Regex Playground
Test and debug regular expressions online. Interactive regex tester with syntax highlighting, match visualization, and capture groups.
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How to Use
- 1Enter your regular expression pattern
- 2Select flags (g=global, i=ignore case, m=multiline, etc.)
- 3Paste or type your test text
- 4View highlighted matches and capture groups
- 5Refine your pattern based on the results
Example
Input:
Pattern: \b[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,}\b
Flags: gi
Text: Contact us at support@example.comOutput:
Match found: support@example.com
Test, debug, and refine regular expressions with our interactive playground. See matches highlighted in real-time, inspect capture groups, and understand how your patterns work.
Perfect for developers learning regex, debugging complex patterns, or validating data extraction logic before implementing it in code.
Includes common regex snippets, a quick reference guide, and safety checks to help prevent catastrophic backtracking that could freeze your browser.
Frequently Asked Questions
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