File Investigator

Deep forensic analysis.

Drop file to investigate

Analyzes magic numbers, entropy, hidden strings, and metadata entirely in your browser.

How File Investigation Works

Magic Numbers

Files aren't identified by their extension (like .jpg), but by their "Magic Numbers"—specific bytes at the start of the file. This tool reads those bytes directly to tell you what a file really is, even if the extension is fake.

Entropy Analysis

Entropy measures the randomness of data. High entropy (close to 8.0) suggests the file is compressed or encrypted. Low entropy suggests plain text or simple data structures.