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Stop telling AI to
"write in my voice."
Give it your voice DNA.
Paste 2 writing samples. Get a detailed voice profile you can copy into Claude, ChatGPT, or any AI tool. Takes 5 minutes. Free.
Generate Your Brand VoiceFree. No credit card. Just your email.
What you get in 5 minutes
3 Voice Principles
Auto-generated principles with Do/Don't examples. Clear rules AI can follow so your content sounds like you wrote it on a good day.
Brand Personality Snapshot
3 traits in 'X but not Y' format. 'Competent but not arrogant.' 'Direct but not harsh.' Makes AI understand your personality, not just your words.
VAST Voice Analysis
Your writing analyzed across 4 layers: Vocabulary, Architecture, Stance, and Tempo. Not generic observations. Specific patterns pulled from your actual text.
Categorized Banned Words
Words AI should never use when writing as you, organized by type: too formal, too corporate, too generic, too casual. No more 'leverage' or 'delve.'
Quick Reference Card
A condensed version of your entire profile. Set it once in Claude Cowork or ChatGPT custom instructions. Your AI remembers your voice forever.
4 Export Formats
Copy-paste ready for Claude Cowork, ChatGPT system prompts, SubflowAI, or plain text. One click, instant use.
Sample output preview
Your Brand Voice Profile
1. The Vibe
A caffeinated systems thinker who explains complex automation like a friend sketching on a napkin, swearing occasionally when the tools deserve it.
2. Voice Principles
Principle 1: Show the Receipts
"This workflow saves 5 hours/week on lead follow-up."
"This revolutionary tool transforms your business."
3. Brand Personality
Direct but not harsh - says what needs saying without making it personal
Competent but not arrogant - knows the stuff, skips the flex
+ 5 more sections including Vocabulary, Architecture, Stance, Tempo, and Quick Reference Card
How it works
Enter your email
We send a magic link. Click it, you're in. No password needed.
Paste 2 writing samples
Your best stuff. Newsletter intros, blog posts, social threads. Anything that sounds like you on a good day.
Get your brand voice profile
We extract the patterns hiding in your writing: the words you reach for, the rhythm you don't notice, the stance that makes your audience trust you. 8 sections, ready in minutes.
Export and use immediately
Copy your profile into Claude, ChatGPT, or SubflowAI. Start getting output that actually sounds like you.
Frequently Asked Questions
How do I train Claude to write in my brand voice?
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What is the difference between brand voice and tone of voice?
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Brand voice is your fixed identity: the consistent personality and style you use across everything you publish. Tone of voice is how that identity adapts to context. A LinkedIn post and a sales email can share the same voice but use different tones. For AI writing, you train on your voice (the fixed part), then adjust tone per content type in each prompt.
How does the AI Brand Voice Generator work?
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You paste 2 writing samples and provide your name, niche, and audience. The AI analyzes your text across 4 layers (Vocabulary, Architecture, Stance, and Tempo) using the VAST framework. It generates an 8-section brand voice profile with do/don't examples, banned words, personality traits, and a paste-ready quick reference you can copy into any AI tool.
What should a brand voice profile include for AI writing?
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A complete AI voice profile needs three components: style rules (sentence length, vocabulary level, structural patterns), concrete writing examples the AI can study, and explicit constraints (words you never use, tones to avoid). Generic descriptors like 'friendly' are not specific enough. The most effective profiles include exact phrases to ban alongside 2 or more real writing samples.
How do I set up my brand voice in Claude Cowork?
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Create a folder called 'Claude-Work' with an 'ABOUT ME' subfolder. Save your voice profile as 'my-voice.md' inside it. Open the Claude desktop app, click Cowork, and point it to your Claude-Work folder. Claude reads your voice file automatically before every task. The zip download from this tool includes this file ready to drop in.
How do I set up my brand voice in ChatGPT?
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Go to ChatGPT > Settings > Personalization > Custom Instructions. Paste your Quick Reference into the 'How would you like ChatGPT to respond?' field. ChatGPT will follow your voice patterns in every conversation. For best results, include a couple of short writing examples so ChatGPT has concrete patterns to match.
Is the AI Brand Voice Generator free?
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Yes, completely free. No credit card, no subscription. You enter your email, get a magic link, paste your writing samples, and receive your full brand voice profile in about 5 minutes. We also email you a copy for safekeeping.
How do I keep my AI writing consistent across Claude, ChatGPT, and other tools?
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Build one master voice profile document, then paste the relevant sections into Custom Instructions or system prompts in each tool. The profile is tool-agnostic: the same rules work in Claude Cowork, ChatGPT Custom Instructions, and any AI tool that accepts system prompts. The zip download from this tool includes pre-formatted files for each platform.
Can AI really learn and maintain my writing style?
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AI cannot permanently learn your style, but it can follow detailed instructions about your patterns in every session. When you upload writing samples and add structured voice rules, AI can match your sentence rhythm, vocabulary, and opening patterns well enough to cut editing time by 60-70%. The key is samples plus rules. Samples alone produce inconsistent results. Rules alone produce stiff output.
What is the VAST framework?
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VAST stands for Vocabulary, Architecture, Stance, and Tempo. These are the four layers of any writer's voice. Vocabulary covers word choices and formality. Architecture covers how you structure ideas. Stance covers your relationship with readers and certainty level. Tempo covers sentence rhythm and punctuation habits. The framework was developed by Nick Quick of CoWrite with AI.
What makes this different from just telling AI 'write in my voice'?
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Telling AI to 'write in my voice' gives it nothing to work with. It defaults to generic professional writing. A brand voice profile gives AI 50+ concrete rules: exact words to use and avoid, how you open pieces, your confidence level, your sentence rhythm. It replaces a vague instruction with specific, actionable patterns AI can actually follow.