OpenAI API Request Builder
Build a chat API request for OpenAI, Claude, Gemini, Groq or Ollama in cURL, Python, JS or PHP.
Create a persona for a chatbot or roleplay character, as a prompt or a character card.
The AI Persona Generator builds a consistent character for a chatbot or roleplay — role, background, personality, voice, knowledge, boundaries, first message and example lines — and exports it as a system prompt, a markdown sheet or Character Card V2 JSON.
A persona is what turns a general-purpose model into a specific character: a support assistant with a name and a calm manner, a language tutor who corrects one mistake at a time, a tavern keeper in a tabletop campaign, a hiring manager for interview practice.
The generator collects the parts that make a persona hold together — a role, a background that explains how it thinks, a few personality traits, a speaking style, what it knows and what it does not, hard boundaries, a first message, and example lines. Example lines matter most: a model reproduces a voice it is shown far more faithfully than one it is described.
Export the result as a system prompt for any chatbot or API, as a readable markdown persona sheet for your team, or as Character Card V2 JSON — the community format that SillyTavern, RisuAI and most character front-ends import directly, with {{user}} and {{char}} placeholders in the example dialogue.
Download JSON that SillyTavern, RisuAI and other front-ends import directly.
Dialogue examples are converted to {{user}} and {{char}} placeholders for character cards.
Hard limits on what the persona knows and does stop it drifting over long chats.
Plain, teacher, formal, casual, in-character or terse, each with tested wording.
Too many traits, no example lines or a character with unlimited knowledge are flagged.
Start with a preset, or give it a name and the role it plays.
A few sentences of history and a speaking style shape every answer.
What it never does or never knows. This keeps a character consistent over long chats.
Copy it as a system prompt, or download the Character Card V2 JSON to import it.
A community JSON format for AI characters, with fields for description, personality, scenario, first message and example messages. SillyTavern, RisuAI and many other front-ends import it directly.
Three to five. Long lists of traits average out into a bland character; a few strong ones that change how answers are written work better.
Because the model copies a voice it is shown much more reliably than one described in adjectives. Two or three short exchanges are usually enough.
Add boundaries for what it does not know — a medieval innkeeper does not know about smartphones — and include "never breaks character" as a rule.
No. The persona is assembled in your browser and nothing leaves your device.
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