Regex Tester

Test regular expressions in real-time · Match highlighting · Replace & Split · Code generation for 10+ languages

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Flags
Test String
Enter a regex pattern to see matches
Pattern Library

Features

  • Real-time match highlighting as you type
  • Global, case-insensitive, multiline, dotAll, Unicode flags
  • Named capture groups support
  • Inline replace with back-references ($1, $&)
  • String split visualization with parts list
  • Code generation for 10+ languages
  • 50+ searchable built-in regex patterns
  • Regex quick reference cheat sheet
  • Performance timing in milliseconds
  • 100% client-side — your data never leaves the browser

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Why use Tool Matrix Regex Tester?

Regular expressions are powerful but tricky to get right. Our tester gives you instant visual feedback — matches highlight as you type, group details appear immediately, and you can instantly test replace and split operations. Then export working code for your language in one click.

  • Real-time Highlighting — See exactly which parts of your string match the pattern
  • Group Capture Details — Every match shows its captured groups with indices
  • 10+ Language Code Gen — Export to JS, Python, Go, Java, C#, PHP, Swift, Kotlin, Rust, Ruby
  • 50+ Built-in Patterns — Email, URL, IP address, date, color, phone, UUID and more
  • Quick Reference — Regex cheat sheet always within reach
  • Privacy First — All regex testing runs in your browser; no data is ever sent to servers