Comprehensive regular expression reference with searchable patterns, quantifiers, anchors, groups, lookahead, and character classes. Click any pattern to copy it instantly.
About the Regex Cheatsheet
Regular expressions (regex) are powerful pattern-matching sequences used in search, replace, and validation tasks across virtually every programming language. Our Regex Cheatsheet provides a comprehensive, searchable reference of the most commonly used regex patterns, quantifiers, anchors, groups, and advanced constructs like lookahead and lookbehind. Whether you're a beginner learning regex for the first time or an experienced developer who needs a quick reference, this tool gives you instant access to every pattern you need.
How to Use This Regex Reference
Search or Browse: Use the search bar to find specific patterns by keyword, or scroll through the categorized sections to explore all available regex constructs.
Click to Copy: Click on any pattern row to instantly copy the regex snippet to your clipboard. A toast notification confirms the copy action.
Test Your Patterns: Paste the copied pattern into your code editor, regex tester, or wherever you need it. All patterns are provided in standard PCRE/JavaScript-compatible syntax.
Combine and Customize: Use the building blocks from this cheatsheet to compose complex regex patterns tailored to your specific matching requirements.
Features
Searchable ReferenceType any keyword to instantly filter and find the exact regex pattern you need from the complete collection.
Click-to-Copy PatternsEvery pattern can be copied to your clipboard with a single click, complete with a confirmation toast notification.
Categorized SectionsPatterns are organized into logical categories: Character Classes, Quantifiers, Anchors, Groups, Lookahead, and more.
Descriptive LabelsEach pattern includes a clear human-readable description so you understand exactly what it matches before copying.
Dark Mode SupportSeamlessly switches between light and dark themes for comfortable viewing in any environment.
Cross-Language CompatibleAll patterns use standard syntax compatible with JavaScript, Python, PHP, Java, and other major languages.
Benefits of Using Our Regex Cheatsheet
Stop wasting time searching through documentation or Stack Overflow for regex patterns. Our cheatsheet consolidates hundreds of commonly used patterns into a single, instantly searchable page. Each pattern is tested for correctness and comes with clear descriptions. The click-to-copy feature eliminates transcription errors, and the categorized layout helps you discover patterns you might not have known existed.
Who Uses This Regex Tool?
Web DevelopersValidate form inputs, parse URLs, extract data from HTML, and process user-submitted content with confidence.
Data EngineersClean and transform data pipelines using powerful pattern matching for ETL processes and log parsing.
DevOps EngineersWrite grep patterns, configure log monitoring, and set up alerting rules with precise regex matching.
Students & LearnersLearn regex incrementally by exploring categorized patterns with clear descriptions of what each one matches.
Why TooliFyra's Regex Cheatsheet?
Unlike static PDF cheatsheets or outdated web pages, TooliFyra's Regex Cheatsheet is a live, interactive tool that updates with your search queries. The instant copy functionality, combined with organized categories and dark mode support, makes it the most practical regex reference available online. It's free, fast, and works directly in your browser with no sign-up required.
Frequently Asked Questions
A regular expression (regex) is a sequence of characters that defines a search pattern. It is used to match, locate, and manage text in strings. Regex is supported in most programming languages and tools, making it one of the most versatile text-processing tools available.
Most patterns in this cheatsheet use standard syntax supported by JavaScript, Python, PHP, Java, and other major languages. Some advanced features like lookbehind may have limited support in older environments. When a pattern has language-specific variations, it is noted in the description.
You can test regex patterns using browser developer tools (console.test()), online regex testers like regex101.com, or directly in your code. Simply copy the pattern from this cheatsheet and paste it into your preferred testing environment.
Absolutely! Many patterns in this cheatsheet are specifically designed for input validation, such as email addresses, phone numbers, URLs, and IP addresses. These are commonly used in form validation on both client-side and server-side code.
