Unit Test Generator
Paste a function and get a set of unit tests covering normal cases and edge cases.
Fill in the fields and hit Generate tests to see the result here.
About Unit Test Generator
Meet Unit Test Generator: paste a function and get a set of unit tests covering normal cases and edge cases. Perfect for engineers shipping side projects or production code. It's especially handy for formatting a messy API response — the kind of small task that quietly eats up your day. It's part of ChatGBT's free toolkit, with no account required.
Why use Unit Test Generator?
- Works right in your browser on any device — desktop, tablet or phone.
- Totally free with no account, sign-up or hidden limits.
- Save time — debug the root cause, not the symptom in seconds instead of doing it by hand.
- Fewer mistakes: let Unit Test Generator handle the fiddly parts so you don't have to.
- Skip the expensive software — Unit Test Generator does the job for free.
Unit Test Generator is ideal for engineers shipping side projects or production code — anyone who wants to learn by example.
Key features
- No watermarks, paywalls or usage caps.
- Works on every modern browser, mobile and desktop.
- Privacy-first: your input is used only to produce your result.
- Instant results — no waiting around or page reloads.
What you can use Unit Test Generator for
- Formatting a messy API response
- Testing a tricky regular expression
- Converting data between formats
How to use Unit Test Generator
- Add your information in the boxes above.
- Pick any options that fit what you need.
- Hit “Generate tests”.
- Review the output, copy it, and you're done.
Tips for getting the best results
- Be specific with your input — the more detail you give, the better Unit Test Generator performs.
- Try it more than once; small tweaks can noticeably improve the result.
- Bookmark Unit Test Generator so it's one click away next time you need to learn by example.
Frequently asked questions
Is my data safe with Unit Test Generator?
Your input is used only to produce your result and isn't sold or shared. See our privacy policy for the full details.
Do I need to sign up to use Unit Test Generator?
No sign-up or login is needed. Just open Unit Test Generator and start straight away.
How much does Unit Test Generator cost?
Nothing — Unit Test Generator is free to use, with no trial limits or paywall.
Who should use Unit Test Generator?
Unit Test Generator is great for engineers shipping side projects or production code who want to learn by example — for example, when formatting a messy API response.
How does Unit Test Generator work?
Fill in the fields above and choose “Generate tests”. Unit Test Generator processes your input and returns a result in seconds, right in your browser.
What is Unit Test Generator?
Paste a function and get a set of unit tests covering normal cases and edge cases. It's a free online coding tool you can use right from your browser — handy for formatting a messy API response and testing a tricky regular expression.