SQL Injection Code Checker
Find SQL built with string concatenation, interpolation or format() in Java, C#, Python, JavaScript, PHP and more. Free and private: runs in your browser.
Paste data-access code to find queries that mix user input into SQL text, with the parameterised fix for each.
Runs entirely in your browser. Code, keys and tokens are never uploaded, logged or stored.
Use cases
- Spot-check a snippet during code review.
- Teach a team what the risky pattern looks like.
- Double-check a fix before you push it.
Frequently asked questions
How do I prevent SQL injection?
Use parameterised queries or an ORM for every value (WHERE id = @id, ?, %s with a params tuple). For identifiers like ORDER BY columns, use an allow-list.
Is the SQL Injection Code Checker free?
Yes. It is free with no sign-up, and it runs entirely in your browser, so your input is never uploaded or stored.
Does a clean result mean my code is secure?
No. It means none of the common patterns this tool looks for were found in the snippet. Combine it with code review, dependency scanning and a full repository scan.
Related tools
Catch secrets, injection and unsafe code in every pull request with CodeInspector.