node-poppler
Asynchronous node.js wrapper for the Poppler PDF rendering library
file-type-checker
Detect and validate file types by their signatures (✨magic numbers✨)
image-in-browser
Package for encoding / decoding images, transforming images, applying filters, drawing primitives on images on the client side (no need for server Node.js)
flipnote.js
A JavaScript library for parsing, converting, and in-browser playback of the proprietary animation formats used by Nintendo's Flipnote Studio and Flipnote Studio 3D apps.
leather
A pure JS library for extracting image/video attributes such as width, height, size, and mime type