Online Regex Tester

Test regular expressions against text using Python re, PCRE, or ECMAScript (JavaScript) engines — with live match highlighting and named-group capture.

Regex Engine

Common Patterns Picks fill the pattern. Sample text swaps too — you'll be asked before overwriting your own edits.

Paste sample text below, then select the part(s) you want to match and click “Add selection”. Repeat for as many examples as you want, then click Generate.

Loose (generalise)

Strict (exact form)

— no regex yet —

Click building blocks to add them in order. Edit literal text inline.

(no blocks yet — click the buttons above)

— no regex yet —

Type what you're looking for in plain English. We'll suggest matching patterns.

Regex Flags

Ignore Case i

Multiline m

Dot Matches Newline s

Verbose x

Unicode u

Global g

Regex Pattern

Substitution / Replace mode

Test Text