Custom GPT Instructions Generator

Generate structured instructions for a Custom GPT or AI assistant. Fill in the form — get instructions, behavior rules, conversation starters, and a full config draft ready to paste into your assistant's configuration.

This tool generates starter instructions. Paste the output into your assistant's configuration field and review before publishing. This tool does not create or publish assistants.

Assistant Details

Assistant name

Purpose

Target users

Tone

Capabilities

Should do

Must not do

Knowledge boundaries

Fallback behavior

Output style

Response format

Conversation starters

Safety / privacy rules

One per line

// Fill in assistant name and purpose…

Generated in your browser. Nothing is uploaded.

What makes good assistant instructions?

🎭

Clear role definition

"You are a customer support assistant for a SaaS analytics platform." Anchors the persona for all responses.

🎯

Specific capabilities

List exactly what the assistant helps with. Vague capabilities lead to inconsistent scope.

🚫

Explicit restrictions

"You must not discuss competitors." Define what the assistant should never do.

🔄

Fallback behavior

Define what the assistant says when it cannot help. Prevents confusing refusals.

📤

Output format

"Keep responses under 150 words. Use numbered lists for steps." Prevents over-long or inconsistently formatted responses.

💬

Conversation starters

Give users 3-5 ready-made questions that showcase the assistant's main capabilities.

Privacy: This tool runs in your browser. Your assistant details are never uploaded or stored.

Frequently Asked Questions

Does this tool create a Custom GPT for me?

No. This tool generates the instruction text you paste into your assistant configuration. It does not interact with any AI platform or publish anything. You copy the output and paste it yourself.

What are Custom GPT instructions?

Custom GPT instructions (or system instructions) are the text that defines your AI assistant's persona, capabilities, tone, and behavioral rules. They are set once in the assistant's configuration and apply to every conversation.

What should I include in the instructions?

At minimum: who the assistant is (role), what it helps with (purpose), who it serves (audience), what tone to use, what it should and should not do, and what to say when it cannot help (fallback behavior).

What are conversation starters?

Conversation starters are example prompts shown to users when they open the assistant. They help users understand what the assistant can do and provide ready-to-click starting points.

Is my data uploaded anywhere?

No. This tool runs entirely in your browser. Nothing is sent to any server.

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