freeCodeCamp.org's open-source codebase and curriculum

freeCodeCamp.org is a friendly community where you can learn to code for free. It is run by a donor-supported 501(c)(3) charity to help millions of busy adults transition into tech. Our community has already helped more than 40,000 people get their first developer job.

Our full-stack web development and machine learning curriculum is completely free and self-paced. We have thousands of interactive coding challenges to help you expand your skills.

Certifications
The Learning Platform
Reporting Bugs and Issues
Reporting Security Issues and Responsible Disclosure
Contributing
Platform, Build and Deployment Status
License

Certifications

freeCodeCamp.org offers several free developer certifications. Each of these certifications involves building 5 required web app projects, along with hundreds of optional coding challenges to help you prepare for those projects. We estimate that each certification will take a beginner programmer around 300 hours to earn.

Each of these 50 projects in the freeCodeCamp.org curriculum has its own agile user stories and automated tests. These help you build up your project incrementally and ensure you've fulfilled all the user stories before you submit it.

You can pull in these test suites through freeCodeCamp's CDN. This means you can build these projects on websites like CodePen and Replit - or even on your local computer's development environment.

Once you've earned a certification, you will always have it. You will always be able to link to it from your LinkedIn or resume. And when your prospective employers or freelance clients click that link, they'll see a verified certification specific to you.

The one exception to this is if we discover violations of our Academic Honesty Policy. When we catch people unambiguously plagiarizing (submitting other people's code or projects as their own without citation), we do what all rigorous institutions of learning should do - we revoke their certifications and ban those people.

Here are our twelve core certifications:

1. Responsive Web Design Certification

Learn HTML by Building a Cat Photo App
Learn Basic CSS by Building a Cafe Menu
Learn CSS Colors by Building a Set of Colored Markers
Learn HTML Forms by Building a Registration Form
Learn the CSS Box Model by Building a Rothko Painting
Learn CSS Flexbox by Building a Photo Gallery
Learn Typography by Building a Nutrition Label
Learn Accessibility by Building a Quiz
Learn More About CSS Pseudo Selectors by Building A Balance Sheet
Learn Intermediate CSS by Building a Picasso Painting
Learn Responsive Web Design by Building a Piano
Learn CSS Variables by Building a City Skyline
Learn CSS Grid by Building a Magazine
Learn CSS Transforms by Building a Penguin
Learn CSS Animations by Building a Ferris Wheel

**Projects**: [Survey Form](https://www.freecodecamp.org/learn/2022/responsive-web-design/build-a-survey-form-project/build-a-survey-form), [Tribute Page](https://www.freecodecamp.org/learn/2022/responsive-web-design/build-a-tribute-page-project/build-a-tribute-page), [Technical Documentation Page](https://www.freecodecamp.org/learn/2022/responsive-web-design/build-a-technical-documentation-page-project/build-a-technical-documentation-page), [Product Landing Page](https://www.freecodecamp.org/learn/2022/responsive-web-design/build-a-product-landing-page-project/build-a-product-landing-page), [Personal Portfolio Webpage](https://www.freecodecamp.org/learn/2022/responsive-web-design/build-a-personal-portfolio-webpage-project/build-a-personal-portfolio-webpage)

2. JavaScript Algorithms and Data Structures Certification

Learn Introductory JavaScript by Building a Pyramid Generator
Learn Basic JavaScript by Building a Role Playing Game
Learn Form Validation by Building a Calorie Counter
Learn Basic String and Array Methods by Building a Music Player
Learn the Date Object by Building a Date Formatter
Learn Modern JavaScript Methods By Building Football Team Cards
Learn localStorage by Building a Todo App
Learn Recursion by Building a Decimal to Binary Converter
Learn Basic Algorithmic Thinking by Building a Number Sorter
Learn Advanced Array Methods by Building a Statistics Calculator
Learn Functional Programming by Building a Spreadsheet
Learn Regular Expressions by Building a Spam Filter
Learn Basic OOP by Building a Shopping Cart
Learn Intermediate OOP by Building a Platformer Game
Learn Intermediate Algorithmic Thinking by Building a Dice Game
Learn Fetch and Promises By Building an fCC Authors Page
Learn Asynchronous Programming by Building an fCC Forum Leaderboard

