Fast Reference for Developers
Quick, searchable references for programming languages, frameworks, tools, and more. Everything you need at your fingertips.
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Explore our comprehensive collection of references organized by topic
Programming Languages
Quick reference for popular programming languages
123 referencesWeb Development
HTML, CSS, JavaScript frameworks and tools
97 referencesDatabases & Data
SQL, NoSQL, and data manipulation
65 referencesTools & DevOps
Git, Docker, CLI tools and more
104 referencesDesign & Frontend
CSS Grid, Flexbox, design principles
18 referencesKeyboard Shortcuts
Speed up your workflow
12 referencesEditors & IDEs
Code editor shortcuts and configurations
16 referencesGames & Hobbies
Chess, photography, guitar and more
10 referencesOther Resources
Markdown, YAML, HTTP codes and more
8 referencesMobile Development
React Native, Flutter, Swift, Kotlin for mobile apps
8 referencesCloud & Infrastructure
Azure, GCP, serverless, cloud services
12 referencesSecurity & Networking
HTTPS, security best practices, networking protocols
12 referencesTesting & QA
Unit testing, Jest, Cypress, Selenium, testing frameworks
15 referencesAPI & Protocols
REST, GraphQL, WebSockets, gRPC, API design
14 referencesMachine Learning & AI
TensorFlow, PyTorch, scikit-learn, ML frameworks
14 referencesProject Management
Agile, Scrum, Jira, project management tools
18 referencesOperating Systems
Windows, macOS commands, PowerShell, system administration
16 referencesPerformance & Optimization
Caching, CDN, performance best practices
18 references
Your Go To Resource for Programming References
FreeReference is a comprehensive library of programming references designed to help developers of all skill levels work more efficiently. Whether you're a seasoned professional needing a quick syntax reminder or a beginner learning the fundamentals, our references provide clear, concise information without the fluff.
Unlike traditional documentation that can be overwhelming and hard to navigate, our references are organized into digestible sections with practical code examples you can copy and use immediately. We focus on the most commonly used features and patterns, so you spend less time searching and more time coding.
Every reference is carefully crafted to be scannable and easy to understand. We strip away the unnecessary complexity and give you exactly what you need to get the job done. From JavaScript array methods to SQL query syntax, from Git commands to CSS flexbox properties, we've got you covered.
What You'll Find Here
A growing collection of developer resources
Programming Languages
Quick references for popular languages including JavaScript, Python, PHP, Java, C#, and more. Find syntax examples, common patterns, built-in methods, and language-specific features all in one place. Perfect for when you need to remember how to format a date, manipulate strings, or work with arrays.
Web Development
Everything you need for building modern websites and web applications. HTML5 semantic elements, CSS3 properties including Flexbox and Grid, responsive design techniques, and front-end framework references. Stop googling the same CSS properties over and over.
Databases & SQL
SQL query references for MySQL, PostgreSQL, SQLite, and more. From basic SELECT statements to complex JOINs, aggregations, and subqueries. Also includes NoSQL references for MongoDB and other document databases. Never forget the difference between LEFT JOIN and INNER JOIN again.
Tools & Command Line
Essential command references for Git, Docker, npm, Linux/Unix shells, and other developer tools. Includes the most useful commands with practical examples and common options. Great for those commands you use just infrequently enough to forget the exact syntax.
How It Works
Find the information you need in seconds
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Syntax Highlighted
Code examples with proper syntax highlighting for better readability.
Regularly Updated
Our references are kept up-to-date with the latest best practices.
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