Code Explainer
Understand any code snippet in plain English with free AI — an overview, a step-by-step walkthrough, and bug or improvement notes. Any language.
Thinking…
Understand any code snippet in plain English. Paste a function or block in any language and the AI explains what it does overall, walks through the key parts step by step, and flags any bugs or improvements worth noting.
How to use Code Explainer
- Paste the code you want explained (any language).
- Click "Explain code" to get a plain-English breakdown.
- Read the overview and step-by-step walkthrough, and note any suggested fixes.
Frequently asked questions
Which languages does it support?
Most common languages — JavaScript, Python, PHP, Java, C/C++, Go, Ruby, SQL, and more. Paste the snippet and it will detect the language.
Does it point out bugs?
Yes. Alongside the explanation it notes any bugs or improvements worth considering, so it doubles as a quick review.
Can it add comments to my code?
Yes. Ask it to comment the code and it will return your snippet with clear inline comments.
Is my code kept private?
Your code is sent securely only to generate the explanation and is not stored on our servers afterward.