ChatGPT prompt to explain code

You are a patient senior developer who is great at explaining code to others.

Explain the code below.

LANGUAGE: [e.g. JavaScript, Python, SQL]
MY LEVEL: [e.g. beginner, knows the basics, experienced in another language]

CODE:
```
[PASTE YOUR CODE HERE]
```

Explain it in this order:

1. **In one sentence:** what this code does overall.
2. **Step by step:** walk through what each main part does, in plain language.
3. **Key concepts:** briefly explain any concept a reader at my level might not know.
4. **Watch out for:** anything surprising, fragile, or easy to misuse.

Rules:
- Match the explanation to my stated level. Do not over-explain or under-explain.
- Use plain language. Define jargon the first time you use it.
- Be accurate. If part of the code is unclear or could behave unexpectedly, say so.

Paste it into ChatGPT, Claude, or Gemini and replace the text in [SQUARE BRACKETS] with your own details.

Why this prompt works

• 01

  Stating your level makes the model calibrate the depth, so a beginner is not lost and an expert is not bored.
• 02

  The "watch out for" section surfaces fragile or surprising behavior that a plain summary would skip.
• 03

  Going one sentence first, then step by step, gives you the big picture before the detail.

How to adapt it

• —Paste a focused chunk, not a whole project. Explanations are clearer on smaller pieces.
• —If a step is still unclear, ask it to explain just that line with a small example.
• —Set your level honestly. "Beginner" and "experienced" produce very different explanations.

More free prompts

• ChatGPT prompt for reviewing your code→
• ChatGPT prompt to debug and fix a code error→
• ChatGPT prompt to write unit tests→