Line-by-Line Code & Algorithm Explainer
Paste a function, algorithm, or regex you don't want to puzzle out by hand, and get a line-by-line walkthrough.
Quick Reference & Instructions
Simple steps, pro tips, and execution details
Provide Inputs
Type, paste, or select your values in the form fields below.
Instant Live Analysis
Calculations and formatting happen automatically with zero delay as you type.
Copy or Use Output
Copy results or apply the clean output directly to your projects.
How It Works
Walks through your code line by line, explaining the logic, state changes, and — where it matters — the Big-O complexity.
Frequently Asked Questions
Common questions about calculations, assumptions, and edge cases.
It can explain code in any mainstream language you paste -- JavaScript, Python, Java, C++, and others -- since the explanation is generated from the code's logic rather than a fixed per-language parser.
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