Does this replace proper input validation?

No. This tool detects common patterns for educational and testing purposes. Proper SQL injection prevention requires parameterised queries or prepared statements in your application code — never rely on pattern matching alone.

What injection patterns are detected?

UNION-based, boolean blind, time-based blind, stacked queries, comment-based bypasses (-- and #), and common payload patterns like 1=1, OR 1=1, and SLEEP().

Can I test my WAF rules with this?

Yes. Use the detected patterns to construct test payloads and verify your WAF or application-level input sanitisation blocks them correctly.

Best Free SQL Injection Detector

SQL injection remains one of the most prevalent and dangerous web security vulnerabilities, consistently appearing in the OWASP Top 10. devtoolkit.sh's SQL Injection Checker scans input strings for common SQL injection patterns — including UNION-based attacks, boolean blind injection, time-based blind injection, and comment-based bypass techniques — helping developers identify potentially malicious input during testing and code review. This is a static analysis tool for educational and testing purposes: paste a string to check whether it contains patterns commonly associated with SQL injection attempts. Use this during security reviews, pen testing, and when evaluating WAF rule effectiveness.

sql query / user input

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Educational tool only. The only real defence is parameterised queries / prepared statements.

FAQ

Does this replace proper input validation?: No. This tool detects common patterns for educational and testing purposes. Proper SQL injection prevention requires parameterised queries or prepared statements in your application code — never rely on pattern matching alone.
What injection patterns are detected?: UNION-based, boolean blind, time-based blind, stacked queries, comment-based bypasses (-- and #), and common payload patterns like 1=1, OR 1=1, and SLEEP().
Can I test my WAF rules with this?: Yes. Use the detected patterns to construct test payloads and verify your WAF or application-level input sanitisation blocks them correctly.