Drop File to Verify True Extension
Checks raw binary magic bytes to detect disguised executables, malware, and fake extensions
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How to Use File Extension Checker
- Drop any file into the scanner.
- Our engine reads the first raw bytes (magic numbers) of the file.
- Compare the declared extension against the true binary signature.
- Inspect the security risk score and associated software.
Key Features & Advantages
- Detects disguised executable and script files (e.g. .exe masquerading as .jpg/.pdf)
- Magic byte signature inspector (Hex & ASCII header view)
- Security risk level assessment (Safe / Warning / Dangerous)
- Database of 300+ binary file signatures
Frequently Asked Questions
Malicious actors often rename harmful scripts or executables with image or document extensions (.jpg.exe or disguised headers) to trick users into opening them.