# Coddy

> Coddy (coddy.tech) is an interactive coding education platform that teaches programming through hands-on practice, AI-assisted learning, daily coding challenges, free in-browser playgrounds, reference documentation, and gamified progression. Built by a team with backgrounds at Meta and Intel, Coddy supports 18+ programming languages and is available in 10 UI languages.

## Core Features

- Interactive coding courses with in-browser code execution and instant feedback
- Daily coding challenges with difficulty levels (Easy, Medium, Hard) and streak rewards
- AI-powered learning assistant for code explanations, hints, and solution walkthroughs
- Free multi-language code playground that runs in the browser with stdin support
- Reference documentation for Python, JavaScript, Java, C++, SQLite, Verilog, and Zero
- 35+ free developer tools (formatters, encoders, generators, converters)
- Gamification system with XP, streaks, badges, leaderboards, chests, and a virtual store
- Professional certifications upon course completion (shareable on LinkedIn)
- Curated learning journeys (Python, JavaScript, Beginner, Interview Prep, and more)
- Mobile apps (iOS and Android)
- Teams plans for organizations and bootcamps

## Learning Hubs

- [Home](https://coddy.tech/): Product landing page with feature overview and FAQ
- [All Courses Hub](https://coddy.tech/landing): Index of every per-language landing - canonical entry point for the course catalog
- [Which Programming Language to Learn](https://coddy.tech/which-programming-language-to-learn): Free 30-second quiz that recommends the best language for your goals, then sends you straight into hands-on lessons. Available in 10 languages.
- [Global Courses Catalog](https://coddy.tech/landing/courses): Cross-language course directory with filters
- [Learning Journeys](https://coddy.tech/journeys): All curated multi-course learning paths
- [Default Journey](https://coddy.tech/journeys/default): Recommended starting journey for new learners
- [Coding Challenges](https://coddy.tech/practice): Practice problems filtered by language and difficulty
- [Daily Challenge](https://coddy.tech/challenges/daily): A new coding challenge every day with bonus rewards
- [Certifications Hub](https://coddy.tech/certifications): Earn verified, shareable programming certifications
- [Mobile Apps](https://coddy.tech/apps): iOS and Android apps for learning on the go

## Courses on `/landing/*`

The course catalog is organized entirely under `/landing/*`. Each per-language hub (`/landing/{homeId}`) summarizes the available courses, challenges, AI features, and certification for that language. Catalogs, topic hubs, and per-course pages all live under the same tree.

Per-language hubs (`/landing/{homeId}`):

- [Python](https://coddy.tech/landing/python)
- [JavaScript](https://coddy.tech/landing/javascript)
- [Java](https://coddy.tech/landing/java)
- [C++](https://coddy.tech/landing/cpp)
- [C](https://coddy.tech/landing/c)
- [C#](https://coddy.tech/landing/csharp)
- [HTML](https://coddy.tech/landing/html)
- [CSS](https://coddy.tech/landing/css)
- [SQL](https://coddy.tech/landing/sql)
- [Go](https://coddy.tech/landing/go)
- [PHP](https://coddy.tech/landing/php)
- [R](https://coddy.tech/landing/r)
- [Dart](https://coddy.tech/landing/dart)
- [Rust](https://coddy.tech/landing/rust)
- [Lua](https://coddy.tech/landing/lua)
- [Ruby](https://coddy.tech/landing/ruby)
- [Swift](https://coddy.tech/landing/swift)
- [AI Prompts](https://coddy.tech/landing/prompts)
- [Terminal / Shell](https://coddy.tech/landing/terminal)

Topic-focused section landings (subset of a parent journey, indexed at their own SEO-friendly URL):

- [TypeScript](https://coddy.tech/landing/typescript) - TypeScript section of the JavaScript journey
- [Git](https://coddy.tech/landing/git) - Version Control section of the Terminal journey
- [Docker](https://coddy.tech/landing/docker) - Docker & Containers section of the Terminal journey (simulated, hands-on)
- [CSS](https://coddy.tech/landing/css) - Styling with CSS + CSS Mastery sections of the HTML journey

Catalog, topic, and course detail URLs:

- `/landing` - all-languages hub
- `/landing/courses` - global cross-language courses catalog
- `/landing/{homeId}/courses` - courses catalog for one language (e.g. [/landing/python/courses](https://coddy.tech/landing/python/courses))
- `/landing/topic/{topicSlug}` - cross-language topic hub (e.g. data structures, algorithms)
- `/landing/{homeId}/topic/{topicSlug}` - per-language topic hub (e.g. `/landing/python/topic/oop`)
- `/landing/courses/{courseId}` - per-course detail page
- All of the above are also available with a UI-language prefix: `/landing/{uiLang}/...` (e.g. `/landing/es/python`).