**Projects**: [Palindrome Checker](https://www.freecodecamp.org/learn/javascript-algorithms-and-data-structures-v8/build-a-palindrome-checker-project/build-a-palindrome-checker), [Roman Numeral Converter](https://www.freecodecamp.org/learn/javascript-algorithms-and-data-structures-v8/build-a-roman-numeral-converter-project/build-a-roman-numeral-converter), [Telephone Number Validator](https://www.freecodecamp.org/learn/javascript-algorithms-and-data-structures-v8/build-a-telephone-number-validator-project/build-a-telephone-number-validator), [Cash Register](https://www.freecodecamp.org/learn/javascript-algorithms-and-data-structures-v8/build-a-cash-register-project/build-a-cash-register), [Pokémon Search App](https://www.freecodecamp.org/learn/javascript-algorithms-and-data-structures-v8/build-a-pokemon-search-app-project/build-a-pokemon-search-app)

3. Front End Libraries Certification

Bootstrap
jQuery
Sass
React
Redux
React and Redux

**Projects**: [Random Quote Machine](https://www.freecodecamp.org/learn/front-end-development-libraries/front-end-development-libraries-projects/build-a-random-quote-machine), [Markdown Previewer](https://www.freecodecamp.org/learn/front-end-development-libraries/front-end-development-libraries-projects/build-a-markdown-previewer), [Drum Machine](https://www.freecodecamp.org/learn/front-end-development-libraries/front-end-development-libraries-projects/build-a-drum-machine), [JavaScript Calculator](https://www.freecodecamp.org/learn/front-end-development-libraries/front-end-development-libraries-projects/build-a-javascript-calculator), [25 + 5 Clock](https://www.freecodecamp.org/learn/front-end-development-libraries/front-end-development-libraries-projects/build-a-25--5-clock)

4. Data Visualization Certification

Data Visualization with D3
JSON APIs and Ajax

**Projects**: [Bar Chart](https://www.freecodecamp.org/learn/data-visualization/data-visualization-projects/visualize-data-with-a-bar-chart), [Scatterplot Graph](https://www.freecodecamp.org/learn/data-visualization/data-visualization-projects/visualize-data-with-a-scatterplot-graph), [Heat Map](https://www.freecodecamp.org/learn/data-visualization/data-visualization-projects/visualize-data-with-a-heat-map), [Choropleth Map](https://www.freecodecamp.org/learn/data-visualization/data-visualization-projects/visualize-data-with-a-choropleth-map), [Treemap Diagram](https://www.freecodecamp.org/learn/data-visualization/data-visualization-projects/visualize-data-with-a-treemap-diagram)

5. Relational Database

Learn Bash by Building a Boilerplate
Learn Relational Databases by Building a Mario Database
Learn Bash Scripting by Building Five Programs
Learn SQL by Building a Student Database: Part 1
Learn SQL by Building a Student Database: Part 2
Learn Advanced Bash by Building a Kitty Ipsum Translator
Learn Bash and SQL by Building a Bike Rental Shop
Learn Nano by Building a Castle
Learn Git by Building an SQL Reference Object

**Projects**: [Salon Appointment Scheduler](https://www.freecodecamp.org/learn/relational-database/#build-a-salon-appointment-scheduler-project), [Celestial Bodies Database](https://www.freecodecamp.org/learn/relational-database/#build-a-celestial-bodies-database-project), [Periodic Table Database](https://www.freecodecamp.org/learn/relational-database/#build-a-periodic-table-database-project), [Number Guessing Game](https://www.freecodecamp.org/learn/relational-database/#build-a-number-guessing-game-project), [World Cup Database](https://www.freecodecamp.org/learn/relational-database/#build-a-world-cup-database-project)

6. Back End Development and APIs Certification

Managing Packages with Npm
Basic Node and Express
MongoDB and Mongoose

**Projects**: [Timestamp Microservice](https://www.freecodecamp.org/learn/back-end-development-and-apis/back-end-development-and-apis-projects/timestamp-microservice), [Request Header Parser](https://www.freecodecamp.org/learn/back-end-development-and-apis/back-end-development-and-apis-projects/request-header-parser-microservice), [URL Shortener](https://www.freecodecamp.org/learn/back-end-development-and-apis/back-end-development-and-apis-projects/url-shortener-microservice), [Exercise Tracker](https://www.freecodecamp.org/learn/back-end-development-and-apis/back-end-development-and-apis-projects/exercise-tracker), [File Metadata Microservice](https://www.freecodecamp.org/learn/back-end-development-and-apis/back-end-development-and-apis-projects/file-metadata-microservice)

