UltKit

GIF to WebM Converter

A GIF stores every frame as a separate indexed image, which makes loops heavy and grainy. WebM stores the same motion as modern video, so the file shrinks dramatically and colors stop banding.

Video Converter

or drop MP4, MOV, MKV … files here ·

Max 95 MB per file· Up to 20 files· Deleted after 30 minutes

Output

Files are processed on our servers and deleted after 30 minutes.

How to use this tool

  1. 1

    Add the GIFs

    Drop animated GIFs on the upload area, up to 20 files of 95 MB each.

  2. 2

    Set size and length if needed

    The page starts at Quality (CRF) 30 with no audio. For a sticker, pick a lower Resolution, trim with Start at and End at, or tick Limit file size.

  3. 3

    Convert and download

    Press Convert to WebM and use the file in a chat or on your page.

Animated GIF

4.8 MB

Typical 5-second loop · 480 px · 256 colors

about 90% smaller

WebM (VP9)

0.4 MB

Same loop · 480 px · CRF 30

Why convert GIF to WebM

WebM was announced by Google in 2010 as an open, royalty-free video format, built on a subset of the Matroska container. Its VP9 codec compresses motion by predicting each frame from the previous ones, something GIF cannot do, and it keeps full color instead of a 256-entry palette. The result is a smaller file with smoother gradients.

That matters wherever size is capped. Free Discord accounts can upload 10 MB per file, Telegram video stickers allow 256 KB, and every extra megabyte on a web page slows the first paint. A loop that is too heavy as a GIF often fits comfortably as WebM.

GIF

Graphics Interchange Format

GIF was introduced by CompuServe in 1987 and is still the most widely supported format for short, looping animations. It is lossless but limited to a palette of 256 colours per frame, so photos and gradients show banding and dithering. It supports only on/off (1-bit) transparency, which leaves jagged edges on curved shapes. Animated GIFs are often far larger than the same clip as MP4 or WebP. Every browser, chat app and social platform plays GIFs.

Compression
Lossless
Transparency
Yes
Animation
Yes
Introduced
1987 · CompuServe
GIF converter

WEBM

WebM video

WebM is an open, royalty-free video format released by Google in 2010 for the web. It is based on Matroska and holds VP8, VP9 or AV1 video with Vorbis or Opus audio, and VP9 WebM can include an alpha channel for transparent video. Browsers play it natively, and browser screen recorders often produce it. Apple devices, video editors and social platforms have historically had weaker support than for MP4.

Compression
Lossy
Transparency
Yes
Animation
–
Introduced
2010 · Google
WEBM converter

GIF goes to WebM to make a loop light enough for a chat upload, a Telegram sticker or a web page, swapping the 256-color palette for real video compression.

Using a converted WebM in Discord, Telegram and on a site

Drag the WebM into a channel; it plays inline and repeats when short. Under 10 MB it uploads on a free account.

  • Use Limit file size at 10 MB for long loops
HTML for a GIF-style WebM loop
<video autoplay loop muted playsinline width="480"><source src="loop.webm" type="video/webm"><source src="loop.mp4" type="video/mp4"></video>

When to keep the GIF instead

Email is the main exception: most mail apps show an animated GIF inline, while very few play a video inside the message body. Some forum signatures, wikis and older content systems also accept images only. Keep the GIF there, and use compress GIF for Discord if the only problem was the size.

Everything else that plays video, from slides to landing pages, gets a better loop from WebM or MP4. For other formats and settings, see the video converter.

GIF to WebM questions

How much smaller is WebM than the original GIF?

Typically 80–95% smaller for the same loop at the same size. GIF compresses each frame on its own with a 1987 method, while VP9 video stores only what changes between frames. Loops with a static background shrink the most.

Does the WebM loop like the GIF did?

A video file has no loop flag of its own; the player decides. Discord and Telegram repeat short WebM clips automatically, and on a web page the loop attribute on the video tag does the same. The snippet above includes it.

What are Telegram's rules for video stickers?

Telegram video stickers must be WebM with the VP9 codec, 512 px on the longer side, no longer than 3 seconds, no audio and at most 256 KB. Set Resolution low enough to reach 512 px, trim to 3 seconds and tick Limit file size at 256 KB.

Why does my GIF's transparent background turn black in the WebM?

GIF transparency is a single palette entry, and this conversion writes an opaque video. Transparent pixels get a solid fill. For a transparent sticker on Discord or LINE, GIF to APNG keeps the cut-out.

Will the WebM play on an iPhone?

Recent iOS versions play VP9 WebM in Safari, but older iPhones and some apps do not. For a page, list an MP4 source after the WebM one so every device finds a file it can play; GIF to MP4 makes that second file.