Code

Generate unit tests from your code

Paste your function and get a ready-to-run test suite covering the important cases.

What is Unit Test Generator?

Unit Test Generator is a free AI coding assistant that paste your function and get a ready-to-run test suite covering the important cases. It runs on a pool of leading AI models, automatically selecting the best one for your specific request, and delivers working code, bug fixes, and explanations in any programming language in seconds. No account or subscription is required. Built for developers, students, and technical founders who want to write, understand, and debug code faster, it is private by default: nothing is stored after your session ends.

✦No sign-up or account needed. Open and start immediately
✦Multi-model AI routing selects the best model for every request
✦Private by default. Session data is cleared when you close the tab

For the best results: Paste your full code or describe the goal clearly. Mention the language, what the output should do, and any constraints or libraries required.

AI can make mistakes. Check important information before relying on it.

FREE · PRIVATE · NO SIGN UP REQUIRED · NO ACCOUNT NEEDED

Use cases

What people use it for

Generate a function or script from a description

Find and fix a bug with an explanation

Translate code from one language to another

Who uses Unit Test Generator?

Developers & engineersStudentsTechnical founders

How it works

1Type your request or upload your file in the box above.
2We route it to the AI model best suited to this specific task.
3Get your result instantly. Copy, download, or refine it.

FAQ

Frequently asked questions

What programming languages does Unit Test Generator support?

Unit Test Generator supports all major languages including Python, JavaScript, TypeScript, Java, Go, Rust, C++, C#, PHP, Ruby, SQL, HTML, CSS, Bash, and more. If you can name it, it works with it.

How accurate is Unit Test Generator?

Unit Test Generator performs strongly on standard patterns and well-documented languages. Always review generated code before deploying to production. Treat it as a capable, well-reasoned first draft.

Can Unit Test Generator handle my full codebase?

Paste the relevant file or function for best results. Pro and Max plans unlock higher context limits, letting you share more code in a single request.

How does Unit Test Generator compare to GitHub Copilot or Cursor?

Unit Test Generator requires no IDE install, no subscription, and no account. Use it in any browser, on demand. For inline autocomplete as you type, Copilot and Cursor integrate deeper into your editor. Unit Test Generator excels at on-demand generation, explanation, and debugging.

Does Unit Test Generator explain the code it generates?

Yes. Every output includes a clear explanation of what the code does, why key decisions were made, and how to adapt it, making it a useful learning tool as well as a productivity tool.