Whether you're a beginner looking to accelerate your learning or a pro aiming to boost productivity, here are the best free code AI tools available in 2025.
- Codeium – Fast, Free, and Fully Featured
Codeium has emerged as one of the top contenders in the AI code assistant space. It’s 100% free for individual developers and works across more than 70 IDEs including VS Code, JetBrains, JupyterLab, and more.
Why Codeium Rocks:
- Real-time code completion powered by AI
- Works with over 40 programming languages
- Built-in AI chat for explanations and debugging
- Extremely fast and responsive
Whether you’re building web apps in JavaScript or writing backend services in Python, Codeium’s suggestions are impressively accurate and context-aware. Best of all, it doesn’t lock core features behind a paywall—everything is free.
- GitHub Copilot (Free for Students & Open Source)
GitHub Copilot, powered by OpenAI’s Codex, is still the gold standard of AI coding assistants. While it's a paid product for most users, it’s completely free for verified students and open-source contributors.
What It Offers:
- Code suggestions based on natural language comments
- Supports dozens of languages
- Integrates with popular IDEs like VS Code and JetBrains
- Context-aware suggestions across entire files
If you qualify for free access, Copilot delivers a premium experience with minimal setup. It feels like pair programming with an expert developer who knows every language.
- Amazon CodeWhisperer – Ideal for Cloud Devs
Amazon CodeWhisperer is Amazon’s answer to AI-powered code completion. It’s free for individual use and integrates well with AWS tooling and services.
Key Features:
- Code suggestions tailored to your current project
- Support for Python, JavaScript, Java, and more
- Works within VS Code and JetBrains IDEs
- Detects security risks in generated code
If you work with AWS, CodeWhisperer is a no-brainer. It even recommends AWS SDK snippets based on your code context, speeding up serverless and cloud-native app development.
- Keploy – Free AI Testing Tool for Developers
While most AI tools focus on writing code, Keploy focuses on testing it—automatically. It’s a free and open-source testing tool that turns your API calls into test cases without any manual work.
What Keploy Does:
- Captures real API traffic
- Auto-generates unit, integration, and end-to-end tests
- Creates mocks for external dependencies
- Supports Python, Go, Java, and more
If you're building microservices or APIs, Keploy helps you boost test coverage and reliability without writing a single test manually. It's a must-have for backend developers who care about clean, tested code.
???? Try Keploy on GitHub
- Replit Ghostwriter (Free Credits Available)
Replit Ghostwriter brings the power of AI coding to your browser. While it’s primarily a paid feature, Replit offers free Ghostwriter credits to all new users so you can try it at no cost.
Why It’s Great:
- Code in the cloud with no installations
- Autocomplete, AI chat, and error detection
- Ideal for learning, prototyping, and collaboration
- Works with multiple languages and frameworks
If you like to code on the go or want a no-setup environment, Ghostwriter is a great AI sidekick—especially for students and hobbyists.
- Tabnine (Free Tier)
Tabnine is an AI code assistant that offers a free basic tier, supporting autocompletion across many languages. It's known for its emphasis on privacy—suggestions are generated locally in many cases.
What It Offers:
- Fast AI-based autocompletion
- Integrates with VS Code, IntelliJ, and more
- Free tier with no time limit
- Lightweight and privacy-focused
It’s a great option for devs who want to use AI tools but prefer to keep their codebase private and offline.
Which Free Code AI Tool Should You Use?
| Tool | Best For | Cost |
| Codeium | All-around devs, no limits | Free for all |
| GitHub Copilot | Students, open-source devs | Free w/ eligibility |
| CodeWhisperer | AWS/cloud-based development | Free (individual) |
| Keploy | Testing APIs and microservices | Free & open-source |
| Replit Ghostwriter | Coding in the browser | Free credits |
| Tabnine | Lightweight and private devs | Free basic plan |
Final Thoughts
AI is no longer the future of coding—it’s the present. Whether you're building complex software systems or writing your first script, free code AI tools can significantly accelerate your development process.
From writing code (Codeium, Copilot) to testing it (Keploy), and even deploying to the cloud (CodeWhisperer), you can now build robust applications without lifting a finger more than necessary.
And the best part? You don’t have to pay to play.
Read more https://keploy.io/blog/community/best-free-ai-code-generators