Software Development
Coding
Beginner-Friendly
Code Review
Structured Code Review Feedback
Get thorough, categorized code review feedback on a diff or file.
Universal
Use case
Use before opening a PR, or when reviewing a teammate's change, to get a second pass that catches correctness, security, and readability issues in one structured pass.
Customize
e.g. TypeScript, Python, Go
Preview
Review the following code for a {language} project:
```
{code}
```
Give feedback organized into these categories: Correctness (bugs, edge cases), Security (injection, auth, secrets), Performance, Readability/Maintainability, and Test Coverage. For each issue, cite the relevant line or snippet, explain the concrete failure scenario, and suggest a fix. Do not comment on pure style preferences unless they affect readability. If a category has no issues, say so explicitly rather than inventing minor nitpicks.Usage guidance
Paste a real diff or complete function, not a snippet missing context — the model can't reason about edge cases it can't see.
Example input
Language: TypeScript. Code: [a function handling user input validation]
Example output
Correctness: Line 12 — the email regex allows consecutive dots... Security: Line 24 — user input is interpolated directly into the query string...
Last updated Jan 1, 2026