Regex Playground
Build, test, and debug regular expressions with real-time match highlighting
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What is Regex Playground?
Free online regex playground to goes beyond basic testing.
Build and debug regular expressions with real-time match highlighting, capture group inspection, and find-and-replace mode. Browse a library of common patterns (email, URL, phone, IP address, dates, hex colors, HTML tags, and slugs) to jumpstart your work. Toggle regex flags interactively, see alternating match colors for clarity, and share your regex via URL. All processing runs locally in your browser - your data never leaves your device. No signup required.
How to Use Regex Playground
- 1Enter a regex pattern in the pattern field, or choose one from the Common Patterns library
- 2Select the flags you need (global, case-insensitive, multiline, dotAll, unicode)
- 3Type or paste your test string to see matches highlighted in real time
- 4Inspect capture groups below the highlighted output for detailed group information
- 5Switch to Find & Replace mode to test substitution patterns using $1, $2, or $&
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