Code Review Assistant
Get a thorough AI code review with critical issues, improvements, and refactored snippets.
This is an AI tool. The text you enter is sent to our AI service to generate your result. Our own server doesn't store it or use it for training; if it's down, a backup AI provider may handle it. How we handle your input
How to Use Code Review Assistant
- 1Pick the language — JavaScript, TypeScript, Python, Java, C#, C++, Go, Rust, PHP, Ruby, Swift or Kotlin.
- 2Choose a focus area: General Review, Security, Performance, Readability & Style, Bugs & Edge Cases, or SOLID & Design Patterns. A focused pass finds more than a general one.
- 3Paste the code. A single function or class gets a far better review than a whole file.
- 4Click 'Review Code'.
- 5Each finding comes with the issue, why it matters and a suggested fix. Verify each one against your codebase before acting — a reviewer that has only seen this snippet cannot know your conventions or your callers.
Frequently Asked Questions
Should I use a focus area or a general review?
A focus area, usually. A general review spreads thin and surfaces style nits alongside real bugs. Running 'Bugs & Edge Cases' and then 'Security' as two passes on the same code finds more than one general pass, because each prompt keeps the model looking for one class of problem.
Will it find real security vulnerabilities?
It reliably flags the obvious ones — unparameterised queries, missing input validation, secrets in source, unsafe deserialisation. It is not a substitute for a security review or a SAST tool, and it cannot see how the function is called, which is where most real vulnerabilities actually live.
Why does it sometimes flag things that are fine?
Because it sees only the snippet. It does not know that validation happens in the caller, that the value is already sanitised, or that your team deliberately does something a particular way. Treat findings as questions to check, not defects to fix.
How much code should I paste at once?
One function or one class. Paste a whole file and the review becomes a list of generalities; paste one focused unit and you get specific, actionable findings about it.
Is it safe to paste proprietary code?
Your code is sent over HTTPS to our own AI server, used once to produce the review, and never stored or used to train any model. That said, check your employer's policy on third-party AI tools before pasting proprietary source, and never paste anything containing credentials, keys or connection strings. If our server is down, a backup AI provider may handle the request under its own data policy.
About Code Review Assistant
The Code Review Assistant reviews a pasted function or class in one of twelve languages, with a focus area that steers what it looks for: security, performance, readability, edge cases, or design. Each finding comes with the reasoning and a suggested fix rather than a bare warning.
Running two focused passes beats one general pass. The focus area works by keeping the model hunting one class of problem, and a 'Bugs & Edge Cases' pass followed by a 'Security' pass on the same function consistently surfaces more than a single general review, which tends to drift into style commentary.
The fundamental limitation is context. It sees your snippet and nothing else — not the callers, not the validation happening upstream, not your team's conventions. That produces false positives, and it also means the vulnerabilities that live in how components fit together are invisible to it. Findings are questions worth checking, not a defect list.
Keep credentials, keys and connection strings out of anything you paste, and check your employer's policy on third-party AI tools before pasting proprietary source. Your code is sent to our own AI server over HTTPS, used once, and never stored or used for training. If our server is down, a backup AI provider may handle the request under its own data policy.