Regex cheatsheet

Regex cheatsheet. Javascript Regex/Regular Expression cheatsheet Master regular expressions with our free online regex memo.

This comprehensive reference guide provides a quick and easy way to look up essential regex syntax, including character classes, quantifiers, anchors, and lookarounds.

Whether you are a beginner learning the basics or an experienced developer needing a quick reminder for complex patterns, our cheat sheet has you covered.

If you are building search patterns for your logs, our Crontab Generator and Regex Tester are perfect companion tools to streamline your development process. Explore our curated list of tokens to become more efficient with pattern matching.

This premium regex cheat sheet covers everything from basic literal matches to advanced backreferences and group captures, ensuring you always have the right syntax at your fingertips.

Keeping your patterns robust and maintainable is easy with our Regex Tester, which pairs perfectly with the reference listed here to validate your logic in real-time.

We provide a 100% free, private, and secure way to access the most important regex documentation right in your browser, helping you avoid common syntax errors and speed up your coding sessions.

How to use this online tool

Regex cheatsheet is designed for fast browser workflows when you need to format, validate, convert, decode, encode, generate, or inspect data without opening a heavy desktop app. Start with the input field or visible options, review the result, then copy or download the output for the next step.

Private processing in your browser

Regex cheatsheet keeps the normal processing step local in your browser. That is useful for code snippets, tokens, documents, configuration values, text samples, and other material that should not be sent to a remote service unless you explicitly choose to share it.

When this tool is useful

Use Regex cheatsheet for repeatable developer tasks, technical documentation, QA checks, quick conversions, debugging, content cleanup, and internal team workflows. The page focuses on clear inputs, immediate feedback, and output that is easy to reuse in code, reports, tickets, emails, or notes.

Practical tips

Before copying the final result, check important details such as spacing, casing, filenames, encoding, token structure, line breaks, or output format. Small checks prevent mistakes when the result is reused in source code, API requests, documentation, spreadsheets, or shared files.