File Signature Detective
Identify file types from hex signatures (magic bytes). Supports 40+ formats including images, archives, executables, documents, and audio files. Essential for CTF forensics.
File Signature Analysis for CTF Forensics
Every file format begins with a unique byte sequence called a "magic number" or file signature. In CTF forensics challenges, files are often given without extensions or with modified headers. By examining the hex signature, you can identify the true file type — even if the extension has been changed. This tool supports over 40 common file signatures including images (JPEG, PNG, GIF), archives (ZIP, RAR, 7z), executables (PE, ELF, Mach-O), documents (PDF, OLE2), and more.