Identify a file's true format by reading its magic bytes — not its extension. 100% browser-based, no upload required.
Try it Free →Reads the raw binary header of each file to identify its true format — PNG, JPEG, PDF, ZIP, MP4, and 100+ more types.
Compares detected format against the declared file extension and flags mismatches in red — catch malicious or renamed files instantly.
Click any result to expand a HEX dump showing the first 256 bytes, with magic bytes highlighted in yellow for easy identification.
Upload multiple files at once via drag-and-drop, click, or Ctrl+V paste. All files are processed in parallel and shown in order.
Files are processed entirely in your browser using the file-type library. No data ever leaves your device.
Clean, responsive interface with full dark mode support, optimized for both desktop and mobile use.
Drag and drop one or more files onto the upload area, click to browse, or paste a file from your clipboard with Ctrl+V.
Each file shows a result card with its declared extension, detected MIME type, and a green (match) or red (mismatch) indicator.
Click any card to expand the HEX dump view, showing the first 256 bytes with magic signature bytes highlighted.