FREE TOOL — NO SIGNUP
Test your regex, then read the test report on what it actually does.
Paste a pattern and a block of text. See every match highlighted live, and get a line-by-line, plain-English breakdown of each piece of the expression — anchors, groups, quantifiers, character classes, all of it.
pattern.spec
/ /
g — global i — ignore case m — multiline s — dotAll u — unicode
Waiting for a pattern…
Quick-load a pattern
Test string
test.run — live output
Matches will highlight here as you type.
explain.log — token by token
Reference — the syntax this tool understands
Built for developers debugging regex on the fly. No data is transmitted — parsing and matching run locally in your browser.