In plain words
This is a friendly summary of the policy above. It isn't a replacement for it. If the two ever differ, the formal policy controls.
Most calculators run in your browser, so the numbers you type don't have to leave your device. Like any website, we may see technical details such as your IP address and which pages you opened. Ads and analytics, where enabled, may use cookies.
What stays on your device
For a tool labeled as running in the browser, the maths happens on your machine. Loan amounts, salary figures, margins and measurements aren't sent to us to get a result. Some tools can save preferences in your browser's local storage. That data stays with you, and clearing site data removes it.
You don't have to take our word for it. Open your browser's developer tools, switch to the network tab and use a calculator. You'll see whether anything is sent as you type.
Tools that do use our server
The On-Page SEO Checker has to fetch a public page, so it runs on our server. When you check a URL we store the address without query strings or fragments, the score and the time. The ten most recent checks are shown publicly on the tool page.
So don't enter addresses you want to keep private. Staging, local and IP-address hosts aren't listed. Star ratings are stored against a one-way hash of a visitor cookie, with no name or email attached.
Cookies, ads and analytics
We may use cookies for preferences, analytics or advertising. Ad and analytics providers have their own policies for what they collect. You can block or delete cookies in your browser settings, and most browsers let you do it per site. The tools work without them.
To stop automated abuse, we use Google reCAPTCHA and Cloudflare Turnstile. Those services process some technical data under their own terms.
Your choices
Clear cookies and local storage any time. Use a private window if you'd rather leave no trace on your device. Use a content blocker if you'd rather not load ads. Write to the contact address if you have a privacy question or believe a public listing is unlawful.
The site isn't aimed at children under 13, and we don't knowingly collect their personal information.
Plain answers to common questions
Do you see what I type in a calculator? No. The math happens in your browser. Do you sell my data? No. Do you set cookies? Some, for basic function and for analytics and advertising where allowed. The details are above, and you can change your choices in your browser settings.
What about the contact form? We receive what you type, so we can reply. We keep it as long as we need to handle your request.
If you have more questions, write to us on the contact page.
In short
Most tools run entirely in your browser, so the numbers you type stay on your device. We don't ask you to sign up to use them. Basic traffic data, like which pages get visited, helps us see what works and what breaks.
Ads and analytics services may set cookies. You can block them in your browser settings, and the tools will still work. If you contact us, we keep your message only as long as needed to answer it.
For questions about your data, use the contact page. We'll reply and, where the law gives you the right, act on your request.
Cookies and your choices
You can clear or block cookies in your browser at any time. The tools keep working without them, though some preferences, like a saved theme, may reset. If you use a privacy extension, it should work fine here.
Children under 13 aren't our audience and we don't knowingly collect their data. If you think a child has sent us information, write to us and we'll remove it.