is-animated

DEPRECATION NOTICE

This GitHub repository no longer contains the active source code for the is-animated NPM package.

As of September 1, 2026, the package is maintained in the new repository: FRSOURCE/is-animated.

Please submit all new pull requests, issues, discussions and other project-related information to the new repository.

For more information about the transition, please see this issue: #26

Thank you for your understanding!

is-animated is a simple library for detecting animated images, it supports not only GIFs, but also APNG and WebP images.

Install

npm install is-animated

Example

const fs = require('fs')
const isAnimated = require('is-animated')

const filename = process.argv[2]

fs.readFile(filename, (err, buffer) => {
  const answer = isAnimated(buffer) ? 'Yes' : 'No'
  console.log(`Is "${filename}" animated? ${answer}.`)
})

License

MIT