How is this different from a normal prompt?

A system prompt defines persistent behavior and safety boundaries before user messages. User prompts then carry task-specific details. Strong results usually come from both layers working together.

Can I use this for ChatGPT and Claude?

Yes. The generated structure is intentionally model-agnostic. You can adapt it to OpenAI, Anthropic, and similar chat APIs by mapping field names in your client code.

Should I always force strict JSON?

Enforce strict JSON only when outputs are machine-parsed in downstream automation. If readability is primary, a constrained plain-text format is often more practical.

AI Tools

System Prompt Builder

System prompt generator and ChatGPT system prompt builder for role, output format, and constraint selections.

Calculate

Task / GoaliMain objective you want the model to follow.

RoleiBehavioral persona for model responses.

Output FormatiFormat the model should return to users.

Constraint ProfileiStrictness level for reliability and safety.

Response LanguageiLanguage policy for generated responses.

Generated Prompt OutputiChoose plain text or JSON wrapper for generated system prompt.

Result

Estimated TokensCopy

CharactersCopy

241

RoleCopy

general_assistant

Output FormatCopy

json

Prompt OutputiCurrent format of generated system prompt.Copy

text

Generated System Prompt

You are a precise AI assistant focused on actionable outputs.
Primary objective: Complete the user request accurately.
Respond in the user's language.
Return ONLY valid JSON.
Do not invent facts.
Ask for missing critical input when required.

Raw JSON (technical)

{
  "role": "general_assistant",
  "outputFormat": "json",
  "constraintProfile": "balanced",
  "language": "auto",
  "promptOutputType": "text",
  "task": "Complete the user request accurately.",
  "systemPrompt": "You are a precise AI assistant focused on actionable outputs.\nPrimary objective: Complete the user request accurately.\nRespond in the user's language.\nReturn ONLY valid JSON.\nDo not invent facts.\nAsk for missing critical input when required.",
  "chars": 241,
  "estimatedTokens": 60,
  "sections": {
    "role": "You are a precise AI assistant focused on actionable outputs.",
    "objective": "Complete the user request accurately.",
    "format": "Return ONLY valid JSON.",
    "constraints": [
      "Do not invent facts.",
      "Ask for missing critical input when required."
    ]
  }
}

How to use this tool?

Step 1

Fill in required fields and define your scenario clearly.

Step 2

Review result cards and compare key metrics.

Step 3

Copy relevant output and continue with the next tool if needed.

FAQ

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