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Code Docstring / Comment Generator

Code

Paste a function or class and get a documentation comment written in the idiomatic style for its language, JSDoc, a Google-style Python docstring, Javadoc, rustdoc, and similar, plus the original code with the comment inserted above it.

Writing a proper doc comment by hand, one with an accurate parameter list, return type, and a description that actually explains intent rather than restating the signature, is exactly the busywork this tool removes. Paste a function or class and GPT-4o mini reads the code and writes a doc comment in the idiomatic style for its language, JSDoc for JavaScript and TypeScript, a Google-style docstring for Python, Javadoc for Java, rustdoc for Rust, and returns both the comment on its own and the original code with the comment inserted above it. This is a server-backed AI tool, not a browser-only utility, so the code you paste is sent to OpenAI's API to generate the response. It reasons from the code text alone, so an ambiguous parameter name or an intentionally undocumented edge case can produce a plausible-sounding but slightly wrong description, worth a quick read before committing it.

docstringcommentaigeneratedocumentationjsdoc

How to use Code Docstring / Comment Generator

  • 1.Paste a function or class definition, or load one of the built-in examples.
  • 2.Optionally set a language or a specific doc comment style (JSDoc, Google, NumPy); leave both blank to let it infer from the code.
  • 3.Copy the generated doc comment on its own, or the annotated version with the comment already inserted above your code.

Frequently asked questions

Does this run in my browser or on a server?
Generation calls GPT-4o mini on the server since it requires an LLM, so the code you paste is sent to OpenAI's API to generate the response.
Is the generated doc comment guaranteed to be accurate?
No, it reasons from the code text alone with no access to your test suite or the rest of your codebase, so an ambiguous parameter name or subtle edge case can lead to a plausible but imprecise description. Read it before committing.
What doc comment styles does it support?
It defaults to the idiomatic style for the detected language (JSDoc for JavaScript/TypeScript, Google-style for Python, Javadoc for Java, rustdoc for Rust, and similar), or you can request a specific style like NumPy-style Python docstrings in the style field.
How many can I generate?
The free plan includes 3 generations per month and Pro includes 25, shared with the site's other AI tools' own monthly quotas. Usage shows on your dashboard.

Use via API, SDK, or MCP

cURL# Free: a few generations/month · Pro: more per month
curl -X POST api.utilix.tech/v1/ai/docstring \
  -H "Authorization: Bearer utx_live_..." \
  -H "Content-Type: application/json" \
  -d '{"prompt": "..."}'

Free plan includes a monthly quota; Pro raises the limit. Get an API key from your dashboard · Full API docs →

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