## Curated Learning Paths

- [Python Path](https://coddy.tech/python): Dedicated Python learning track from basics to advanced
- [Beginner Path](https://coddy.tech/beginner): Entry-level programming journey for new coders
- [Interview Prep](https://coddy.tech/interview_prep): Coding interview preparation with targeted courses

## Documentation (`/docs`)

In-browser reference docs with runnable code examples, organized by topic and concept.

- [Docs Home](https://coddy.tech/docs): Index of all documentation topics
- [Python Docs](https://coddy.tech/docs/python): Syntax, data types, control flow, functions, OOP, and more
- [JavaScript Docs](https://coddy.tech/docs/javascript): Language reference for JavaScript
- [Java Docs](https://coddy.tech/docs/java): Syntax, variables, control flow, collections, methods, OOP, generics, and more
- [C++ Docs](https://coddy.tech/docs/cpp): Syntax, pointers and memory, the STL (vector, map, set, algorithms), templates, OOP, and more
- [SQL Docs](https://coddy.tech/docs/sqlite): SQL / SQLite reference
- [Verilog Docs](https://coddy.tech/docs/verilog): Verilog HDL reference
- [Zero Docs](https://coddy.tech/docs/zero): Reference for the Zero programming language
- Individual concept pages live at `/docs/{topic}/{concept}`. Available in 10 languages.

## Playground (`/playground`)

Free in-browser code editor and runner with stdin support, no sign-up required.

- [Python Playground](https://coddy.tech/playground/python) (canonical `/playground` redirects here)
- [JavaScript Playground](https://coddy.tech/playground/javascript)
- [TypeScript Playground](https://coddy.tech/playground/typescript)
- [Java Playground](https://coddy.tech/playground/java)
- [C++ Playground](https://coddy.tech/playground/cpp)
- [C Playground](https://coddy.tech/playground/c)
- [C# Playground](https://coddy.tech/playground/csharp)
- [Go Playground](https://coddy.tech/playground/go)
- [Ruby Playground](https://coddy.tech/playground/ruby)
- [Rust Playground](https://coddy.tech/playground/rust)
- [PHP Playground](https://coddy.tech/playground/php)
- [Dart Playground](https://coddy.tech/playground/dart)
- [Lua Playground](https://coddy.tech/playground/lua)
- [Swift Playground](https://coddy.tech/playground/swift)
- [HTML/CSS Playground](https://coddy.tech/playground/html)
- [SQL Playground](https://coddy.tech/playground/sql) (SQLite)
- [R Playground](https://coddy.tech/playground/r)
- [Terminal / Shell Playground](https://coddy.tech/playground/terminal)
- [Zero Playground](https://coddy.tech/playground/zero)
- [Solidity Playground](https://coddy.tech/playground/solidity)
- [Verilog Playground](https://coddy.tech/playground/verilog)
- [Embeddable Code Editor](https://coddy.tech/embed): Add a free, runnable code editor to any website with one iframe. Supports 15+ languages, light/dark themes, no setup. Available in 10 languages.

## Free Developer Tools (`/tools`)

35+ browser-based utilities for developers. No sign-up; everything runs client-side.

- [Tools Index](https://coddy.tech/tools)
- [JSON Formatter](https://coddy.tech/tools/json-formatter)
- [SQL Formatter](https://coddy.tech/tools/sql-formatter)
- [Regex Tester](https://coddy.tech/tools/regex-tester)
- [Markdown Editor](https://coddy.tech/tools/markdown-editor)
- [Base64 Encoder / Decoder](https://coddy.tech/tools/base64)
- [URL Encoder / Decoder](https://coddy.tech/tools/url-encoder)
- [JWT Decoder](https://coddy.tech/tools/jwt-decoder)
- [UUID Generator](https://coddy.tech/tools/uuid-generator)
- [CSS Gradient Generator](https://coddy.tech/tools/css-gradient-generator)
- [Password Generator](https://coddy.tech/tools/password-generator)
- [Timestamp Converter](https://coddy.tech/tools/timestamp-converter)
- [Color Converter](https://coddy.tech/tools/color-converter)
- [Cron Expression Builder](https://coddy.tech/tools/cron-expression)
- [HTTP Status Codes Reference](https://coddy.tech/tools/http-status-codes)
- [Diff Checker](https://coddy.tech/tools/diff-checker)
- [Hash Generator](https://coddy.tech/tools/hash-generator)
- [Case Converter](https://coddy.tech/tools/case-converter)
- [Number Base Converter](https://coddy.tech/tools/number-base-converter)
- [cURL Converter](https://coddy.tech/tools/curl-converter)
- [Favicon Generator](https://coddy.tech/tools/favicon-generator)
- [Open Graph Preview](https://coddy.tech/tools/og-preview)
- [Contrast Checker](https://coddy.tech/tools/contrast-checker)
- [Glassmorphism Generator](https://coddy.tech/tools/glassmorphism-generator)
- [.gitignore Generator](https://coddy.tech/tools/gitignore-generator)
- [QR Code Generator](https://coddy.tech/tools/qr-code-generator)
- [Lorem Ipsum Generator](https://coddy.tech/tools/lorem-ipsum-generator)
- [Word Counter](https://coddy.tech/tools/word-counter)
- [Box Shadow Generator](https://coddy.tech/tools/box-shadow-generator)
- [Cubic Bezier Editor](https://coddy.tech/tools/cubic-bezier)
- [ASCII Art Generator](https://coddy.tech/tools/ascii-art-generator)
- [Fancy Text Generator](https://coddy.tech/tools/fancy-text-generator)
- [Typing Speed Test](https://coddy.tech/tools/typing-speed-test)
- [SVG Blob Generator](https://coddy.tech/tools/svg-blob-generator)

