Regex Tester
Test and debug regular expressions online with live match highlighting. See match counts and positions instantly — free, no console needed.
Tip: press [ / ] to jump between matches
Related tools
Case Converter
Convert text between camelCase, snake_case, PascalCase, kebab-case, and more, instantly online. Free tool for renaming variables and API fields.
Text Compare
Compare two blocks of text and highlight every change, line by line, instantly online. Free text compare tool for code, configs, and API responses.
PDF Compare
Compare two PDF files online and highlight visual and text differences. Free multi-page PDF compare — runs in your browser, no upload to a server.
Word Counter
Count words, characters, sentences, and estimate reading time instantly online. Free word counter that updates live as you type or paste text.
About Regex Tester
Test and debug regular expressions in real time — no console needed. • See all matches highlighted as you type the pattern • Jump Prev/Next between matches in long test strings ([ / ] keys) • Toggle flags: global (g), case insensitive (i), multiline (m) • Capture groups listed when your pattern uses them