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Detect the true file type (MIME type) and view file name and size details. Perfect for both developers and everyday users.
Click or drag file here
Max 100 MB • Max 1 files
Detection Results
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JSON to TypeScript Zod Schema Converter
Automatically convert JSON data structures into TypeScript Zod validation code to improve frontend development efficiency and type safety.
JSON to PropTypes Converter
Automatically convert JSON data structures into React PropTypes validation code to boost your front-end development efficiency.
Not sure about a file's true format? Our File Type Checker analyzes file content and characteristics to accurately identify its MIME type (such as application/pdf or image/png). It also outputs the file name and size, helping you quickly verify the file's essential properties.
How do I know if the detected file type is accurate?
The tool uses dual verification through file header signatures (e.g., the first bytes of a PNG file are 89 50 4E 47) and content characteristics, making it much more reliable than checking the file extension.
Can I check multiple files at once?
The current version only supports single-file detection. For batch processing, you will need to check them one by one.
The tool processes only one file at a time (≤1GB). Encrypted or corrupted files may lead to inaccurate detection. The system does not store uploaded files, but we still recommend avoiding the transfer of sensitive data.
It is always recommended to check the binary file header first: for example, a JPEG file should start with FF D8, and a ZIP file header is 50 4B 03 04. This tool is particularly effective for security checks on disguised extensions, such as identifying the true type of an .exe file that has been renamed to .txt.
