Regex Tester & Explainer

Test regular expressions live, see every match and capture group, and get a plain-English breakdown of the pattern.

Pattern

//g

Test string

Matches

Call us at 555-1234 or 555-9876 for support.

Replace with

Call us at [phone: 555-1234] or [phone: 555-9876] for support.

Pattern breakdown

(\d{3})capturing group: digit (0-9) (exactly 3 times)

-literal "-"

(\d{4})capturing group: digit (0-9) (exactly 4 times)