Developer tools

Regex Tester & Cheat Sheet

Try regular expressions against sample text and preview replacements while keeping everything private in your browser.

Test regular expressions locally

Build and test JavaScript regular expressions in your browser. Nothing you enter is sent, stored, or shared.

Regular expression

Test text

Flags: g

Run a test to view matches here.

Replacement

Preview a replacement to view the output here.

Any character

Digit

Word

Whitespace

One or more

Zero or more

Optional

Start/end

^ $

Capture group

(abc)

Named group

(?<name>abc)