MIME / File Type Sniffer
Identify a file's real type by its magic bytes, not its extension.
Pick any file — common signatures include PNG, JPEG, GIF, PDF, ZIP, MP3, WAV, MP4, GZIP, 7z, RAR, ELF, PE, and many more.
About this tool
Upload any file to identify its true type by reading the magic bytes (file signature) at the start of the file. Catches mismatched extensions and detects 30+ formats including images, archives, audio, video, fonts and binaries.