What regex features are supported?

The tester supports all standard JavaScript regex features including capture groups, named groups, lookaheads, and flags (g, i, m, s, u).

Can I test regex replacements?

Yes, there is a substitution preview feature that lets you test regex replacements with custom replacement strings in real-time.

Yes, a built-in cheat sheet and common patterns library provides quick reference for regex syntax and ready-to-use patterns.

Test and debug regular expressions in real time with match highlighting, capture group visualization, and a quick-reference cheat sheet.

Regular Expression

/ /

Global (g) Case-insensitive (i) Multiline (m) Dotall (s)

Test String

Replacement String