Code Explainer
When you look at code that a friend has written, and it's all gibberish? That's most of the code I've seen that I hadn't seen for six months.
I've had the pleasure of reading explanations that make no sense and threads on Stack Overflow that make it worse. That's why I was doubtful when a friend showed me UtilityGenAI's Code Explainer some time ago. Another AI tool that explains that there's a for-loop. Cool.
I was wrong this time.
What Does It Actually Do?
You provide a line of code, it explains what that line does - and why - line by line. Not "this is a variable", but "this variable keeps track of this, this variable is used here, here and here later on".
It's free on UtilityGenAI. Free, no account. Just paste your code and get an explanation. And it works in multiple languages without you having to specify.
My Experience - Two Tests
📝 The Prompt
I saw a Python list comprehension online I didn't understand. Specifically: result = [x**2 for x in range(10) if x % 2 == 0] I dropped it in. The tool didn't say 'creates a list.' It explained it: from range(10), only include even numbers, square them, put them in a list. With examples. In a matter of seconds, I got it. It's the sort of explanation I would have spent a full 20 minutes looking for.
📝 The Prompt
A JavaScript async function from a web site. const fetchData = async () => { const res = await fetch(url); return res.json(); } It was the async/await explanation that really impressed me. I didn't see it just say "waits for the data" but that it pauses the function, and allows other things to happen, and then continues. That's an important detail, and it captured it.
Pros and Cons
Pros
- ✓Manages complex logic. Even complex, nested code is made manageable.
- ✓Quick. Seconds, not minutes. It's quicker than reading documentation or asking a question on a forum.
- ✓Language-agnostic. You don't have to say Python or JS or anything. It figures it out.
Cons
- ✓Sometimes explains too much in short snippets. Five paragraphs is too much for a three-line function.
- ✓Overlooks certain libraries. If you've imported something obscure, don't expect that the library will get described in great detail: you might get a quick mention at best.
Who's It For?
Anyone learning to code. Full stop. That is a wide range: obviously novices, but also experienced devs working on code in a language that they're not familiar with.
Where I wouldn't use it: anything very long and complicated, or systems code, or anything proprietary. I don't want to paste proprietary code into any other tool, good or not. But for small, one-off code? It's excellent.
Final Score and Verdict
It's a good time-saver for the 'what the heck' code. I'm withholding two points for the occasional over-simplification and the singular occasion where I'm not getting clear answers for specialised libraries.
No, really, don't Google your code. Just paste it here first. You'll get your answer in less than 60 seconds.
✦ Editor's Verdict