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Free coding certifications

Certifications that prove you can actually code.

Earn shareable, verifiable certificates by completing hands-on projects and challenges. No quizzes you can guess your way through.

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29 languages & topics·100% free
108,354certificates issued
124+unique certificates
29languages & topics
$0forever free

Browse all certifications

Pick a language or topic. Each journey awards a separate certificate per section, so you collect them as you progress.

PythonFrom fundamentals to OOP and data structures.JavaScriptThe language of the web - syntax, DOM, async.JavaObject-oriented foundations and core APIs.C++Memory, pointers, OOP, and the STL.HTML & CSSSemantic markup, layout, and modern CSS.C#.NET-ready OOP with collections and LINQ.SQLQuery, join, and design relational data.GoConcurrency, slices, and Go-style interfaces.RustOwnership, borrowing, and safe systems code.PHPServer-side scripting and web essentials.RubyExpressive syntax, blocks, and OOP done right.SwiftModern syntax for Apple platforms.KotlinNull safety, when, collections, and idiomatic functions.DartThe language behind Flutter apps.RStatistical computing and data analysis.LuaLightweight scripting for games and embeds.GDScriptGodot's scripting language, from variables to classes.CThe classic systems language - pointers and memory.AI PromptsPrompt engineering and AI-assisted workflows.AssemblyRegisters, memory, and x86-64 syscalls from scratch.SoliditySmart contracts on the EVM: state, mappings, events, and guards.ArduinoCertificate of completion for the Arduino course: C++ sketches from a blinking LED to full projects.FlutterCertificate of completion for the Flutter course: real phone apps from a business card to a store.GodotCertificate of completion for the Godot course: 2D games in GDScript, from your first node to four finished games.PygameCertificate of completion for the Pygame course: games in Python, from your first window to a space shooter, a platformer and Snake.DjangoCertificate of completion for the Django course: six Python web projects, from your first view to a JSON API.Node.jsCertificate of completion for the Node.js course: six back-end projects, from a command-line tool to a NestJS API.TerminalShell, files, and command-line fluency.ExcelFormulas, functions, and spreadsheet analysis.

Learning path certificates

Finish every step of a learning path and get one free certificate for all of it, listing each course behind it.

DevOpsLinux, Git, Docker, Kubernetes, SQL and Python, in the order the job needs them.Backend DeveloperPython, SQL, Linux, Git and Docker, before any framework.Software EngineerPython, Linux, Git, SQL, data structures and algorithms, then code others can read.Data AnalystExcel, SQL, Python, NumPy and Pandas, in the order the job uses them.Frontend DeveloperHTML, CSS, JavaScript, TypeScript, React and Next.js, then real projects.Computer NetworkingThe OSI model, IP addressing and subnetting, real terminal tools and LAN labs.Data Structures & AlgorithmsTen data structures, eight sorts, recursion, DP, graphs, then interview practice.Full Stack DeveloperThe page, the server and the database: JavaScript, React, Next.js and SQL.MERN Stack DeveloperMongoDB, Express, React and Node.js, from the first page to a secured API.Roblox Game DeveloperRoblox scripting and seven complete Roblox games.Unity Game DeveloperC#, Unity scripting and ten 3D games.Flutter App DeveloperDart, Flutter and four complete phone apps.iOS App DeveloperSwift, SwiftUI and interview practice in Swift.Data ScientistPython, SQL, statistics and machine learning.Python Game DeveloperPython and pygame, from a first window to a platformer.Godot Game DeveloperGDScript, Godot and four 2D games.

How it works

Three steps from your first line of code to a certificate you can show off.

  1. 01

    Pick a journey

    Choose any language or topic and start with the first lesson. No card, no signup wall.

  2. 02

    Code through the section

    Each section is a series of hands-on lessons and challenges where you write real code that runs in your browser.

  3. 03

    Earn & share your certificate

    Finish the section to unlock a verifiable certificate with a unique ID. Add it to LinkedIn, your CV, or your portfolio in one click.

Here's what you'll receive

A clean, professional certificate of completion with your name, the section you finished, the date, and a unique verification ID, ready to share or print.

  • Personalized with your full name
  • Unique verification ID + public URL
  • High-quality PDF download
  • One-click "Add to LinkedIn" integration
certification example

Verify a certificate

Have a certificate ID? Enter it below to confirm the certificate is genuine and view it.

Frequently asked questions

How to obtain a Coddy certification?

Pick any journey on Coddy and complete a section (finish every lesson and challenge inside it). As soon as you do, your certificate is generated automatically and added to your account.

Are Coddy certifications really free?

Yes. Every certificate on Coddy is 100% free to earn, view, download, and share. There is no hidden paywall or subscription required to receive your certificate.

Why should you get a Coddy certification?

Stand out to employers by showcasing your hands-on coding skills. Unlike video-based certificates, a Coddy certificate proves you actually wrote and tested working code, which is what hiring managers care about. It validates your expertise, attracts recruiters, and can boost your earning potential.

How can someone verify my certificate?

Every certificate has a unique ID and a public URL. Anyone, including recruiters and employers, can paste the ID into the verification tool on this page, or open the URL directly, to confirm the certificate is genuine and see the details.

Can it be showcased on LinkedIn or an other platform?

Of course, it's easy! You are provided with a URL link, PDF format and a certification ID, you can share any of those to showcase your active certification.

How long does it take to earn one certificate?

It depends on the section and your pace. Most sections take a few hours of focused practice spread over a few days. Coddy is built around short, daily sessions, so you can fit it around school or work.

Can I earn multiple certificates?

Absolutely. Each journey is split into multiple sections, and each section issues its own certificate. You can also earn certificates across different languages and topics, and many learners stack several to round out their profile.

I lost my certificate ID. What do I do?

Just sign in to your Coddy account and open this page. Every certificate you've earned is listed under "My certifications" with a direct link and download button.

Certifications in other subjects

Every subject on Coddy issues the same free, verifiable certificate. Pick a track to see its courses.

Free chess certificationsEarn free, verifiable chess certificates by completing Coddy's chess courses: rules, tactics, endgames, mates. Unique ID, public URL, one click to LinkedIn.Free math certificationsBetaEarn free, verifiable math certificates by solving real problems step by step on Coddy's math board. One per section, unique ID, public URL, one click to LinkedIn.Free physics certificationsBetaEarn free, verifiable physics certificates by solving real problems, from mechanics to modern physics. One per section, unique ID, public URL.Free chemistry certificationsBetaEarn free, verifiable chemistry certificates by building atoms and working real challenges. One per section, unique ID, public URL, one click to LinkedIn.Free cybersecurity certificatesEarn free, verifiable cybersecurity certificates by handling incidents at a simulated company. One per section, with a unique ID and a public link.
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