AI Code Explainer

Gemini

Paste any snippet and get a clear, senior-engineer-style walkthrough — purpose, step-by-step logic, complexity, and edge cases.

Input

Try:

Code to explain0 / 20,000

Explanation

Paste your input on the left and hit Generate

Examples

Debounce

function debounce(fn, wait) {
  let t;
  return (...args) => {
    clearTimeout(t);
    t = setTimeout(() => fn(...args), wait);
  };
}

Recursion

const factorial = n => n <= 1 ? 1 : n * factorial(n - 1)

About this tool

Paste any snippet and get a clear, senior-engineer-style walkthrough — purpose, step-by-step logic, complexity, and edge cases.

Every request is sent server-side to the Gemini 2.5 Flash model with a task-specific system prompt tuned for code work. Your input is not persisted on our servers — we only keep an anonymised metric (task, input length, latency) so we can improve the tool.

Combine this with our other AI developer tools and privacy-first developer utilities to move faster in your day-to-day work.

FAQ

What kind of explanations does the AI produce?▾

A senior-engineer style walkthrough with a high-level summary, block-by-block breakdown, complexity analysis where relevant, and callouts for edge cases and gotchas.

Can it explain algorithms and data structures?▾

Yes. Paste the algorithm and the explanation will include time/space complexity plus intuition behind the approach.

Does it work for legacy code?▾

It works well for legacy code in older syntax variants — but very obfuscated or minified code may need to be beautified first for best results.

Can I ask follow-up questions?▾

Include your specific question in a comment at the top of the code and the explanation will focus on that part.