Regex Tester
Live regex testing with match highlighting, capture groups, flag toggles, presets, substitution, cheat sheet, history, and code generator.
/ /
Presets:
0
Matches
0
Groups
0ms
Time
—
Flags
◆ What it does
Advanced regex tester with live matching, capture group extraction, substitution, code generation, and a comprehensive cheat sheet.
▸ How to use
- Type a regex pattern in the pattern field
- Enter test text to see matches highlighted in real-time
- Toggle flags (g, i, m, s, u) as needed
- Use substitution tab to find & replace
▸ Why use this
- Test regex patterns instantly without running code
- Visualize matches and capture groups
- Generate code snippets for JS, Python, PHP, Java
- Learn regex with the built-in cheat sheet
FAQ
What is Regex Tester?
Live regex testing with match highlighting, capture groups, flag toggles, presets, substitution, cheat sheet, history, and code generator.
How do I use Regex Tester?
Type a regex pattern in the pattern field Enter test text to see matches highlighted in real-time Toggle flags (g, i, m, s, u) as needed
Why use Regex Tester?
Test regex patterns instantly without running code Visualize matches and capture groups Generate code snippets for JS, Python, PHP, Java