SQL Injection Tester

What is SQL Injection?

SQL injection is a security vulnerability that allows attackers to manipulate SQL queries by injecting malicious SQL code. This occurs when user input is directly concatenated into SQL queries without proper validation or parameterization. SQL injection can lead to unauthorized data access, data modification, or database compromise.

Our free SQL Injection Tester checks input for common SQL injection patterns. It detects SQL keywords, special characters, and potentially dangerous patterns. Note that this is a basic client-side check. Comprehensive SQL injection testing requires server-side validation and proper security testing tools.

Common SQL Injection Patterns

• ' OR '1'='1 - Always true condition
• '; DROP TABLE users-- - Table deletion
• ' UNION SELECT NULL-- - Union-based injection
• admin'-- - Comment-based bypass

Prevention

• Parameterized Queries: Use prepared statements
• Input Validation: Validate and sanitize all input
• Least Privilege: Use database accounts with minimal permissions
• Error Handling: Don't expose database errors to users

FAQs

What is SQL injection?

SQL injection is a vulnerability that allows attackers to manipulate SQL queries by injecting malicious SQL code through user input.

How do I prevent SQL injection?

Use parameterized queries (prepared statements), validate and sanitize input, use least privilege database accounts, and avoid string concatenation in SQL queries.

Is SQL injection testing legal?

Only test SQL injection vulnerabilities on systems you own or have explicit permission to test. Unauthorized testing is illegal.

What are parameterized queries?

Parameterized queries (prepared statements) separate SQL code from data, preventing SQL injection by treating user input as data, not code.