7. Quality Assurance Certification

Quality Assurance and Testing with Chai
Advanced Node and Express

**Projects**: [Metric-Imperial Converter](https://www.freecodecamp.org/learn/quality-assurance/quality-assurance-projects/metric-imperial-converter), [Issue Tracker](https://www.freecodecamp.org/learn/quality-assurance/quality-assurance-projects/issue-tracker), [Personal Library](https://www.freecodecamp.org/learn/quality-assurance/quality-assurance-projects/personal-library), [Sudoku Solver](https://www.freecodecamp.org/learn/quality-assurance/quality-assurance-projects/sudoku-solver), [American British Translator](https://www.freecodecamp.org/learn/quality-assurance/quality-assurance-projects/american-british-translator)

8. Scientific Computing with Python Certification

Learn String Manipulation by Building a Cipher
Learn How to Work with Numbers and Strings by Implementing the Luhn Algorithm
Learn Lambda Functions by Building an Expense Tracker
Learn List Comprehension by Building a Case Converter Program
Learn the Bisection Method by Finding the Square Root of a Number
Learn Regular Expressions by Building a Password Generator
Learn Algorithm Design by Building a Shortest Path Algorithm
Learn Recursion by Solving the Tower of Hanoi Puzzle
Learn Data Structures by Building the Merge Sort Algorithm
Learn Classes and Objects by Building a Sudoku Solver
Learn Tree Traversal by Building a Binary Search Tree
Learn Special Methods by Building a Vector Space

**Projects**: [Arithmetic Formatter](https://www.freecodecamp.org/learn/scientific-computing-with-python/build-an-arithmetic-formatter-project/build-an-arithmetic-formatter-project), [Time Calculator](https://www.freecodecamp.org/learn/scientific-computing-with-python/build-a-time-calculator-project/build-a-time-calculator-project), [Budget App](https://www.freecodecamp.org/learn/scientific-computing-with-python/build-a-budget-app-project/build-a-budget-app-project), [Polygon Area Calculator](https://www.freecodecamp.org/learn/scientific-computing-with-python/build-a-polygon-area-calculator-project/build-a-polygon-area-calculator-project), [Probability Calculator](https://www.freecodecamp.org/learn/scientific-computing-with-python/build-a-probability-calculator-project/build-a-probability-calculator-project)

9. Data Analysis with Python Certification

Data Analysis with Python Course
NumPy

**Projects**: [Mean-Variance-Standard Deviation Calculator](https://www.freecodecamp.org/learn/data-analysis-with-python/data-analysis-with-python-projects/mean-variance-standard-deviation-calculator), [Demographic Data Analyzer](https://www.freecodecamp.org/learn/data-analysis-with-python/data-analysis-with-python-projects/demographic-data-analyzer), [Medical Data Visualizer](https://www.freecodecamp.org/learn/data-analysis-with-python/data-analysis-with-python-projects/medical-data-visualizer), [Page View Time Series Visualizer](https://www.freecodecamp.org/learn/data-analysis-with-python/data-analysis-with-python-projects/page-view-time-series-visualizer), [Sea Level Predictor](https://www.freecodecamp.org/learn/data-analysis-with-python/data-analysis-with-python-projects/sea-level-predictor)

10. Information Security Certification

Information Security with HelmetJS
Python for Penetration Testing

**Projects**: [Stock Price Checker](https://www.freecodecamp.org/learn/information-security/information-security-projects/stock-price-checker), [Anonymous Message Board](https://www.freecodecamp.org/learn/information-security/information-security-projects/anonymous-message-board), [Port Scanner](https://www.freecodecamp.org/learn/information-security/information-security-projects/port-scanner), [SHA-1 Password Cracker](https://www.freecodecamp.org/learn/information-security/information-security-projects/sha-1-password-cracker), [Secure Real Time Multiplayer Game ](https://www.freecodecamp.org/learn/information-security/information-security-projects/secure-real-time-multiplayer-game)

