AI Prompt Firewall
Scan and block malicious prompt injections before they reach your LLM.
Last reviewed by the Radiatus Cloud team
Detected Risks
What is Prompt Injection?
Prompt injection is a technique used to hijack a language model's output. Attackers use specific phrases to override safety instructions, causing the AI to generate harmful or unauthorized content.
Common Patterns
- "Ignore previous instructions"
- "DAN" (Do Anything Now) mode
- System prompt leakage attempts
- Role-play bypasses
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Screen prompts before they reach your model
A prompt firewall inspects input and blocks malicious prompts before they reach a model. This tool scans and blocks prompt injection attempts, so an application built on an LLM is protected from input designed to subvert it.
Why a firewall on the input matters
Any application that passes user or external input to a model is exposed to prompt injection, where crafted input makes the model ignore its instructions, reveal its system prompt, or act maliciously. A prompt firewall is the defensive layer that inspects input for injection patterns and blocks or flags it before the model sees it. It is not a complete solution on its own, layered defences matter, but it catches a large class of attacks at the door. This is a defensive control for an LLM application you build.
Defend the input
The tool runs entirely in your browser, so nothing you paste, prompts, outputs or documents, is uploaded, which matters when the input is sensitive AI data or your own content.
Related tools
- AI Prompt Leakage Analyzer — Paste a system prompt and a hostile user input to see whether the prompt holds secrets and whether the input carries injection patterns. Local, instant.
- LLM Data Exposure Checker — Check if text contains data likely to be memorized or exposed by LLMs.
- AI Usage Policy Generator — Generate an acceptable use policy for AI tools in your company.
- Model Hallucination Estimator — Estimate risk of hallucinations based on task type and temperature.
Frequently Asked Questions
What does a prompt firewall do?
It inspects input to a model and blocks or flags prompt injection attempts before the model processes them, protecting the application.
What is it defending against?
Prompt injection: crafted input that makes the model ignore its instructions, reveal its system prompt, or behave maliciously.
Is a firewall enough on its own?
No. It catches a large class of attacks at the door, but layered defences, including careful prompt design and output checks, matter too.
Is this for my own application?
Yes. It is a defensive control for an LLM application you build, screening the input it receives.
Is my input uploaded?
No. The scanning runs entirely in your browser.
Privacy & Security
Prompts are analyzed locally in your browser.
About This Tool
This tool runs entirely in your browser. No data is sent to any server, ensuring complete privacy. Simply use the interface above to get started — no registration or login required.
Disclaimer: This tool is provided "as is" without warranty of any kind. Results are for educational and utility purposes.
Related Tools
AI Prompt Leakage Analyzer
AI SecurityPaste a system prompt and a hostile user input to see whether the prompt holds secrets and whether the input carries injection patterns. Local, instant.
LLM Data Exposure Checker
AI SecurityCheck if text contains data likely to be memorized or exposed by LLMs.
AI Usage Policy Generator
AI SecurityGenerate an acceptable use policy for AI tools in your company.