Text & Writing
Regex Tester
Test regular expressions with live match highlighting.
Highlighted matches
Matches will be highlighted here.
About this tool
Test and debug regular expressions with live match highlighting, a capture-group table and all flags. A built-in cheatsheet and input caps keep it fast.
- 1Enter a pattern and flags, then paste the text to match against.
- 2Matches highlight live and capture groups appear in a table.
- 3A cheatsheet covers the syntax you reach for most.
- 4Input is capped and matching is debounced to blunt catastrophic-backtracking regexes.
Private by design
Everything runs locally in your browser. Your text, files and images are never uploaded to a server — the entire tool works offline once the page has loaded.
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