About this tool
The Unicode Character Inspector splits a string into its individual code points and shows everything about each one. It iterates by code point (not by 16-bit unit), so astral characters and emoji made of surrogate pairs are handled correctly. For every code point you get the glyph, its U+XXXX hex value, the decimal value, a name for well-known characters, the general category, and the Unicode block it belongs to.
All analysis is derived algorithmically in your browser and nothing is uploaded. The encodings are computed from first principles: the UTF-8 bytes follow the 1-to-4-byte encoding rules, the UTF-16 code units are a single unit in the BMP or a high/low surrogate pair (D800–DBFF / DC00–DFFF) above it, the HTML numeric entity is &#nnnn;, the JavaScript escape is \uXXXX for the BMP or \u{XXXXX} for astral code points, and the percent-encoding is the UTF-8 bytes written as %XX. The general category (Lu, Ll, Nd, Mn, Zs, Cc, and so on) is detected with Unicode property-escape regular expressions.
The inspector flags characters that often cause bugs or are used to hide text: zero-width characters (200B–200D, 2060, FEFF), bidirectional controls (200E, 200F, 202A–202E, 2066–2069), combining marks, and C0/C1 control characters — these are shown as a dot so invisible content becomes visible. A summary line reports the code-point count, the UTF-16 length (String.length), and the total UTF-8 byte count. This tool is for inspection; to normalize between NFC and NFD use the Unicode normalizer. Copy the full breakdown as tab-separated text.