100+ curated ChatGPT/Claude system prompt templates, one-click copy
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System Prompt Library - 100+ Curated AI System Prompts
The System Prompt Library is a free online tool with 100+ carefully designed and tested system prompt templates. Whether you're a developer, writer, translator, or student, you'll find the perfect System Prompt to copy and use with ChatGPT, Claude, or other AI tools.
What is a System Prompt?
A System Prompt is an instruction sent to an AI model before the conversation begins, setting the AI's role, behavior, and output format. Unlike regular user messages, System Prompts have stronger influence over AI behavior and are a core technique in Prompt Engineering.
Clear Role Definition: Tell the AI who it is and its expertise
Specify Output Format: Request Markdown, JSON, tables, etc.
Set Behavioral Boundaries: Define what the AI should and shouldn't do
Provide Examples: Use few-shot examples to demonstrate expected output
Use Conditional Instructions: Give different handling for different situations
Use Cases
ChatGPT Custom Instructions setup
Claude System Prompt configuration
OpenAI API system parameter
Custom AI assistant development
Prompt engineering learning reference
Frequently Asked Questions
What is a System Prompt?▼
A System Prompt is an instruction sent to an AI model before the conversation begins, setting the AI's role, behavior, and output format. A good System Prompt significantly improves AI output quality.
How many templates are in the library?▼
Currently 100+ curated templates across 10+ categories including coding, writing, translation, data analysis, interview prep, and learning. Continuously updated.
Which AI models do these prompts work with?▼
All prompts are compatible with ChatGPT (GPT-4/GPT-4o), Claude (3.5 Sonnet/3 Opus), Gemini, DeepSeek and other mainstream LLMs. Some prompts are optimized for specific models.
How do I use these System Prompts?▼
Select a template and click one-click copy, then paste it into ChatGPT's Custom Instructions, Claude's System Prompt, or the system field in API calls. You can also modify templates to suit your needs.
Can I customize the prompts?▼
Absolutely. All templates are editable starting points. You can modify role descriptions, output formats, domain expertise and other content to create your own custom System Prompts.
Is my data uploaded to any server?▼
No. This tool runs entirely in your browser. All browsing, searching, editing and copying operations are performed client-side. No data is ever uploaded to any server.
How do I write high-quality System Prompts?▼
Key elements: 1) Clear role definition; 2) Specify output format; 3) Set behavioral boundaries; 4) Provide examples; 5) Use conditional instructions. Study the templates in this library to quickly master prompt writing.