## Cheat Sheets (`/cheat-sheets`)

Free, copy-paste programming quick-reference tables - syntax, commands, and common patterns on one page per topic. Localized into 10 languages with full hreflang.

- [Cheat Sheets Index](https://coddy.tech/cheat-sheets)
- [SQL Cheat Sheet](https://coddy.tech/cheat-sheets/sql)
- [Python Cheat Sheet](https://coddy.tech/cheat-sheets/python)
- [Git Cheat Sheet](https://coddy.tech/cheat-sheets/git)
- [Linux Commands Cheat Sheet](https://coddy.tech/cheat-sheets/linux-commands)
- [JavaScript Cheat Sheet](https://coddy.tech/cheat-sheets/javascript)
- [TypeScript Cheat Sheet](https://coddy.tech/cheat-sheets/typescript)
- [Regex Cheat Sheet](https://coddy.tech/cheat-sheets/regex)
- [HTML Cheat Sheet](https://coddy.tech/cheat-sheets/html)
- [CSS Cheat Sheet](https://coddy.tech/cheat-sheets/css)
- [Java Cheat Sheet](https://coddy.tech/cheat-sheets/java)
- [C++ Cheat Sheet](https://coddy.tech/cheat-sheets/cpp)
- [C Cheat Sheet](https://coddy.tech/cheat-sheets/c)
- [C# Cheat Sheet](https://coddy.tech/cheat-sheets/csharp)
- [Go Cheat Sheet](https://coddy.tech/cheat-sheets/go)
- [PHP Cheat Sheet](https://coddy.tech/cheat-sheets/php)
- [Rust Cheat Sheet](https://coddy.tech/cheat-sheets/rust)
- [Ruby Cheat Sheet](https://coddy.tech/cheat-sheets/ruby)
- [Swift Cheat Sheet](https://coddy.tech/cheat-sheets/swift)
- [Dart Cheat Sheet](https://coddy.tech/cheat-sheets/dart)
- [Lua Cheat Sheet](https://coddy.tech/cheat-sheets/lua)
- [R Cheat Sheet](https://coddy.tech/cheat-sheets/r)
- [Verilog Cheat Sheet](https://coddy.tech/cheat-sheets/verilog)
- [Terminal Cheat Sheet](https://coddy.tech/cheat-sheets/terminal)
- Localized routes use the `/cheat-sheets/{lang}/{slug}` pattern.

## Blog (`/blog`)

Tutorials, guides, and stories from the Coddy team. Localized into 10 languages with full hreflang.

- [Blog Home](https://coddy.tech/blog)
- [RSS Feed](https://coddy.tech/blog/feed.xml)
- Posts live at `/blog/{tag}/{slug}` (e.g. `/blog/python/install-python-on-windows`).
- Tag indexes at `/blog/tag/{tag}` and author pages at `/blog/author/{authorId}`.

