Regex Tester
Test and debug regular expressions with real-time highlighting. Free, fast, and runs 100% in your browser.
hello@example.comsupport@company.orgadmin@test.co\\d+ — Digits\\w+ — Word chars[a-zA-Z]+ — Letters\\b\\w+@\\w+\\.\\w+\\b — Email^https?:// — URL start\\d{3}-\d{3}-\d{4} — PhoneAbout Regex Tester
The ZamDev Regex Tester is a real-time regular expression debugger that highlights matches as you type. Test patterns against sample text, toggle flags like global, case-insensitive, and multiline, and instantly see which parts of your text match. Whether you are writing validation patterns, parsing log files, or extracting data with capture groups, this tool provides instant visual feedback to get your regex right.
How It Works
- 1Enter your regular expression pattern in the pattern field.
- 2Type or paste test text in the input area below.
- 3Matches are highlighted in real time as you type.
- 4Toggle regex flags (g, i, m) to change matching behavior.
- 5View match details including capture groups and match positions.
Key Features
Lightning Fast
Processes instantly with zero server delays
100% Private
Your data never leaves your device
No Sign-up Required
Use this tool instantly — completely free
Works Everywhere
Compatible with all modern browsers and devices