neilharvey FileSignatures by: neilharvey .NET 8.0 This package targets .NET 8.0. The package is compatible with this framework or higher. .NET Standard 2.0 This package targets .NET Standard 2.0. The package is compatible with this framework or higher. 3,331,305 total downloads last updated 8/1/2025 Latest version: 6.0.0 File Format Mime Type Media Type Header Signature Detection A small library for detecting the type of a file based on header signature (also known as magic number) rather than file extension.