## Community

- [Leaderboard](https://coddy.tech/leaderboard): Community rankings by XP, streaks, and challenge completions
- [Referral Program](https://coddy.tech/refer): Invite friends and earn rewards
- [Become a Creator](https://coddy.tech/creator): Create and publish courses on Coddy
- [Affiliate Program](https://coddy.tech/affiliate): Tiered affiliate program for content creators (up to 40% commission, 30-day cookies). Available in 10 languages.
- [Partner](https://coddy.tech/partner): Partnership inquiries
- [Influencer](https://coddy.tech/influencer): Influencer collaboration program
- [Students](https://coddy.tech/students): Student-focused offers and resources

## Ratings & Reviews

- iOS App Store: 4.9 / 5 - [App Store listing](https://apps.apple.com/app/id6755648162)
- Google Play: 4.8 / 5 - [Google Play listing](https://play.google.com/store/apps/details?id=tech.coddy.coddyapp)
- Trustpilot: [coddy.tech on Trustpilot](https://www.trustpilot.com/review/coddy.tech)

## Product

Pricing and premium-plan details (`/pricing`, `/premium`) live behind authentication and are not part of the public, indexable surface.

- [Teams](https://coddy.tech/teams): Team-based learning with seat pricing for organizations and bootcamps
- [AI Assistant](https://coddy.tech/ai_assistant): AI-powered code explanations, hints, and solution analysis
- [Store](https://coddy.tech/store): Virtual store for boosters, cosmetics, and avatar items
- [Discount Codes](https://coddy.tech/coddy-discount-promo-code): Active promo codes and discounts

## Programming Languages Supported

Python, JavaScript, TypeScript, Java, C, C++, C#, Go, PHP, Ruby, Rust, Swift, Dart, Lua, R, SQL (SQLite only), HTML, CSS, Zero, Solidity, Verilog, plus AI Prompts and Terminal/Shell tracks.

## Localization

UI is available in 10 languages: English (`en`), Spanish (`es`), Portuguese (`pt`), Turkish (`tr`), French (`fr`), German (`de`), Russian (`ru`), Japanese (`ja`), Korean (`ko`), Arabic (`ar`).

Localized routes use a `/{lang}` prefix (English is the unprefixed default):

- Homepages: `/`, `/es`, `/pt`, `/tr`, `/fr`, `/de`, `/ru`, `/ja`, `/ko`, `/ar`
- Docs: `/docs/{lang}`, `/docs/{lang}/{topic}`, `/docs/{lang}/{topic}/{concept}`
- Playground: `/playground/{lang}/{playgroundLanguage}`
- Tools: `/tools/{lang}`, `/tools/{lang}/{toolSlug}`
- Landings: `/landing/{lang}`, `/landing/{lang}/{homeId}`
- Blog: `/blog/{lang}`, `/blog/{lang}/{tag}/{slug}`
- Certifications: `/certifications/{lang}`, `/certification/{lang}/{certificationId}`
- FAQs, Teams, Contact, Press, Careers, Embed, Affiliate, Apps, Discount, Which-Programming-Language-to-Learn: same `/{page}/{lang}` pattern

## Sitemap

- [Sitemap Index](https://coddy.tech/sitemap.xml)
- [Pages](https://coddy.tech/sitemap/pages.xml)
- [Landings](https://coddy.tech/sitemap/landing.xml)
- [Certifications](https://coddy.tech/sitemap/certifications.xml)
- [Blog](https://coddy.tech/sitemap/blog.xml)
- [Docs](https://coddy.tech/sitemap/docs.xml)
- [Playground](https://coddy.tech/sitemap/playground.xml)
- [Tools](https://coddy.tech/sitemap/tools.xml)
- [Cheat Sheets](https://coddy.tech/sitemap/cheat-sheets.xml)

## Company

- [About](https://coddy.tech/about): About Coddy and the team
- [Contact](https://coddy.tech/contact): Get in touch with the Coddy team
- [Press & Brand Kit](https://coddy.tech/press): Logos, brand colors, founder bios, boilerplate copy, and press contact. Available in 10 languages.
- [Careers](https://coddy.tech/careers): Open roles, company mission, values, perks, and the hiring process at Coddy. Available in 10 languages.
- [FAQs](https://coddy.tech/faqs): Frequently asked questions
- [Privacy Policy](https://coddy.tech/privacy): Privacy policy
- [Terms of Service](https://coddy.tech/terms): Terms of service

## Account & Personal

- [Login](https://coddy.tech/login): Sign in with Google, Facebook, Apple, email, or anonymously
- [Onboarding](https://coddy.tech/onboard): New-user onboarding flow
- [User Profile](https://coddy.tech/profile): Personal dashboard with stats, badges, and progress
- [Settings](https://coddy.tech/settings): Account settings
- [Avatar Customization](https://coddy.tech/avatar): Create and customize your coding avatar
- [Goals](https://coddy.tech/goals): Set and track personal learning goals
- [Streak Tracking](https://coddy.tech/streak): Monitor your daily coding streak
- [Notifications](https://coddy.tech/notifications): View activity notifications
- [Projects](https://coddy.tech/projects): Personal code projects