FREE FIELD TOOL

Every brand on Claude sounds the same. Yours doesn't have to.

Generate a Brand Voice Document. Paste it into a Claude Project, a ChatGPT Custom GPT, or any system prompt. Every output from that point on reads like you wrote it.

No account required. Takes 3 minutes.

Brand Voice Document Generator

Three fields. Get a Brand Voice Document you can paste into Claude Projects, ChatGPT Custom GPTs, or any system prompt - and every output from that moment on reads like you wrote it.

What's your brand or product called? *

In one sentence, what do you do and who do you do it for? *

Voice fingerprint * Paste 3-5 sentences of your real copy. A blog intro, an email, an About page, anything you've actually shipped. The tool studies these to ground the voice doc in your real patterns. If you don't have any, describe your voice in 3-5 words instead.

Your email * Free. We'll email you the results. Occasional notes when something genuinely changes. No spam. Unsubscribe in one click.

Free. We'll email you the results.

Writing your brand voice document...

Your brand voice document

Below is your Brand Voice Document. Copy it and paste it into the system prompt of whatever AI you use - Claude Project Instructions, a ChatGPT Custom GPT, or the system prompt of any other model. Every output from that point on reads in this voice.

How to use this document

Copy the whole document above.
Open a Claude Project, a ChatGPT Custom GPT, or any system prompt field.
Paste it into "Project Instructions" / "Custom Instructions" / the system prompt.
Every output from that project, custom GPT, or chat is now voice-aligned.

You have the voice. Now run a campaign on it.

The Brand Voice Document gives the model rails.

The guide teaches the workflow that runs on those rails - how to brief Claude on a campaign once, build a prompt library that compounds, and never re-explain your business every Monday morning again.

Recommended Guide

Get the guide →

What you get — sample for an indie SaaS

# Brand Voice Document - Loop Notebook

## Brand identity
Loop Notebook is a daily journal app for people who think in writing. We do not believe in streaks, badges, or AI summaries. The user writes. We get out of the way.

## Voice and tone
Quiet. Confident. A little dry. Never enthusiastic about ourselves.
You speak like a thoughtful product designer talking to a friend, not like a startup announcing a feature.

## Sentence patterns
Short sentences. One idea each. Then a slightly longer one to vary the rhythm.
Start sentences with the subject. Avoid throat-clearing openers.

## Words we never use
delve, intricate, leverage, unlock, supercharge, transform, revolutionary,
seamless, robust, empower, journey, ecosystem.
Never use the em-dash character. Use a hyphen with spaces ( - ) or a period.

## Example outputs we want
Loop saves what you wrote. That is the whole product.
No streaks. No badges. No nudges. We trust you to come back.

Sample output. Your document will be specific to your brand and your voice.

AI-generated portrait. Pen name. Real work.

Mark Reeves — author of all 47 guides

The same person who writes the guides built the tools, runs the support inbox, and ships the updates. Operator, not observer.