Structured System Prompt Generator

Build structured AI system prompts with Role, Context, Task, Constraints, and Output Format fields.

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核心特性与隐私安全保证

  • ✓ 100% 浏览器本地运行：您的输入数据绝不离开本地设备，不会上传至任何远程服务器。
  • ✓ 实时无延迟输出：零网络等待时间，随打随算，毫秒级快速剪贴板复制。
  • ✓ 永久完全免费无限制：无需注册登录，没有付费门槛，没有每日使用频率限制。
  • ✓ 严格遵循国际标准：基于 RFC、ISO 及 W3C 官方网络协议规范构建。

Build professional AI system prompts for ChatGPT & Claude

Define AI agent personas, provide background context, specify strict rules, and control output formatting for consistent LLM responses.

技术规格与架构设计

Execution Environment:
100% Client-Side Browser Sandbox
Data Privacy:
Zero Server Storage / No Tracking
Processing Speed:
Real-time local CPU execution
Cross-Platform:
Works on Windows, macOS, Linux, iOS & Android

Prompt Engineering & Token Estimation Engine

LLM utilities evaluate prompt lengths, structure system instructions, and calculate approximate token counts based on byte-pair encoding (BPE) algorithms used by OpenAI, Anthropic, and Google models. This helps prevent token budget overflows and optimizes monthly API expenditure.

1

Provide Input

Enter, paste, or upload your data into the input field above.

2

Configure & Process

The tool immediately processes your input in real time according to your chosen settings.

3

Copy or Save

Use the Copy button to copy the output to your clipboard, or download the result to your device.

开发者说明: Counting tokens before calling expensive LLM APIs prevents unexpected bill spikes and truncated model responses.

常见应用场景

  • Create system prompts for developer assistants, coding agents, and content writers
  • Establish strict guardrails and formatting rules for AI API integrations
  • Build instruction sets for Custom GPTs and Claude AI Assistants

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常见问题

What is a system prompt?
A system prompt is an initial instruction set given to an LLM to establish its persona, behavioral boundaries, expertise level, and response format.
Why is structured prompt engineering important?
Structuring prompts with clear Role, Task, Constraints, and Formatting prevents AI hallucinations and ensures predictable, production-ready outputs.
Can I use these prompts for Custom GPTs and Claude Projects?
Yes — the generated Markdown prompts are fully compatible with Custom GPT Instructions, Claude System Prompts, and LangChain/LlamaIndex agents.