Regex Tester & Debugger

Test regular expressions against target strings. Inspect capture groups, configure match flags, and debug match arrays in real-time.

Regular Expression Pattern

Test String

Visual Match Highlighting0 Matches Found

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About Regular Expressions (Regex)

Regular Expressions (Regex or Regexp) are character patterns defining search templates. They are vital for validation inputs, search engines, parser utilities, lexical analysis, and general text processing filters.

Understanding the flags:

g (Global): Continues scanning matching templates after the first occurrences. If disabled, parses only the first match index.
i (Case Insensitive): Bypasses capital/lowercase distinctions (e.g. A matches a).
m (Multiline): Treats starting and ending selectors (^ and $) as matching separate lines instead of the absolute beginning/end of the full string.