Write regular expressions in Melody, a language designed to make regex patterns more readable and maintainable.
Regex Syntax Cheatsheet
Use the MDN regular expression cheat sheet to look up JavaScript RegExp syntax and related capabilities.
About Regex Syntax Cheatsheet
The Regex Syntax Cheatsheet is a reference page on MDN Web Docs for JavaScript regular expressions. It aggregates content from the articles in the RegExp guide into a single cheat sheet format. The page covers character classes and syntax used to match different kinds of characters in text.
You can use it to look up definitions and examples for patterns such as character ranges, negated classes, wildcards, digit and word escapes, whitespace escapes, and Unicode escapes. Each entry explains what the syntax matches and shows how it applies to sample strings. Headings link to the full guide articles for more information on a specific topic.
It suits web developers, students, and others who work with JavaScript RegExp patterns and need to check syntax while reading or writing code.
Key features
- Aggregated reference of JavaScript RegExp syntax from guide articles
- Character class definitions with matching examples
- Covers digit, word, whitespace, and Unicode escapes
- Heading links to full articles for more detail
Best for: People working with JavaScript regular expressions who need to check syntax while reading or writing code.
Good for
- Single-page summary of RegExp guide content
- Includes examples for each syntax entry
- Links to detailed guide articles
Watch out for
- Limited to JavaScript RegExp syntax
Regex Syntax Cheatsheet at a glance
- Category
- Development › Web Development
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Open source
- Not stated
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
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Regex Syntax Cheatsheet FAQ
What is the MDN Regex Syntax Cheatsheet?
It is a single-page reference on MDN Web Docs that aggregates the JavaScript RegExp guide articles.
What syntax does the cheat sheet cover?
It covers character classes, escapes, wildcards, and related RegExp capabilities with examples.
Where can I find more detail on a topic?
Headings link to the full articles in the RegExp guide for more information.
Is something wrong or out of date?
Tell us and an editor will check it.
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