AI Code Explainer

Reading your input…

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About this tool

Understand unfamiliar code — overview, line by line, or pitched at a beginner, with real risks flagged.

Reading code you did not write is most of the job, and the hardest part is not syntax. It is working out the intent behind a function that has been patched by four people over three years.

Paste a snippet and choose your depth: a one-paragraph overview to orient yourself, line by line for something genuinely dense, or a beginner explanation that defines the language features as it goes. Anything actually risky gets flagged — an unhandled error path, an injection point, an off-by-one — but it does not pad the output with style opinions your linter already covers. Where the snippet depends on context you have not pasted, it says what is missing rather than inventing a plausible-sounding explanation of code it cannot see.

How to use

  1. Paste the code, optionally name the language, and choose how deep an explanation you need
  2. Press Generate and give it a few seconds.
  3. Copy what you need, or generate again for a different take — every run is fresh.

Frequently asked questions

No, it infers it reliably from syntax. Naming it helps for short snippets where several languages would be valid, or for a dialect like TypeScript versus plain JavaScript.

It flags obvious risks it can see in the snippet — unsanitised input, unhandled errors, unsafe defaults. It is not a security audit, and it cannot reason about code paths you have not pasted.

Your code is sent to the AI provider to generate the explanation and is not stored here. Do not paste code containing credentials, keys or anything under an NDA.

No. Your input is sent to the AI provider this site is configured to use purely to generate your result, and is not stored here afterwards. There is no account for it to be attached to. Even so, keep passwords, financial details and other people's private information out of it.

The site owner selects one model that powers every tool here, so there is nothing for you to configure. Describe what you need, press Generate, and read the result before you use it.