Make AI sound like you.
Paste a few things you’ve written. Voice DNA learns how you write and turns it into a Voice that ChatGPT, Claude and Gemini can follow.
Create and test for free · No account needed to start
Hi team, I hope this message finds you well. I wanted to let you know that due to a scheduling conflict, Monday’s meeting has been rescheduled to Wednesday. Thank you for your understanding!
Quick one: Monday’s meeting moves to Wednesday, same time. Nothing else changes. Shout if that breaks your week.
How it works
Four steps. One Voice you can take anywhere.
All it needs is two pieces you wrote yourself, about 400 words in total.
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Add your writing
Paste two or three things you wrote: emails, posts, notes. Different kinds of writing give a truer match.
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Tune it
See what Voice DNA picked up. Adjust six simple controls and list the phrases you’d never use.
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Test it
Give it a real task and compare a generic AI draft with one in your voice.
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Save and download
Sign in to keep your Voice and download it for the AI tools you use.
What you get
Leave with files, not a subscription.
Add them to the AI tools you already use, and every draft starts in your voice.
- .md
Your Voice, portable
For AI tools that accept skills or custom instructions.
- .txt
Ready-made prompts
For ChatGPT, Claude, Gemini, Codex and Replit.
- .json
Voice settings
Every setting, for developers and your own systems.
Free to create and test. Downloads unlock with a one-time payment for each Voice. Your original samples are never included.
Privacy
Your writing stays yours.
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Stays in your browser
Before you sign in, your draft lives only in this browser.
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Sent only when you ask
Your writing goes to our AI provider only when you analyze, compare or test, and only the text that request needs.
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Never in your downloads
Signed-in Voices are saved privately to your account. Downloads never include your writing samples.
For teams
One voice, or a whole brand?
Voice DNA
Your own voice, built by you.
For founders, leaders and anyone who writes under their own name. Build your Voice in a few minutes and take it to any AI tool.
Create my VoiceContentEngine
Your organization’s voice, built for your team.
Your brand voice, knowledge, offers and rules in one approved system, built and tested by FieldSignal and run by your team every week.
See ContentEngineYour writing already has a voice. Let AI learn it.
Create and test for free · Pay once to download
Questions
Questions about Voice DNA.
What is Voice DNA?
Voice DNA is an app from FieldSignal that makes AI sound like you. You paste a few things you’ve written, and it turns them into a Voice that ChatGPT, Claude and Gemini can follow.
What is a Voice?
Your saved Voice reflects how you write. AI follows its six style settings and avoids words you don’t use.
How much writing do I need?
At least two pieces you wrote yourself, about 400 words in total. Different kinds of writing, like an email and a post, give a closer match.
Which AI tools does it work with?
Any AI tool that accepts custom instructions or skills. You also get ready-made prompts for ChatGPT, Claude, Gemini, Codex and Replit.
Do I need an account?
Not to start. Sign in when you want to save your Voice and download it.
What does it cost?
Creating and testing your Voice is free. To download it, you pay once for each Voice. There’s no subscription.
What happens to my writing samples?
You choose whether to keep them with your Voice. You can remove them any time and your Voice settings stay. Downloads never include your original writing samples.
How is Voice DNA different from ContentEngine?
Voice DNA captures one person’s voice, and you build it yourself in a few minutes. ContentEngine is a full content system for an organization: your brand voice, knowledge, offers and rules, built and tested by FieldSignal and run by your team.
Talk to us
Thinking about your whole team?
Tell us how many people write for your brand and where their drafts go wrong. We’ll tell you whether Voice DNA or ContentEngine is the better fit.