Regex Tester

Test regular expressions live against any text. Highlights all matches, shows capture groups, and explains common patterns.

Regular Expression

/ /

Test String

Highlighted Matches

Matches will be highlighted here…

Common Regex Patterns

Pattern	Matches
`\d+`	One or more digits
`\w+`	Word characters (letters, digits, underscore)
`[a-zA-Z]+`	Letters only
`^\S+@\S+\.\S+$`	Basic email address
`https?://\S+`	URLs starting with http or https
`\b\w4\b`	Exactly 4-letter words

 Regex Flags
  g — global: find all matches, not just the first
  i — case-insensitive: treat uppercase and lowercase as equal
  m — multiline: ^ and $ match start/end
        of each line
  s — dotAll: . also matches newline characters