Brand Voice Codifier
Turn your best writing into a reusable voice guide
The problem
Every AI-written email, post, or ad sounds a little off until you spend twenty minutes rewriting it into "how we actually talk." The problem isn't the AI's writing ability — it's that it has never seen your voice. This turns a handful of your best emails, posts, or web copy into a short, reusable voice guide you paste into any future prompt so the output sounds like you from the first draft.
The tool
You are a brand voice analyst. Your job is to reverse-engineer a written
voice from samples so precisely that someone who has never met the author
could write in that voice convincingly.
MY WRITING SAMPLES (paste 3-5 pieces of your best, most "you" writing —
emails, social posts, web copy, anything you're proud of):
[PASTE SAMPLE 1]
[PASTE SAMPLE 2]
[PASTE SAMPLE 3]
CONTEXT: My business is [WHAT YOU DO] and I'm writing mainly for
[AUDIENCE]. I want this voice guide used for [WHERE: e.g. social posts,
emails, website copy].
YOUR TASK — build a "Voice Card" in 5 parts:
1. TONE (3-5 adjectives, each with one sentence explaining what it means
in practice — not generic adjectives like "friendly," but specific ones
like "direct but never blunt").
2. VOCABULARY: Words and phrases I actually use repeatedly (pull these
directly from the samples). Words I clearly avoid (formal jargon,
corporate phrases, etc. — infer from what's absent given my industry).
3. SENTENCE PATTERNS: Typical sentence length, how I open pieces, how I
close them, my use (or avoidance) of questions, exclamation points,
contractions, and humor.
4. DO / DON'T LIST: 5 concrete "do this" rules and 5 concrete "never do
this" rules, written so specifically that another writer could follow
them without ever meeting me.
5. THE VOICE CARD: A condensed version of the above (150 words max) that
I can paste at the top of any future AI prompt as a standing
instruction.
RULES: Base every observation on the actual samples — do not invent traits
you can't point to evidence for. If the samples contradict each other,
flag the inconsistency instead of averaging it away. If a sample is too
short to draw a rule from, say so.How to use it
- 1Gather 3-5 pieces of writing you consider genuinely "you" — not your worst, your best.
- 2Paste them into the prompt along with context about your business and audience.
- 3Review the Voice Card for accuracy — if something feels wrong, tell the AI which part and why, and ask it to revise.
- 4Save the final 150-word Voice Card somewhere permanent (a note, a doc, a Claude Project).
- 5Paste that Voice Card at the top of every future content prompt — social posts, emails, ads — to keep output consistent.
- 6Update it every few months as your writing or positioning evolves.
Example
Input: three samples from a boutique fitness studio owner — an Instagram caption, a re-engagement email, and a website "About" paragraph — all casual, high-energy, first-person, lots of short sentences and exactly one exclamation point per piece.
Sample Voice Card output:
TONE: Warm but no-nonsense — encouraging without cheerleading; talks to members like training partners, not customers.
VOCABULARY: Uses "show up," "your session," "no judgment" repeatedly. Avoids "fitness journey," "wellness," and any words ending in "-preneur."
SENTENCE PATTERNS: Short sentences (under 15 words), opens with a direct address ("You skipped Tuesday."), one well-placed exclamation point per piece, never more.
VOICE CARD (paste-ready): "Write like a training partner, not a brand. Short, direct sentences. Warm but never syrupy — no 'fitness journey' language. Talk about 'showing up,' not 'crushing goals.' One exclamation point max per piece. Always end with a specific next action, not a general encouragement."
Pro tip
Include at least one sample where you were annoyed or firm (a policy email, a boundary-setting post) — voice guides built only from upbeat marketing copy miss how you sound when you're not selling, which is exactly when AI-written support replies and objection responses go flat.
Related tools
Want this customized and automated for your business?
We take the tools in this toolbox and wire them into your business — your data, your brand voice, running on autopilot.
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