Paste a SQL query, login form value or URL parameter and check it for classic SQL injection patterns. Runs entirely in your browser.
SQL injection is consistently ranked in the OWASP Top 10 because a single unescaped quote can turn a benign query into a data breach. This checker looks for the textbook patterns — UNION-based (UNION SELECT), boolean-based (OR 1=1), error-based (single quotes, double quotes), time-based blind (sleep(), pg_sleep(), benchmark()) and stacked queries (; DROP TABLE). The best fix is always parameterized queries / prepared statements — never build SQL by string concatenation with user input.