🧩Regex Tester
Test and validate your regular expressions instantly. Enter a pattern, add flags, and test against your string to see live matches.
✓ Regex validation✓ Live match highlighting✓ Copy results✓ Mobile optimized
Frequently Asked Questions
🤔 What is a regex?
A regular expression (regex) is a sequence of characters that define a search pattern, often used for string matching and validation.
🔍 How does this regex tester work?
Simply enter your regex pattern and flags, then test it against your input string. Matches will be highlighted instantly.
⚠️ What happens if I enter an invalid regex?
If your regex pattern is invalid, the tool will show an error message so you can quickly fix it.
🌍 Can I test regex with different flags?
Yes, you can add flags like g (global), i (case-insensitive), and m (multiline) to adjust how the regex behaves.