UtilHub

Prompt Injection Tester

Check your system prompt for vulnerabilities to prompt injection, jailbreak attempts, and instruction override attacks. Get an A–F security score with specific mitigation suggestions.

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Frequently Asked Questions

What is prompt injection?

Prompt injection is an attack where a malicious user crafts input that overrides your system prompt instructions, causing the AI to behave in unintended ways — like revealing confidential information, changing its role, or ignoring safety guidelines.

How can I protect against jailbreaking?

Defense-in-depth strategies include: (1) Define a specific, narrow role. (2) Explicitly instruct the model to refuse override attempts. (3) Add scope limits on what topics it can discuss. (4) Use 'meta-prompting' to tell the model to be suspicious of manipulation attempts. (5) Test with adversarial inputs regularly.

Does this tool catch all vulnerabilities?

No. This tool uses static pattern matching and heuristics to identify common omissions. Real security testing requires adversarial prompt testing with tools like Promptfoo, garak, or manual red-teaming. This is a starting point, not a comprehensive security audit.