file-type
Detect the file type of a file, stream, or data
file-type-checker
Detect and validate file types by their signatures (✨magic numbers✨)
@sgtpooki/file-type
An *Ackchyually* browser compatible file-type hacky replacement of the `file-type` package. Forked from https://github.com/sindresorhus/file-type
leather
A pure JS library for extracting image/video attributes such as width, height, size, and mime type