Live Demo · Open Source
Prompt Firewall
A guardrail that decides whether text should be allowed, flagged, or blocked before it reaches an LLM — combining injection detection, secret detection, and PII redaction under a policy you control.
100% client-side · a demonstration of middleware guardrails
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Policy
Try a sample
The firewall decision, the rules that triggered it, and a sanitized version of your text will appear here.
How it works
The firewall runs two engines over your text — the prompt-injection scanner and the PII & secrets scanner — then applies your policy: injection or secrets trigger a block, PII is redacted and flagged. This is the same logic a production middleware would run on both inputs and model outputs.