# ChatGPT Custom Instructions Generator

> Say what you do, what you use ChatGPT for and how you like answers, and our AI writes your ChatGPT custom instructions, ready to paste into Personalization. Free.

Canonical: https://promptitin.com/free-tools/chatgpt-custom-instructions-generator
Last updated: 2026-11-13

Custom instructions make every ChatGPT chat start out knowing who you are and how you like answers. Tap a few options and our AI writes them for you.

This is an interactive tool. Use it at https://promptitin.com/free-tools/chatgpt-custom-instructions-generator.

## How to use it

1. Say what you do, like “product designer at a small startup”.
2. Tap what you use ChatGPT for, as many as apply.
3. Pick how you like answers.
4. Tap Make my prompt, log in with one click, then paste each part into ChatGPT's Personalization settings.

## Tips

- Mention your level. “I'm new to coding” changes answers more than any other line.
- Name habits you dislike, like long intros or too many bullet points.
- Keep it about you, not one task. Task details belong in the chat itself.
- Revisit them every few months as your work changes.

## FAQ

### Where do I add custom instructions in ChatGPT?

Open ChatGPT, click your profile, then Settings and Personalization. Paste each part into the matching box and save.

### What should I put in custom instructions?

Who you are and what you work on, then how you want answers: length, tone, format and anything to avoid. Short and specific works best.

### Do custom instructions work in every chat?

Yes. Once saved, they apply to new chats until you change or turn them off.

### Is it free?

Yes. A free PromptItIn account writes them, no card needed.

## Related

- [System Prompt Generator](https://promptitin.com/free-tools/system-prompt-generator)
- ["Act As" Role Prompt Generator](https://promptitin.com/free-tools/act-as-prompt-generator)
- [Prompt Grader](https://promptitin.com/free-tools/prompt-grader)