Free brand voice generator: Your brand voice guidelines, written from your own site

Your website, LinkedIn posts and newsletters are written by different people, sometimes an agency, more and more often an AI. Without shared rules, your brand sounds different on every channel.

Brand voice guidelines fix that. The Mark AI generator gives you a first version in 30 seconds, drawn from what your site already says. You review it, adjust it, and the whole team writes the same way.

What is brand voice?

Brand voice is the personality of a brand in writing: the words it picks, the length of its sentences, how it addresses readers, what it proves and how. A strong brand voice is recognizable even without the logo.

Brand voice vs tone

Your voice stays the same everywhere. Your tone adapts to the moment. A brand can be direct and warm in its voice, then more reassuring in a support email and more energetic in a launch post.

What goes into brand voice guidelines

Good guidelines fit on a few pages. They hold 7 parts, and the generator fills each of them for you.

1. Positioning and audiences: what you offer, to whom, and the promise you make.
2. Tone of voice: 3 or 4 traits, each with what it is and what it is not. "Expert, not jargon-heavy" guides better than "expert" alone.
3. How you address readers: you, we, or an impersonal voice, and the same everywhere.
4. Writing rules: sentence length, figures, technical terms, headings, calls to action. Every rule should be checkable on a draft.
5. Vocabulary: the words that carry your brand, and the ones to drop with their replacement.
6. Before and after examples: a real piece of copy, then its on-brand version. This is the part teams actually read.
7. Channel guidance: what changes on LinkedIn, in a newsletter or on the blog.

Brand voice examples

Three fictional brands show how much a voice can differ, even when the facts are similar.

Ledgerly, accounting software for finance teams

Voice: clear, reassuring, precise. Sample: "Close your books in 3 days, not 10. Ledgerly matches every transaction and flags the few that need a human."

Harbor, a private bank

Voice: discreet, expert, warm. Sample: "Your wealth plan, reviewed every quarter by the same advisor, in plain language."

Trailhead, an outdoor gear retailer

Voice: energetic, practical, friendly. Sample: "Rain at 2,000 meters? This shell weighs 280 g and packs into its own pocket."

Each sample says one concrete thing, in words the audience uses. The generator applies the same approach to a paragraph from your own site.

How the brand voice generator works

1. You enter your website, or the address of a specific page.
2. Mark reads that page, your home page, then up to 4 key pages found in your links: about, blog posts, offers.
3. An AI analyzes the copy: sentence length, how readers are addressed, recurring words, promises, proof.
4. It writes the guidelines: positioning, tone, rules, vocabulary, channel guidance and gaps found.
5. You see the essentials right away: positioning, tone, first rules and the before/after. The full guidelines open in Mark.
6. It rewrites a real paragraph from your site with these guidelines, so you see the difference.

The tool only reads public pages. If your site blocks robots or renders only with JavaScript, enter the address of a blog post: those pages are often easier to read.

How to make your team and your AI follow it

Guidelines rarely fail on substance. They fail because nobody opens them while writing. A few habits help:

• Keep them short: 1 page of rules beats 40 pages of principles.
• Show before and after examples: they say more than adjectives.
• Put them where people write: in the brief template, the writing tool and the instructions of your AI tools.
• Review with a simple checklist: how readers are addressed, sentence length, banned words.

Generative AI tools write in a generic voice by default. Paste your guidelines into their instructions and they get closer. In Mark, the guidelines go further: they become the Brand Guide of your AI agents, applied to every article, post or product page before your team reviews it.

Brand voice FAQ