Is the AI code explainer free?

Yes — 100% free, no signup, no usage limits.

Does it save my data?

No. Inputs are processed in your browser and never uploaded to a server.

Can I use it on mobile?

Yes. The interface is fully responsive and works on iOS and Android.

It calls out obvious bugs, security issues, and unusual side effects in a 'Heads up' section, but always do your own review for production code.

WebGenAI

AI Code Explainer — Plain-English Walkthroughs

Paste any code in any language. Pick a depth (summary, line-by-line, beginner-friendly). Get a clear explanation streamed back. BYOK OpenAI.

OpenAI API Key

Your key is stored only in your browser (localStorage) and sent directly to the provider. We have no backend, so it never touches our servers. Get an OpenAI API key.

How to use

Step 1: Paste an OpenAI API key
Step 2: Paste your code
Step 3: Pick depth (summary, line-by-line, beginner)
Step 4: Click Explain code

When to use which depth

Use Summary when you need to know what a function does before reviewing it. Use Line by line when something is misbehaving and you suspect a single line. Use Beginner-friendly when you're learning a new language or reading code in one you don't know.

Frequently asked questions

A tool that takes a code snippet and produces a plain-English explanation at the depth you choose.