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CLAUDE.md Generator
Few-Shot Example Set Builder
MCP Config Wizard
System Prompt Generator
Prompt Optimizer
RAG Chunking & Retrieval Planner
ReAct Prompt Converter
Skill File Generator
Structured Output Schema Builder
Subagent & Slash Command Generator
Tool / Function Schema Generator
Workflow to Agent Blueprint
Free tool
System Prompt Generator
Turn a description of what an AI feature should do into a structured, cacheable, production-ready system prompt.
Get started-
Splits the prompt into a cacheable static prefix and a short dynamic suffix, and shows you exactly where the boundary falls.
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Your hard rules are reproduced verbatim in a prominent section — never softened, reworded, or dropped.
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Scored against the same five criteria the Prompt Auditor checks for, with a one-click handoff into it.
Frequently asked questions
This tool is powered by Claude (Anthropic).
No. Describe what your AI feature should do, generate the prompt, and copy or download it. An email address is required to generate the prompt and enforce a fair-use daily limit; no account is created.
This tool writes a new system prompt from a description of what you want it to do. The Prompt Auditor scores a system prompt you already have. Generate one here, then use the "Audit this prompt" button to send it straight into the Auditor.
Anthropic can reuse a previously-sent system prompt instead of reprocessing it, billing the reused (cached) portion at a lower rate — but only the part of the prompt that stays byte-identical across calls. This tool places everything that never changes (role, rules, examples) before everything that does (your per-request input), and shows you exactly where that line falls.