Free client-side tool
System Prompt Hardening Linter
Paste a system prompt and get client-side defensive findings about secrets, brittle prompt rules, privilege separation, and output validation.
Updated 2026-07-06
What the linter checks
The linter looks for common prompt-hardening gaps: secrets or credentials in prompt text, reliance on hidden instructions, missing separation between trusted user intent and untrusted retrieved content, missing tool-call validation, missing output schema guidance, and missing escalation for high-impact actions.
These checks are intentionally conservative. A clean lint result does not make a prompt secure. It means the prompt includes several helpful pieces of operational guidance. The security boundary still belongs in the surrounding application.
System prompt linter FAQ
Does this linter upload my system prompt?
No. The linter runs in the browser with local JavaScript. It does not send prompt text to Rogue Prompt, Cloudflare, or any model provider.
Can a strong system prompt prevent prompt injection?
A strong prompt can clarify behavior, but it is not a security boundary. Use application controls for authorization, retrieval, tool calls, and high-impact outputs.
Should a system prompt contain secrets?
No. Treat system prompts as operational guidance that may be exposed. Store secrets in proper secret management and enforce policy outside the model.