What is Regex Tester?

Test and debug regular expressions against live sample text. Write a pattern, add test strings, and watch matches highlight in real time — ideal for building validation rules and data-extraction patterns. This free regex tester tool runs entirely in your browser — no sign-up, no uploads, and no data leaves your device.

Why use the Regex Tester tool?

• Optimized for "regex test"
• Live match highlighting as you type your pattern
• Supports flags, global matches, and capture groups
• Flatten complex regex debugging into one screen