Make Claude Sound Like You: Voice Guide

People can tell when you used AI. The phrases give it away every time. "Let’s dive in." "In today’s fast-paced world." That’s not how you talk, and Claude’s default voice isn’t yours.

Both fixes below work the same way. You give Claude real things you wrote, it studies the patterns, and you save the result somewhere Claude reads every time.

Heads Up: Styles Are Gone

My original video showed Claude’s built-in Styles menu. Anthropic retired Styles in 2026 and moved them to skills. If you made a custom style before, it’s now a skill that starts switched off. Turn it on under Customize (now called Plugins on newer accounts), then Skills, and call it by typing / plus your style’s name (lowercase, spaces turned into hyphens) in a chat.

Gather 5 real samples

Pull five things you wrote yourself, with no AI edits. Mix the moods so Claude sees your range. A casual text, a work email, an excited caption, a blunt pushback and a pitch work great.

Run the voice profile prompt

Open a new chat in Claude, paste the prompt, drop your samples into the brackets and send. Answer its quick questions. You get back one short block of rules written in your voice.

Voice Profile Prompt

You are a writing coach who studies how one specific person writes, so an AI can write exactly like them. Your job is to turn my real writing samples into a voice profile I can paste into my AI's instructions. MY SAMPLES (5 pieces I actually wrote, not edited by AI): 1. Casual (a text or DM): [paste] 2. Work (an email or Slack message): [paste] 3. Excited (a caption, post, or message where I was hyped): [paste] 4. Frustrated or blunt (a complaint, a pushback, a hard no): [paste] 5. Persuasive (a pitch, a sales message, a "you should do this"): [paste] STEPS: 1. Read all five samples. Note what stays the same across every mood and what changes by mood. 2. Measure the mechanics: typical sentence length and how much it varies, how I open and close messages, punctuation habits (dashes, ellipses, exclamation points, emoji, lowercase), contractions, and paragraph length. 3. Pull my real vocabulary: words and phrases I repeat, slang, how I swear or don't, how formal I get. 4. List what I never do. Words, structures, and tones that would sound wrong coming from me. 5. Ask me up to 3 short questions if something is unclear (for example, whether I use emoji at work). Wait for my answers before writing the profile. OUTPUT (one copy-ready block, under 350 words, written as instructions to an AI): - "Write like [my name]." followed by 5 to 8 bullet rules on rhythm, punctuation, and word choice, each with a short example quoted from my samples. - "How my tone shifts" with one line each for casual, work, excited, frustrated, persuasive. - "Never write" with my banned phrases. Always include: "let's dive in", "in today's fast-paced world", "it's worth noting", "game-changer", "I hope this email finds you well", em dashes, and "not just X, but Y". - "Before sending, check" with 3 quick self-checks. GUARDRAILS: - Only describe patterns that actually show up in my samples. Do not invent quirks. - Quote my samples exactly. Do not polish them. - Keep it short enough to fit in an instructions box.

Save it where Claude always reads it

Copy the block into Claude’s settings. Go to Settings, then Your Claude, and paste it into Instructions. Claude follows that box in every new chat, on every plan.

Or keep it to one Project

If you only want your voice for content, make a Project, click Set project instructions and paste it there instead. Your other chats stay neutral.

Make It Better Over Time

When Claude writes something that sounds off, tell it what you’d have said instead, then ask it to add one new rule to your profile. Swap the updated block into your settings.

Voiceprint is a free, open-source plugin by James Kemp. It runs a real stylometric analysis of how you write, down to how much your sentence length swings and your punctuation habits. Then it builds a writer skill that imitates you. (Voiceprint on GitHub)

Get Claude Code

Voiceprint runs in Claude Code, which comes with the Pro plan and up (it’s not on Free). Install it here and sign in.

Add the plugin

In your terminal, run these two lines:

claude plugin marketplace add jamesckemp/claude-plugins

claude plugin install voiceprint@jck-claude-plugins

Already inside a Claude Code session? Type /plugin marketplace add jamesckemp/claude-plugins, then /plugin install voiceprint@jck-claude-plugins, and pick a scope. In the desktop app’s Code tab, add the marketplace the same way, then click + next to the prompt box and choose Add plugins to find Voiceprint.

Run it

Type /voiceprint:generate in Claude Code. It gives you five prompts to answer in your own words (casual, explanatory, enthusiastic, frustrated and persuasive), then eight multiple-choice questions about your sentence structure, punctuation and rhythm.

Ban the AI patterns you hate

Four more questions build your avoid list. This is where you kill "let’s dive in" for good.

Use your writer skill everywhere

You get one file, yourname-writer/SKILL.md. It works in Claude Code right away. To use it on claude.ai too, zip the folder and upload it under Customize (or Plugins), then Skills. Skills need code execution turned on. (How skills work) To tweak it later, run /voiceprint:refine.

Make Claude SoundExactly Like You

Make Claude Sound
Exactly Like You