Drop any file here to inspect it
Works with images, documents, archives, executables and more
Maximum file size: 200 MB · All analysis runs locally in your browser
Drop a file to reveal its real format using binary signatures — not just its extension name.
A file type detector identifies the real file format by reading the internal binary "magic number" at the start of the file — not its extension. Even if a .exe is renamed to .jpg, this tool will reveal its true identity.
All analysis runs entirely inside your browser using the Web Crypto API. Your files are never uploaded to any server and never leave your device.