Free Unlimited File Signature Checker | No Sign-Up

The Ultimate Free File Type & Signature Detector

Have you ever come across a “file.bin” or a document with no extension and wondered what it actually is? Our Free File Signature Detector is a professional-grade binary inspection tool that works directly in your browser. Unlike other online converters, we don’t require an email address, and there are absolutely no usage limits.

Why Use Our Binary Inspector?

Sometimes, file extensions lie. A file named image.jpg might actually be a malicious script or a renamed zip archive. Our tool looks at the “Magic Bytes”—the internal hexadecimal signature—to tell you the truth about your data.

• 100% Free & Unlimited: Process one file or one thousand; we never charge a fee.
• Privacy First: Your files are analyzed locally in your browser. They are never uploaded to a server, keeping your sensitive data private.
• No Sign-Up Required: Start detecting immediately. We don’t want your data; we just want to help you identify yours.
• Instant Image Analysis: Automatically detect dimensions and aspect ratios for over 100 image formats.

Commonly Detected Formats

Our database supports a wide range of categories, including:

• Images: PNG, JPEG, GIF, HEIC, WEBP, and TIFF.
• Documents: PDF, DOCX, XLSX, RTF, and XML.
• Archives: ZIP, 7Z, RAR, and GZIP.
• Multimedia: MP4, MOV, MKV, MP3, and WAV.
• System Files: EXE, DLL, ELF, and SQLite databases.

How to Identify a File

1. Drag and drop your mystery file into the inspection box.
2. View the Results: The tool will instantly display the true extension and Mime-type.
3. Verify: Check if the internal data matches the file’s name to catch “mismatched” extensions.