What does the free brand voice checker do?
It finds the words your customers use, and shows whether your homepage uses them. Paste 12 or more reviews or testimonials. Copytone shows the phrases two or more of them share, ranked by how many separate reviews use each, and three short quotes with those phrases marked. Then give your homepage's address. Copytone reads it and shows how its wording compares, with the three gaps your customers would notice first: what they say, beside what your homepage says.
Does it check tone of voice too?
Yes, with one difference. Most tone checkers label writing as formal, friendly or confident. This one compares your wording with your own customers' words, so it shows whether you sound like the people who already buy from you. There is no score, because a number can't tell a great sentence from a safe one.
Try the plain English checker or the readability checker on any writing.
Where do the reviews come from?
From you. Paste reviews or testimonials from wherever you have them: your website, Google, a review site's export, survey answers or emails from happy customers. Put one on each line, or a blank line between each. Copytone never collects reviews itself and never reads review sites.
Why does it need 12 reviews?
So what it shows is how your customers talk, not one or two people. With fewer than 12, it says how many more it needs and shows nothing else. A phrase shows only when two or more separate reviews use it, and names and contact details are taken out before anything is counted.
How do I use customer reviews in my website copy?
Start from the phrases more than one customer uses, not your favourite review. Use them where a visitor decides: the headline, the first paragraph and the button. Keep their words as they wrote them, and quote a review only where you have permission to. The gaps the checker shows are a good place to start on your homepage.
The guide to using customer reviews in your website copy takes it step by step, with what to avoid.
Is it free, and what does it keep?
It's free, with no account and no card. Nothing you paste is kept: your reviews are counted and compared, then dropped once your answer is sent. Copytone notes that the tool ran and which homepage it checked, never a word of your reviews. How your words are handled is set out in our privacy notice.
The privacy notice says what is kept. How the homepage is read is set out on the CopytoneBot page.
What needs an account?
Everything past your homepage. A 7-day trial checks every page of your site, and everything your team writes, against all your customers' words, and suggests versions in their words. A person decides every change.
What can it not tell you?
Whether a sentence is true, or allowed under advertising rules. It shows how your wording compares with your customers' words. It doesn't approve anything, and a person decides what to change.
More free tools
- AI cliché checkerSee which words and phrases make your website sound like ChatGPT, with a plainer way to say each.
- Plain English checkerFind the words and long sentences that make writing harder to read, with what to say instead.
- Readability checkerSee your writing's reading level as a reading age or a US grade, against the NHS, Australia's Style Manual or WCAG.
- Tone of voice guidelines templateA guide to how your business sounds, with a section for the words your customers use.
By Owen Fisher, Copytone. Last reviewed 10 October 2026.