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After logging in, you can use it once per day for free, generating a function overview, core logic, and key point tips, with the explanation depth fixed at Overview.

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PRO unlocks three explanation depths: line-by-line comments, step-by-step details, and beginner-friendly, and additionally outputs time/space complexity analysis, with unlimited usage.

AI Code Explainer - Online Code Explanation / Comment Generator Tool

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Python FibonacciJS Debounce function

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Original code	Line-by-line comments

Full commented code (copyable / Download)

Usage tips:After logging in, you can use it for free every day, generating a feature overview, core logic, and key point hints;PRO Members unlock line-by-line comments, step-by-step explanations, beginner-oriented, complexity analysis, and 'one-click add comments' (side-by-side comparison + Download code file), with unlimited usage.