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Test regular expressions online with real-time match highlighting and count. Ideal for text processing, form validation and log parsing.
How to use
- Enter a regex (e.g. \d{4}-\d{2}-\d{2})
- Set flags (g global, i ignore case)
- Enter test text and click "Test"
Example
Regex \d{4}-\d{2}-\d{2} matches dates like "2024-01-15".
FAQ
What are common regex flags?
g global, i ignore case, m multiline, s dot matches newline.
Are there performance concerns?
Watch out for catastrophic backtracking; avoid nested quantifiers like (a+)+.