Hidden Character Finder
Find letters from another alphabet inside your text: Latin inside Cyrillic, Cyrillic inside Latin, Greek symbols, and invisible marks. Pick the alphabet and the tool highlights every match.
How to use
Paste your text
Copy text from a document, email, or chat into the input field.
Pick the alphabet
Select the alphabet whose characters you want to highlight. For example, pick Latin to find English letters inside Russian text.
Review the highlights
Every match is highlighted in the chosen color right in the text.
Change the color
If the highlight is hard to see, pick a different color in the 'Highlight color' field above.
Features
Alphabet-based search
Separate toggles for Cyrillic, Latin, Greek, and invisible characters — search one alphabet or several at once.
Configurable highlight color
Any background color for the matched characters. Yellow by default, like a classic highlighter.
Invisible characters
A dedicated mode for zero-width space, BOM, soft hyphen, and other non-printable marks.
In-text highlighting
Matches are highlighted right in the original text — you see exactly where the suspicious characters are.
Match counter
Shows how many characters matched the selected alphabet.
Nothing leaves your browser
All analysis runs locally. Text is never uploaded or stored.
When it helps
- Find Latin letters inside Cyrillic text — a common issue after copying from PDF or Word.
- Check a password or username for characters from a different alphabet.
- Find Cyrillic characters inside Latin code or config — they break builds and parsing.
- Detect invisible characters after copying from a web page.
- Check a domain name for visual substitutions (homoglyphs).