Free Online Tool
Prompt Injection Guard
Enter your prompt, click Process Text, and get a hardened version ready for AI chat apps.
AI Result
How to Guard a Prompt
Enter your prompt
Paste the full prompt you plan to use with an AI model.
Click Process Text
The tool adds input-safety and instruction-isolation protections.
Copy and use
Paste the hardened prompt into your AI chat application.
Built for Prompt Security
Instruction isolation
Prevents model behavior from being hijacked by instructions inside user content.
Untrusted input handling
Treats user text, links, files, and retrieved context as data, not commands.
Override resistance
Blocks attempts to change role, scope, and core constraints.
Secret protection
Adds safeguards against revealing hidden rules, credentials, and private policies.
About Prompt Injection Guard
Prompt Injection Guard overview
Prompt Injection Guard helps secure AI prompts by adding instruction-isolation and input-safety rules. It is built for teams and individuals who use prompts in support, automation, retrieval, and analysis workflows.
How it works
Paste your existing prompt into the input field and click Process Text. The tool returns a hardened version that keeps your original goal but adds clear security boundaries, including untrusted-input handling and priority-based conflict behavior.
Why prompt hardening matters
Prompt injection can happen when a model receives malicious instructions inside user messages, files, links, or retrieved documents. A hardened prompt reduces the chance that these instructions override your intended behavior.
Common use cases
- Support assistants that process user text
- Retrieval workflows with external context
- Structured extraction prompts for documents
- Internal AI tools that handle mixed-trust data
Output behavior
The output preserves your original task and format requirements, then adds security rules to isolate instructions and protect sensitive information. You can copy the result directly into your AI chat workflow.
Tips for best results
- Paste the full prompt, not a partial snippet.
- Keep existing format constraints in the input.
- Re-run hardening after major prompt changes.
- Validate behavior with benign and adversarial test inputs.
Use the result
After processing, copy the hardened prompt and use it in your AI app. This gives you a stronger baseline against prompt injection without redesigning your entire prompt from scratch.
FAQ
Frequently Asked Questions
Common questions about Prompt Injection Guard
- It rewrites your prompt with security-focused rules that reduce prompt injection risk while keeping your original task intact.
- No. It preserves your role, task, and output requirements, then adds protective instruction boundaries.
- Yes. It adds rules to treat retrieved text, file content, links, and tool output as untrusted input.
- No. It complements model safety by improving your prompt-level defenses.
- Yes. It is a good baseline hardening step for support, automation, and retrieval workflows.
- Copy the secured prompt and paste it into your AI chat app or prompt workflow.
Related Tools
Few-Shot Example Builder
Append high-quality few-shot examples to an existing prompt based on its role, task, and instructions.
Strengthen Prompt
Remove filler words, weak phrasing, and vague instructions to make prompts direct, specific, and actionable.
Improve Prompt
Generate a ChatGPT prompt based on a topic, starting with 'I want you to act as', and expand the prompt to make it useful.
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