What Is a Brand Voice Chart? (And How to Build One)
A brand voice chart is a table that maps each dimension of your brand's voice to four things: what the trait means, what to do, what not to do, and a short example. Each row covers one trait (say, "warm" or "direct"); each column turns that trait from an adjective into an instruction a writer can follow.
That last part is the whole point. "Our voice is bold, human, and clear" is a vibe. A voice chart is a spec. It takes the words everyone nods along to in the brand deck and pins them to concrete behavior, so two writers on two different teams produce copy that sounds like the same company.
If you're still defining the underlying traits, start with how to define your brand voice and come back here to make those traits operational.
Why a voice chart works
Most brand voice documents fail for the same reason: they describe a feeling instead of prescribing an action. "Approachable" means something different to every person who reads it. A voice chart fixes this by forcing each trait through a do/don't filter, which does three useful things.
- It removes interpretation. "Be approachable" is a suggestion. "Use contractions; don't use words a 12-year-old wouldn't" is a rule. Rules are reviewable; suggestions are arguable.
- It makes voice testable. When a trait has a clear "don't," you can hold any sentence up against the chart and get a yes or no. Editing becomes a question of compliance instead of taste.
- It scales past the founder. Early on, the founder is the voice. A chart is how you transfer that instinct to a freelancer, a new hire, or an AI tool that has never met you.
The shift is from describing voice to enforcing it. That distinction is the difference between a chart and the rest of your brand voice guidelines sitting unread in a shared drive.
The anatomy of a voice chart
Every good voice chart shares the same skeleton. Four columns, one row per trait.
Trait
The voice dimension itself, named in a single word or short phrase. Keep your list tight: three to five traits is the sweet spot. More than five and nobody remembers them; fewer than three and your voice has no texture. Pick traits that are distinctive to you; skip table stakes like "professional" that every competitor would also claim.
Description
One or two sentences explaining what the trait means in your specific context. "Confident" for a law firm and "confident" for a skincare brand are not the same instruction. This column is where you disambiguate.
Do
The behaviors that produce the trait. Be concrete and grammatical: sentence length, word choices, punctuation habits, point of view. "Lead with the benefit, then the feature" is a do. "Sound helpful" is too vague to be one.
Don't
The behaviors that kill the trait, including the failure mode each trait tends to slide into. This is the most valuable column and the one most charts skip. Every strength has a shadow: "confident" tips into "arrogant," "friendly" tips into "unprofessional." Naming the shadow is how you keep writers from overcorrecting.
Many teams add a fifth Example column with a short before/after or a sample line. It's optional, but examples resolve arguments faster than definitions do. For more on how traits differ from the moment-to-moment register you flex by situation, see brand voice vs tone of voice.
A worked example
Here's a voice chart for a fictional brand: Northbeam, a B2B project-management tool that sells to operations leads. Their positioning is "calm competence": the tool that makes chaos manageable. That positioning drives every row.
| Trait | Description | Do | Don't |
|---|---|---|---|
| Calm | We never sound panicked, even about urgent problems. | Use short declarative sentences. State the fix before the fear. | Don't use urgency-bait ("ACT NOW"), all-caps, or three exclamation points. |
| Precise | We say exactly what we mean with numbers, not vague reassurance. | Cite concrete outcomes ("cuts status meetings by 40%"). | Don't hide behind "robust," "seamless," or "powerful." |
| Plainspoken | We talk like a smart colleague, not a vendor reading a script. | Use contractions. Use "you" and "we." Explain jargon once. | Don't use enterprise-speak ("synergize," "leverage learnings"). |
| Quietly confident | We know the product is good and don't need to shout it. | Make claims and let them stand. Lead with the benefit. | Don't hedge ("we think maybe"). Don't oversell or beg. |
Notice how every "don't" names a specific failure mode, and the banned filler words ("robust," "seamless," "synergize") are written out so an editor can search for them. That list of forbidden words is the connective tissue between a chart on paper and enforcement in practice. For more fleshed-out brand personalities, browse our brand voice examples.
How to build your own, step by step
You can draft a usable chart in an afternoon. The trick is to derive it from copy you already love rather than inventing traits in a vacuum.
1. Gather your best copy
Pull together 5 to 10 pieces of writing that sound unmistakably like you at your best: a landing page, a few emails, a founder's LinkedIn post. You're going to reverse-engineer the chart from real sentences instead of adjectives you wish were true.
2. Name the traits
Read through and mark what makes the good stuff good. Are the sentences short? Is there dry humor? Cluster the patterns into three to five named traits. If you're stuck, a tone of voice generator can give you a first draft of trait words to react to and refine.
3. Write the descriptions and do/don'ts
For each trait, fill in the row. The fastest way to write a sharp "don't" is to picture the nearest bad version of the trait and write the rule that prevents it. Pull do/don't examples straight from your gathered copy where you can.
4. Build your banned-words list
Every brand has words that quietly cheapen it: corporate filler, off-brand slang, competitor terminology. List them now while you're in the mindset. Written down, the list becomes an enforceable rule.
5. Pressure-test it
Take a fresh piece of copy and edit it using only the chart. If the chart can't tell you whether a sentence passes, a row is too vague. Tighten it. A grab-and-go brand voice guidelines template gives you a structure to drop all of this into.
How to operationalize it across channels and AI
A chart that lives in a doc gets read once. A chart that lives in your workflow shapes every piece of copy. Two things make it operational.
First, add per-channel rules. Your core traits stay constant, but how they show up shifts by surface. The same "plainspoken" brand writes differently in a sales email than on a pricing page. Layer a thin set of channel rules on top of the chart (length, formality, emoji policy, CTA style) so the chart adapts without fracturing into four different voices.
Second, enforce it where the writing actually happens. This is where most voice charts die: a generic AI tool ignores your chart and hands you copy that sounds like everyone else's. That's the problem My Brand Voice is built to solve. Its Voice DNA learns your tone and vocabulary from the best copy you fed into step one, so the chart becomes the model's default rather than a PDF the AI never sees. Every draft gets a Brand Score from 0 to 100 grading how on-brand it is, with the same do/don't logic baked in. Your per-channel tone and format rules apply automatically, and your banned-words list is enforced at the point of generation instead of three rounds later in editing.
That's the difference between a chart you hope people follow and a chart the system follows for you. If you want the deeper background on voice as a discipline, the complete guide to brand voice covers the strategy this chart operationalizes, and the glossary defines the terms along the way.
A brand voice chart is the most leverage you can get from a single table: it turns "this feels off" into a specific, fixable rule. Build one this week, then let My Brand Voice do the enforcing: Voice DNA, Brand Score, per-channel rules, and banned-words checks on every draft, free for 7 days with no credit card.