Regex Tester

Live regex testing with match highlighting, capture groups, flag toggles, presets, substitution, cheat sheet, history, and code generator.

Ctrl/⌘ + , to toggle options

Saved

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Presets:

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Matches

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Groups

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Time

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Flags

Test String

Match Results

📜 Recent Patterns

◆ 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

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