AI Prompt Injection Tester

Try a sample:
System Prompt0 words / 0 chars
Security Analysis

Paste a system prompt to analyze

Tests against 58 known injection patterns across 8 categories

Severity Levels

criticalMust fix immediately
highStrongly recommended
mediumGood to have
lowNice to have

What This Tool Does

AI Prompt Injection Tester is built for deterministic developer and agent workflows.

Test system prompts against 50+ known injection attack patterns. Get a vulnerability score, specific weaknesses, and hardening suggestions. Fully client-side.

Use How to Use for execution steps and FAQ for constraints, policies, and edge cases.

Last updated:

This tool is provided as-is for convenience. Output should be verified before use in any production or critical context.

Agent Invocation

Best Path For Builders

Browser workflow

Runs instantly in the browser with private local processing and copy/export-ready output.

Browser Workflow

This tool is optimized for instant in-browser execution with local data handling. Run it here and copy/export the output directly.

/ai-prompt-injection-tester/

For automation planning, fetch the canonical contract at /api/tool/ai-prompt-injection-tester.json.

How to Use AI Prompt Injection Tester

  1. 1

    Paste your system prompt

    Enter your complete system prompt in the input area. Include all instructions, role definitions, and any formatting you use in production.

  2. 2

    Review vulnerability findings

    The scanner tests 50+ attack patterns across 8 categories. Each finding shows the vulnerability name, severity level, and a description of the risk.

  3. 3

    Check the security score

    The overall security score (0-100) rates your prompt's defensive posture. Green (70+) is well-defended, yellow (40-70) needs work, red (below 40) has critical gaps.

  4. 4

    Apply hardening suggestions

    Each finding includes specific text or structural changes to add to your prompt. Click Copy on any suggestion to copy the hardening text directly.

Frequently Asked Questions

What is AI Prompt Injection Tester?
AI Prompt Injection Tester scans system prompts against 50+ known attack patterns across 8 categories — role hijacking, instruction override, delimiter abuse, encoding attacks, context manipulation, data exfiltration, indirect injection, and jailbreaks.
Does this actually run attacks against an LLM?
No. The tool analyzes your system prompt structure using pattern matching to identify vulnerabilities. No LLM API calls are made — it checks for known defensive patterns and structural weaknesses.
Is AI Prompt Injection Tester free?
Yes. Completely free with no account or sign-up required.
Does it send my system prompt to a server?
No. All analysis happens entirely in your browser. Your system prompt never leaves your device — critical for security-sensitive prompts.
How do I interpret the security score?
Scores above 70 indicate good defensive posture, 40-70 means moderate risk with specific areas to address, and below 40 suggests significant vulnerabilities. Each finding includes specific hardening suggestions you can copy directly.