💻 ChatGPT Prompts for Coding
Copy-and-paste ChatGPT & Claude prompts you can use right now — or customize one in seconds with the free generator.
Customize a prompt →AI coding output is only as good as the constraints you give it. These prompts specify language, behavior to preserve, and exactly what to return.
Paste your code where indicated and adjust the stack.
Example prompts
Debug with reasoning · ChatGPT & Claude
You are a senior [language] engineer. Here is a function that throws [error]. First explain the likely root cause step by step, then provide the corrected code, then list how to prevent this class of bug. Code: [paste code]
Safe refactor · ChatGPT & Claude
Refactor the following code for readability and performance WITHOUT changing behavior or public API. Extract helpers, remove duplication, add brief comments only where intent isn't obvious. Return the full updated file. Code: [paste code]
Code review · ChatGPT & Claude
Act as a strict code reviewer. Review the code below for bugs, edge cases, security issues and readability. List findings by severity with a short fix for each. Don't rewrite the whole file. Code: [paste code]
Write tests · ChatGPT & Claude
You are a test engineer. Write thorough unit tests for the function below using [framework]. Cover happy paths, edge cases and error handling. Explain what each test verifies. Code: [paste code]
Explain code · ChatGPT & Claude
Explain the following code to a junior developer. Describe what it does overall, then walk through the key parts, and call out any non-obvious logic or gotchas. Code: [paste code]
Convert/port · ChatGPT & Claude
Convert the following [source language] code to [target language], keeping behavior identical and following idiomatic conventions of the target language. Note any differences I should watch for. Code: [paste code]
Tips for better results
- State the language, framework and what must NOT change.
- Ask for step-by-step reasoning before the fix to improve accuracy.
- Request the full file to avoid copy-paste errors.
- For reviews, tell it not to rewrite — just report findings.
Frequently asked questions
ChatGPT or Claude for code?
Both are strong; the prompt structure matters more than the model. Use whichever you prefer and keep the constraints explicit.
Is this prompt generator free?
Yes. It's completely free with no sign-up, no credit card, and no usage limits. Generate as many prompts as you want.
Do I need any prompt-engineering experience?
No. You describe your idea in plain language and the generator handles the structure, frameworks, and detail for you.