Binary Header Inspection & Extension Spoofing Analyzer

Magic Byte Binary Signature Detector

Upload any file to analyze its true hexadecimal header magic bytes. Uncover hidden file types and detect extension spoofing before execution.

Drop File to Analyze Binary Magic Bytes

Supports any binary file, document, image, audio, video, or installer or browse local file

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100% In-Browser Memory Reading • Private & Secure

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Magic bytes are unique fixed hexadecimal byte sequences embedded at the very beginning (offset 0) of binary file headers. For instance, all PDF documents begin with hexadecimal bytes 25 50 44 46 (%PDF), and all Windows executable programs start with 4D 5A (MZ).