Regex Tester

Test and validate regular expressions with real-time matching

Pentest Tool · v2.1 (Secure)

Actions

Match, Replace, Split, Grep

Flavors

PCRE, JS, Python, PHP

100KB

Max Input

Test string limit

⚡

Real-time

Instant results

Regex Tester Pro

Test regular expressions with multiple flavors and actions

Regular Expression

Max 9.77 KB

Regex Flavor

Case Insensitive (i) Multi-line (m) Dot matches newline (s) Unicode (u)

Test String

Max 97.66 KB

Match Replace Split Grep

Supports PCRE, JavaScript, and Python regular expressions. Maximum test string size: 97.66 KB.