Regex Tester

Test regular expressions with live match highlighting and group capture

Encoding & Text

About this tool

Regex Tester lets you write a pattern and test it against input text with real-time match highlighting. Supports flags (g, i, m, s) and shows capture group values.

Related Tools

Text Case Converter

Transform text to UPPER, lower, Title, camelCase, snake_case and more

Text Diff

Compare two text blocks and highlight added and removed words

Word Counter

Count words, characters, lines, sentences, paragraphs and reading time

📘 Learn More

100% client-side • No data leaves your browser

Guides:JSON Viewer·Base64 Guide·Regex Guide·JWT Decoded·Password Security