About WhatChar

WhatChar is a small browser-based tool for checking confusing Unicode characters. It helps identify characters that look similar, such as lowercase l, uppercase I, digit 1, Latin O, digit 0, Greek and Cyrillic lookalikes, Hangul lookalikes, fullwidth forms, punctuation variants, and invisible spaces.

The tool is designed for people who need to inspect suspicious text, usernames, domains, code snippets, social media posts, or copied text where visually similar characters may be confusing.

All analysis runs locally in your browser. The text you paste is not sent to a server.

Part of Kakerio

WhatChar is a tool by Kakerio, a family of small browser tools for text and CSV files. It keeps its own address, isitiorl.com, and works exactly as before.

If the text you are checking also has other problems, these Kakerio tools may help: Japanese Text Normalizer for full-width, half-width and kana forms, Mojibake Fixer for garbled text, and CSV Doctor for CSV files. Like WhatChar, they process your text in your browser.