Free tool · ~10 minutes · 4 platforms
Every AI has a settings page.
Most of yours are blank.
ChatGPT, Claude, Gemini, and Perplexity each have a place to tell them who you are and how to answer. This free tool fills all of them — matched to every platform's exact fields. Ten minutes of questions, four paste-ready sheets.
Custom Instructions Generator
Why your AI sounds like everyone else
A blank settings box gets you a generic answer
Every model reads its personalization settings before it answers you. Leave them empty and it writes for the average of everyone who ever typed a prompt like yours — competent, faceless, not quite you.
The reason most people leave them blank is simple: a blank field is hard to fill, and every platform asks for something different. This tool does the filling — you answer once, and it writes native instructions for all four.
One interview, four native sheets
What it fills, platform by platform
- 01
ChatGPT
Custom-instructions and about-you boxes, the base style and tone picker, and the warm, enthusiastic, headers-and-lists, and emoji toggles — each filled and formatted for its 1,500-character limit.
- 02
Claude
Your profile fields, the “what best describes your work” multiselect, and the personal-preferences text that rides along on every conversation.
- 03
Gemini
Personal-context entries — saved-info facts and instructions written as discrete lines, ready to drop in one at a time with the Add + button.
- 04
Perplexity
Occupation, company, the “introduce yourself” bio, plus response length and formatting preferences set to how you actually like to read.
Ten minutes now, sharper AI everywhere.
Free. No account needed to start — just answer a few questions.
Get started freeFrom blank boxes to paste sheets
How it works
Answer a few questions.
Ten minutes on how you work and communicate. Already have context anchors? Drop them in and skip ahead.
RUMO writes your instructions.
One pass generates native instructions for every platform you picked — tuned to each one’s real fields, formats, and character limits.
Copy, paste, done.
Each result is a paste sheet that mirrors the platform’s settings page — field-by-field copy buttons and breadcrumbs show exactly where everything goes.
What you walk away with
A paste sheet that mirrors the settings page.
Not a wall of text you have to sort out. Every field arrives labeled exactly as the platform labels it, in the platform's own order, with a one-click copy and a breadcrumb telling you where it goes.
Dropdowns show the setting to pick. Character counts track the real limits. Gemini's entries come as discrete lines. Copy, follow the breadcrumb, paste — about two minutes per platform.
Frequently asked questions
- What are custom AI instructions?
- Custom instructions are standing directions you save in an AI platform’s settings so every conversation starts already knowing you — who you are, how you like answers formatted, and what to skip. Instead of re-explaining yourself in each chat, you write it once and the platform applies it automatically.
- What should I put in ChatGPT’s custom instructions?
- Three things: who you are (role, work, context), how you want responses (tone, length, format), and your non-negotiables (what to always or never do). ChatGPT gives you about 1,500 characters per box, plus a Base style picker and characteristic toggles — the generator fills all of them for you from your answers.
- Does this work for Claude, Gemini, and Perplexity too?
- Yes. Each platform stores personalization differently — Claude uses profile preferences, Gemini takes individual saved entries on its Personal context page, Perplexity has a “Custom instructions” bio — and the generator produces a matching paste sheet for each one, field by field, in the same order as the platform’s own settings.
- Is the generator free?
- Completely. You answer a short set of questions, drop in any context you already have, and get paste-ready instructions for all four platforms. No account needed — just your name and email before generation.
- Where do I paste the instructions?
- Every field on your results sheet carries a breadcrumb showing the exact path — like Settings → Personalization → Custom instructions in ChatGPT, or Settings & help → Personal context in Gemini. Copy a field, follow its breadcrumb, paste. Two minutes per platform.
Go deeper
Instructions are the start, not the foundation
Custom instructions tell each platform how to behave. Context Anchors give every AI you'll ever use the durable material about who you are — written once, owned by you, portable everywhere. The free Personal Constitution is where that starts.
Build your free Constitution →Keep reading
More on custom instructions
How to Write Custom Instructions for ChatGPT, Claude, and Gemini
What to actually put in each platform’s box — and how to write it once and reuse it everywhere.
Read the post
Custom Instructions Examples & Copy-Paste Templates
A fill-in-the-blank template plus five worked examples — founders, writers, freelancers, developers, marketers.
Read the post
Direction Before Instructions
Why a sharper prompt won’t fix generic answers — and what durable context does instead.
Read the postOne interview, four platforms
Give every AI the same you.
Ten minutes now, and ChatGPT, Claude, Gemini, and Perplexity all start from who you actually are and how you want them to answer.