Prompt Formatter
Format prompts for Claude, ChatGPT, and Gemini API formats
About Prompt Formatter
Prompt Formatter lets you format prompts for claude, chatgpt, and gemini api formats.
Category: AI Tools.
Frequently asked questions
What models are supported?
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Claude (Anthropic), GPT-4 / ChatGPT (OpenAI), Gemini (Google), and Llama (Meta). Each model uses a different prompt structure and role naming conventions.
What is a system prompt?
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Instructions given to the model before the conversation begins. Used to define the assistant's persona, output format, constraints, or domain knowledge.
What's the difference between user and assistant turns?
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User turns represent human input; assistant turns represent prior model responses. You can pre-fill the last assistant turn to steer the next completion toward a specific format or starting point.
Why does the output format vary by model?
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Different APIs expect different schemas. Claude uses a messages array with a system field. OpenAI uses messages with 'system'/'user'/'assistant' roles. Llama uses special control tokens. Gemini uses 'contents' with 'parts'.