video/webm">
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Embedding a GIF-Converted WebM on a Website

WebM plays natively in all modern browsers without plugins. The recommended HTML5 video embed for a looping, muted, autoplay animation (replacing a GIF) is:

The autoplay and loop attributes replicate GIF behavior. The muted attribute is required for autoplay to work in most browsers. The playsinline attribute prevents iOS from opening the video in full-screen mode.

For best cross-browser support, provide both WebM and MP4 sources and let the browser choose:

<video autoplay loop muted playsinline>
  <source src="animation.webm" type="video/webm">
  <source src="animation.mp4" type="video/mp4">
</video>

How Much Smaller Is WebM Than GIF?

WebM follows similar file size patterns to MP4 for GIF conversion — typically 80–90% smaller than the source GIF. A 10MB GIF usually becomes a 500KB–1MB WebM file. The exact ratio depends on the GIF content: complex animations with lots of motion save more than simple animations with static backgrounds.

Compared to MP4 at the same quality level, WebM is generally 10–20% smaller. For a file that is already 500KB as an MP4, the WebM equivalent might be 400–450KB. This difference matters at scale (thousands of page views) but is negligible for a single file sent once.

See also: GIF vs MP4 file size comparison and quality settings explained.

Frequently Asked Questions

Does Safari support WebM?

Recent versions of Safari (macOS Monterey and later, iOS 16+) added WebM/VP9 support. Older Safari versions do not support WebM. If your audience includes older Safari users, serve both WebM and MP4 sources as shown in the embed example above.

Can I upload a WebM to social media?

Most social platforms prefer or require MP4. Instagram, TikTok, and Twitter/X do not accept WebM uploads. YouTube accepts WebM. For social media use, choose MP4 instead.

Is WebM better than MP4 for my website?

For web-only use where you serve the video directly in an HTML5 player, WebM is a solid choice — royalty-free, well-compressed, and fully supported in modern browsers. If any of your users might be on older devices or browsers, include MP4 as a fallback.

Does GIF to WebM preserve transparent backgrounds?

WebM with VP9 encoding supports alpha channel transparency. If the GIF has a transparent background, the WebM output may preserve it. Test in Chrome for best alpha channel support. See our transparency guide for full details.