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ToolsRegex Cheatsheet
development
Regex Cheatsheet
Syntax reference
How to use it
1
Examples to try
3
Frequently asked questions
4
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3
regex cheatsheetregular expression referenceregex syntax guideregex patternsregex quick reference
How to use it
9A quick reference guide for common regular expression syntax, including character classes, quantifiers, and anchors.
How to use it
9A quick reference guide for common regular expression syntax, including character classes, quantifiers, and anchors.
What teams use it for
- Email and phone number validation in forms
- Log file parsing and data extraction
- Text data cleaning for analysis
- Log searching and filtering for debugging
- Find and replace patterns in documents
- Threat intelligence pattern detection
- API input validation and sanitization
- URL and domain name validation
Examples to try
6Example 1: Start with a small input to validate the format.
Examples to try
6Example 1: Start with a small input to validate the format.
Examples to try
- Example 1: Start with a small input to validate the format.
- Example 2: Try a real-world payload to confirm the output.
- Example 3: Compare the result against your expected structure.
Common pitfalls
- Mixing formats or encodings in a single input.
- Copying output without reviewing edge cases.
- Skipping validation before sharing the result.
Frequently asked questions
4Is this for JS?
Frequently asked questions
4Is this for JS?
Is this for JS?
Yes, optimized for JavaScript RegExp flavor.
Does it cover flags and groups?
Yes, it includes common flags, groups, and character classes.
Does it cover lookarounds?
Includes common lookahead/behind patterns.
Is it JavaScript-specific?
Examples are tuned for JS regex.
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