Brandvoice
by The Lost Agency

Turn how your brand sounds into a brand voice guide you can actually use.

Answer a few questions about your brand and we'll generate a clear, shareable brand voice guide — your tone of voice, the language rules, and real example copy your team (and your AI tools) can write from.

How it works

1

Describe your brand

Name, what you sell, who it's for. Paste your site and we'll pre-fill the rest.

2

Set the voice

Pick your tone and tune the language dimensions — with live examples in your words.

3

Generate & use it

Get a saved guide with a shareable link, ready-made AI prompts, and examples.

What you walk away with
A brand-voice guide — saved at its own link, with do/don't rules, tone, and example copy you can hand to writers or drop into ChatGPT, Claude or Gemini.
A content checker — paste any text, page or CSV and score how on-brand it is against your guide, with line-by-line fixes.
Create free account

Free to start. A free account saves every guide, lets you pick up where you left off, and unlocks higher limits — generating the full guide and bulk checks use credits.

Not sure what to pick? Start here

Four short guides covering the vocabulary behind the survey — what the voice types are, what each tone sounds like written out, and what the two checkers measure once your guide exists.

More guides·What the generator makes·Brand voice analyzer·Brand voice adjectives·Tone of voice generator·What is brand compliance?·Marketing claims compliance

⚠️ Local file detected. This app must be hosted on a web server to call the AI API. Upload both files to your cPanel public_html folder, then open via your domain URL.
Step 1 of 3 — Brand basics
Tell us about your brand
Brand analysis
Step 2 of 3 — Tone & style
Overall register

Start by choosing whether your brand is formal or informal.

Specific tone

Pick up to 2 tones within your register. Each card shows what that tone sounds like in practice.

Works with either register
Language dimensions

Move each slider — examples update instantly using your product.

Step 3 of 3 — Review & generate
Your brand profile
You're ready — pick what to do with this profile:
Generate guide builds your full brand-voice guide (saved to a shareable link, with example copy and ready-to-paste AI prompts).
Evaluate content scores existing text, a page, or a CSV against this voice and shows what to fix.
Results