file-type-checker
Detect and validate file types by their signatures (✨magic numbers✨)
file-type
Detect the file type of a file, stream, or data
pretty-bytes
Convert bytes to a human readable string: 1337 → 1.34 kB
filetypes
Filetypes is a library that helps you guess the file and mine types of files using magic numbers
papaparse
Fast and powerful CSV parser for the browser that supports web workers and streaming large files. Converts CSV to JSON and JSON to CSV.