Test Generator
Model:
Paste a function or class and get unit tests written the way each framework expects: pytest, Jest, JUnit, Go testing, RSpec, PHPUnit, XCTest, xUnit, GoogleTest or cargo test. Choose how thorough to be, from happy-path only to edge cases, property-based or exhaustive.
Run command
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Result
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Build unit tests and full suites with free AI, ready to drop into your project.
How to Use Test Generator
1
Open Test Generator
Open Test Generator on Rewind.ai. No account needed to start.
2
Add your input
Enter your text or upload a file, then set any options Test Generator offers.
3
Get the result
Test Generator runs on our own GPU servers and returns a result in seconds. Download it, copy it, or share the link.
Use this tool via API
Call this tool straight from your own scripts. The endpoint follows the OpenAI REST format and signs requests with a bearer token, so client libraries you already use keep working. You are billed the same token rate as the web app.
curl -X POST https://api.rewind.ai/v1/chat/completions/ \
-H "Authorization: Bearer sk-rewind-..." \
-H "Content-Type: application/json" \
-d '{"model": "qwen/qwen3-coder", "messages": [{"role": "user", "content": "Generate pytest tests for this Python function..."}]}'Related Free AI Tools
Test Generator FAQ
Test Generator on Rewind.ai is a free AI tool. There's no charge and no sign up needed to start.
Yes. You get 2,500 free tokens per day to use Test Generator and every other tool on Rewind.ai. A free account raises that to 5,000 tokens/day. You can buy more starting at $1.
Test Generator runs open-source AI models on our GPU servers. Send your request and the result comes back in seconds.
No. You can use Test Generator right away without signing up. A free account doubles your daily usage to 5,000 tokens and saves your history.
Anonymous users get 2,500 tokens/day. Free accounts get 5,000 tokens/day. Tokens reset every 24 hours. Each generation costs ~100-5,000 tokens depending on the operation.
Your data is processed on our servers and isn't stored permanently unless you choose to save it. We don't sell or share it.
Yes. Content from Test Generator is yours to use for personal or commercial work. The AI models we run are commercially licensed.
Test Generator matches the quality of paid services because it runs the latest open-source AI models. The difference is you don't pay per use.
Test Generator runs open-source AI models including Qwen 2.5, FLUX and Whisper. We update to newer models as they ship.
Yes. Test Generator works in any mobile browser, and the layout adapts to your screen size.
Sign up for a free account to get 5,000 tokens/day, double the anonymous limit. Or buy token packs starting at $5 for 200,000 tokens. See /pricing/ for all options.
Yes. After you generate content, you can download it, copy it, or share it via a unique link. Signed-in users can also view their generation history.
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