Tone of voice is the personality that comes through in a piece of writing: the word choices, the rhythm of the sentences and the level of formality that make a text sound like one particular person or company rather than no one in particular. Two writers can state the same fact and leave very different impressions. One sounds warm and direct, another careful and distant, a third like a legal notice. That difference is tone.
Voice and tone are often paired, and the distinction is worth keeping. Voice is the stable personality of a writer or a company (its brand voice); tone is how that voice bends to the moment, so a launch announcement and an apology for an outage can share a voice and still sound different. In everyday use, "tone of voice" covers both.
What it looks like
| Tone | The same message |
|---|---|
| ToneFormal | The same messageWe regret that your order has been delayed and expect to dispatch it within three business days. |
| ToneConversational | The same messageSorry, your order's running late. It should ship in the next three business days. |
| TonePlayful | The same messageYour order got stuck in traffic. We're on it, and it should be out the door within three business days. |
Read the rows again and notice what moved: "dispatch" against "ship", one long, balanced sentence against two short ones, no contractions against a contraction and a figure of speech. Those are the levers of tone, and you can pull each of them on purpose.
- Word choice. Plain words read as direct; Latinate words read as official. "Use" and "utilize" mean the same thing and sound like different people.
- Rhythm. Long sentences with subordinate clauses feel measured. Short ones feel decisive.
- Formality. Contractions, addressing the reader as "you" and first-person pronouns all pull a text toward conversation.
- Figures of speech. A metaphor or a joke signals that a person is talking, not an institution. One is a flavor; five is a performance.
Why it matters
Readers rarely name tone, but they feel it, and they notice when it slips. A document that opens warm and turns bureaucratic halfway through reads as if two people wrote it. Consistent tone is a large part of what makes writing trustworthy.
It matters more now because language models have a tone of their own: a neutral, slightly formal register with its own favorite phrases. When a model rewrites your paragraph it pulls it toward that middle, and the result is correct and sounds like no one. A paraphrase that keeps your meaning but drops your tone has lost the thing a reader would have remembered. Tone is the part of writing a model cannot guess; it can only keep or lose the one you give it.
How to describe your tone
The instinct is to reach for adjectives: "friendly but professional", "confident and approachable". Those phrases fit almost every company website, and a model can do little with them. Examples beat adjectives. Three things work.
- Show a sample. Two or three paragraphs you have written and are happy with say more than any label. "Match the tone of this" gives a model more to work with than any adjective.
- Name the specific choices. Contractions or not. Second person or not. Typical sentence length. Words you use and words you never use.
- List the tells you don't want. It is often easier to say what to avoid: no exclamation marks, no rhetorical questions, no "In today's world".
A tone description a model can follow
Tone: direct and plain. Short sentences; contractions are fine.
Address the reader as "you". No exclamation marks, no rhetorical
questions, no openers like "In today's world". Prefer the concrete
noun ("the invoice") to the abstraction ("the documentation").
Sample to match:
"The export failed because the file was still open in Word. Close it
and try again. If it fails twice, send us the file and we'll look."Written down like this, a tone description becomes the heart of a style guide. It is also exactly the kind of standing instruction that belongs in a system prompt, so you set it once instead of repeating it with every request.
Tone of voice in Strokes
The quickest way to keep your tone in Strokes is to give the Assistant something to imitate: add a document you have written to the chat as context, then ask for the rewrite in that tone. When you select a passage and press ⌘K, the instruction can carry the tone too: "make this shorter, keep it casual". The change lands in place, next to the paragraphs around it, so you can tell at a glance whether it still sounds like you.
Related terms: readability, a separate axis from tone; style guide.