Paste your text, and the tool scans it for special and non-ASCII characters and lists each one's named, decimal, and hexadecimal HTML entity codes.
The finder lists reserved HTML characters (& < > " '), and any non-ASCII characters such as ©, €, — or emoji, giving each one its entity codes. Plain printable ASCII letters and digits are skipped.
For every character it shows the named entity when one exists (like ©), the decimal numeric entity (©) and the hexadecimal entity (©). Numeric entities work even when no name exists.
Encoding reserved characters prevents them from breaking your markup or being misread as tags, and numeric entities let unusual symbols display reliably regardless of file encoding.