🧪 Regex Tester
Test regular expressions in real time. See matches highlighted, capture groups, and match indices. Supports JavaScript regex flags — 100% client-side.
📖 How to Use the Regex Tester – Step by Step
- Enter a regex pattern – Write your regular expression (without slashes). Example:
\d+to match digits. - Select flags – Toggle
g(global),i(case‑insensitive),m(multiline),s(dotall). - Provide test text – Paste or type the text you want to search.
- See real‑time highlighting – Matches are highlighted in yellow (groups in green) automatically.
- Review match details – Below the text, you'll see each match's full text, index, and any capture groups.
📢 Share this regex tester with developers – it's free and private!
🔒 100% client‑side • Your regex and text never leave your browser • Real‑time highlighting • Zero tracking