Regex Tester
Test JavaScript regular expressions against your input string. Supports flags: g, i, m, s, u, y.
Matches
No matches yet.
Test Regular Expressions Against Real Text
Build and debug regular expressions with immediate feedback. Highlighted matches make it easier to refine patterns for validation, parsing, or simple text transforms.
Where It Helps
- Validation: Emails, IDs, and custom formats (with care for edge cases).
- Extraction: Capture groups for pulling fields from logs or text.
- Refactoring: Find/replace patterns across snippets.
Tips
- Prefer explicit patterns over overly broad wildcards.
- Test with multiple samples, including edge cases and empty inputs.