Nobody Likes Writing Comments. Do It Anyway.
We all know we should comment our code. We also know we almost never do it, especially at 4 PM on a Friday when the feature needs to ship. Then six months later, someone (often you) opens that file and has absolutely no idea what’s going on.
The Code Comment Generator takes your uncommented code, and adds JSDoc blocks, inline explanations, or block comments — whatever style you pick. It won’t rewrite or restructure anything. Your logic stays untouched; it just gets documented.
The comments it generates are decent starting points. They’ll accurately describe what functions do, what parameters they accept, and what gets returned. For tricky logic sections, inline comments explain the reasoning. You’ll still want to review them — sometimes the AI describes the “what” perfectly but misses the “why” behind a specific design choice. Add that context yourself and you’ve got properly documented code in a fraction of the time.
What It Offers
- JSDoc/docstring comments for function-level documentation that tools like TypeDoc and Sphinx can parse
- Inline comments that explain complex logic line by line
- Block comments for section-level explanations
- Works across JavaScript, Python, TypeScript, Java, C++, Go, Rust, Ruby, PHP, and more
- Your code comes back identical except for the added comments
Walking Through the Process
- Paste your code into the input area
- Select the programming language
- Choose JSDoc/docstring, inline, or block style
- Hit “Add Comments”
Paste an uncommented JavaScript function that sorts objects by date. You’ll get back the same function with a JSDoc block describing its purpose, parameters, and return value, plus inline comments explaining the comparison logic. Quick and painless.
The Case for Commenting (Even When You Don’t Want To)
Comments aren’t just for other people. They’re for future-you, who won’t remember why you wrote that recursive helper at midnight. They’re for the teammate who needs to modify your code while you’re on vacation. They’re for the new hire who’s trying to ramp up without asking you to explain every file.
Function-level comments also double as API documentation when you’re using tools like JSDoc or Python docstrings. One pass through this generator can give your internal tooling actual documentation pages.
Practical Scenarios
- Before code review — add comments so reviewers understand your intent without guessing
- Legacy code rescue — retroactively document that ancient module everyone’s afraid to touch
- Tutorials and teaching materials need clear comments, and this beats writing them from scratch
- Open-source contributions — submit well-documented code and your PR is more likely to get merged
- Side projects you’ll revisit in six months desperately need this
If you want to understand code without modifying it, the Code Explainer provides plain-English breakdowns. For project-level docs, the README Generator builds out full README files.
Quick Answers
Does it change my code at all?
No. It only inserts comments. Logic, variable names, structure — everything stays exactly as you wrote it.
Which comment style should I pick?
JSDoc/docstring for function-level documentation that integrates with doc generation tools. Inline for complex algorithm explanations. Block for section-level overviews. Use whichever fits your team’s conventions.
Can it handle any language?
All the major ones, yes. JavaScript, TypeScript, Python, Java, C, C++, Go, Rust, Ruby, PHP — if it’s a mainstream language, it’ll work.
What does it cost?
Nothing. No sign-up, no usage limits.