11. Machine Learning with Python Certification

TensorFlow
How Neural Networks Work

**Projects**: [Rock Paper Scissors](https://www.freecodecamp.org/learn/machine-learning-with-python/machine-learning-with-python-projects/rock-paper-scissors), [Cat and Dog Image Classifier](https://www.freecodecamp.org/learn/machine-learning-with-python/machine-learning-with-python-projects/cat-and-dog-image-classifier), [Book Recommendation Engine using KNN](https://www.freecodecamp.org/learn/machine-learning-with-python/machine-learning-with-python-projects/book-recommendation-engine-using-knn), [Linear Regression Health Costs Calculator](https://www.freecodecamp.org/learn/machine-learning-with-python/machine-learning-with-python-projects/linear-regression-health-costs-calculator), [Neural Network SMS Text Classifier](https://www.freecodecamp.org/learn/machine-learning-with-python/machine-learning-with-python-projects/neural-network-sms-text-classifier)

12. College Algebra with Python

Learn Ratios and Proportions
Learn How to Solve for X
Learn Fractions and Decimals
Learn Functions and Graphing
Learn Linear Functions
Learn Common Factors and Square Roots
Learn How to Graph Systems of Equations
Learn How to Solve Systems of Equations
Learn Applications of Linear Systems
Learn Quadratic Equations
Learn Parent Graphs and Polynomials
Learn Business Applications of College Algebra
Learn Simple and Compound Interest
Learn Exponents and Logarithms
College Algebra with Python: Conclusion

**Projects**: [Multi-Function Calculator](https://www.freecodecamp.org/learn/college-algebra-with-python/#build-a-multi-function-calculator-project), [Graphing Calculator](https://www.freecodecamp.org/learn/college-algebra-with-python/#build-a-graphing-calculator-project), [Three Math Games](https://www.freecodecamp.org/learn/college-algebra-with-python/#build-three-math-games-project), [Financial Calculator](https://www.freecodecamp.org/learn/college-algebra-with-python/#build-a-financial-calculator-project), [Data Graph Explorer](https://www.freecodecamp.org/learn/college-algebra-with-python/#build-a-data-graph-explorer-project)

Legacy Full Stack Development Certification

Once you have earned the Responsive Web Design, Algorithms and Data Structures, Front End Development Libraries, Data Visualization, Back End Development and APIs, and Legacy Information Security and Quality Assurance certifications, you'll be able to claim your freeCodeCamp.org Full Stack Development Certification. This distinction signifies that you've completed around 1,800 hours of coding with a wide range of web development tools.

Legacy Certifications

We also have 4 legacy certifications dating back to our 2015 curriculum, which are still available. All of the required projects for these legacy certifications will remain available on freeCodeCamp.org.

Legacy Front End Development Certification
Legacy Data Visualization Certification
Legacy Back End Development Certification
Legacy Information Security and Quality Assurance Certification

Free professional certifications

(New) Foundational C# with Microsoft

Write Your First Code Using C#
Create and Run Simple C# Console Applications
Add Logic to C# Console Applications
Work with Variable Data in C# Console Applications
Create Methods in C# Console Applications
Debug C# Console Applications

**Exam**: [Foundational C# with Microsoft Certification Exam](https://www.freecodecamp.org/learn/foundational-c-sharp-with-microsoft/foundational-c-sharp-with-microsoft-certification-exam/foundational-c-sharp-with-microsoft-certification-exam)

The Learning Platform

This code is running live at freeCodeCamp.org.

Our community also has:

A forum where you can usually get programming help or project feedback within hours.
A YouTube channel with free courses on Python, SQL, Android, and a wide variety of other technologies.
A technical publication with thousands of programming tutorials and articles about mathematics and computer science.
A Discord server where you can hang out and talk with developers and people who are learning to code.

Join the community here.

Reporting Bugs and Issues

If you think you've found a bug, first read the how to report a bug article and follow its instructions.

If you're confident it's a new bug and have confirmed that someone else is facing the same issue, go ahead and create a new GitHub issue. Be sure to include as much information as possible so we can reproduce the bug.

Reporting Security Issues and Responsible Disclosure

We appreciate responsible disclosure of vulnerabilities that might impact the integrity of our platforms and users.

Read our security policy and follow these steps to report a vulnerability.

Contributing

The freeCodeCamp.org community is possible thanks to thousands of kind volunteers like you. We welcome all contributions to the community and are excited to welcome you aboard.

Please follow these steps to contribute.

Recent Contributions:

Platform, Build, and Deployment Status

The general platform status for all our applications is available at status.freecodecamp.org. The build and deployment status for the code is available in our DevOps Guide.