Compile N Run

Learn Programming and Computer Science — for Free

Compile N Run is a free, open learning platform for developers, computer science students, and self-taught programmers. We publish structured, hands-on tutorials that take you from the fundamentals to production-grade skills — no sign-up, no paywall.

Our library spans more than a dozen programming languages, popular web frameworks, databases, DevOps and observability tools, operating systems, and core CS topics such as data structures, algorithms, computer networks, and interview preparation. Every guide is organized as a progressive learning path with clear explanations, runnable code examples, and diagrams so you can learn by doing.

New here? Pick a topic below to get started, or read more about our mission and approach. Have feedback or found an error? Get in touch — we read every message.

CS Fundamentals

Interview Preparation

Interview Preparation is essential to land a job in the tech industry. It includes coding questions, system design, and behavioral questions.

Data Stucture & Algorithm

Data Structure & Algorithm is the foundation of computer science. It is essential for software development and problem-solving.

Computer Network

Computer Network is a set of computers connected to share resources and information.

Database & Information System

Database & Information System is a collection of data and a set of programs to access and manage that data.

Operating System

Operating System is system software that manages computer hardware, software resources, and provides common services for computer programs.

Python

Python 3 is a high-level, interpreted, and general-purpose programming language.

Java

Java is a object-oriented programming language designed to be platform-independent.

JavaScript

JavaScript is a client-side scripting language that enables interactive functionality on websites.

TypeScript

TypeScript is a typed superset of JavaScript that compiles to plain JavaScript.

C

C is a general-purpose programming language that is widely used for system and application development.

C++

C++ is a powerful, high-performance programming language that extends C with object-oriented capabilities.

Go

Go is a statically typed, compiled programming language designed for simplicity and efficiency.

Rust

Rust is a systems programming language focused on safety, speed, and concurrency.

SQL

SQL is a domain-specific language used in programming and managing relational databases.

PHP

The "best" language in the world.

C#

C# is a modern, object-oriented programming language developed by Microsoft.

Kotlin

Kotlin is a modern, statically typed programming language that runs on the Java Virtual Machine (JVM).

Swift

Swift is a powerful and intuitive programming language for iOS, macOS, watchOS, and tvOS app development.

Spring

Spring is a powerful, feature-rich, and flexible framework for Java.

Django

Django is a high-level Python web framework that encourages rapid development and clean, pragmatic design.

FastAPI

FastAPI is a modern, fast (high-performance), web framework for building APIs with Python 3.6+ based on standard Python type hints.

Flask

Flask is a lightweight WSGI web application framework.

Gin

Gin is a web framework written in Go (Golang).

Echo

Echo is a high performance, extensible, minimalist web framework for Go.

Next.js

Next.js is a React framework that enables functionality such as server-side rendering and generating static websites for React based web applications.

Angular

Angular is a platform and framework for building single-page client applications using HTML and TypeScript.

Express

Express is a fast, unopinionated, minimalist web framework for Node.js.

React

React is a JavaScript library for building user interfaces.

Vue.js

Vue.js is a progressive JavaScript framework used to build interactive web interfaces.

.NET

.NET is a free, cross-platform, open-source developer platform for building many different types of applications.

WordPress

WordPress is a free and open-source content management system (CMS) based on PHP and MySQL.

Grafana

Grafana is an open-source platform for monitoring and observability. It provides beautiful visualizations for time series data.

Prometheus

Prometheus is an open-source monitoring and alerting toolkit. It is designed for reliability and scalability.

Loki

Loki is a log aggregation system designed for efficiency and scalability. It is inspired by Prometheus and is optimized for fast, cost-effective log management.

Pandas

Pandas is a fast, powerful, flexible, and easy-to-use open-source data analysis and data manipulation library built on top of the Python programming language.