About Kdp.Cool

A portal of fast, no-signup web tools.

Who maintains it

Kdp.Cool is a small independent project. There is no parent company, no app-store listing, and no account database. Bug reports, math corrections, and tool ideas go to hello@kdp.cool.

We publish review dates on educational pages so you can see when a tax year or a formula walkthrough was last checked. If a figure is wrong, email hello@kdp.cool with the page URL and the numbers you expected.

What this is

Kdp.Cool publishes focused, single-purpose web tools. The mortgage, paycheck, and federal income-tax calculators run on this hostname, next to original guides that fill in the same formulas with static examples. Other tool families live on their own subdomains. The goal is practical: open a page, use the tool immediately, understand how the result was produced, and leave without creating an account.

What lives on this site

• Calculators on kdp.cool — Mortgage, paycheck, and federal income-tax tools, each with a worked example and a matching guide.
• Guides — Original explainers that fill the same formulas by hand so you can check the method without JavaScript.
• Related finance tools — Auto loan and compound interest stay on calc.kdp.cool and link back here for the longer write-ups.

Other small utility hostnames under the same project (converters, text, developer, and AI helpers) are secondary. The pages you should judge this site by are the calculators and guides on kdp.cool.

Why it exists

Most online tools are slow, require email signups for "premium features," hide the math, and hammer you with intrusive ads. We built Kdp.Cool because we wanted the opposite: instant, transparent, free.

How we keep it free

There is no premium tier and no email wall. Hosting and maintenance are paid for by Google AdSense on reserved layout slots. During review those slots stay quiet; after approval they may show ads, still without popups, interstitials, or fake buttons. The calculators, converters, and guides remain usable if you ignore the ads. If you want to help without clicking anything, share a link.

We do not sell leads, do not rent an email list (we do not have one), and do not charge “unlock” fees for showing a formula.

Our methodology

• Source data: Where applicable, we cite the authoritative source (e.g., the IRS Revenue Procedure number for tax tables).
• Math: Every calculator shows its formula in a "Show the math" section, so you can verify or learn. No black boxes.
• Local-first tools: When a task can run in the browser, it should. Text, JSON, Base64, and similar inputs stay on your device.
• Maintenance signals: Tool pages include review dates, limitations, and plain-English explanations so readers can judge whether the result fits their situation.
• Corrections: Found a wrong figure? Email hello@kdp.cool with the page URL, what you entered, and what you expected.

What data is not collected

The tools run in your browser. We do not create accounts, so we do not collect names, email addresses, passwords, or payment methods. Numbers you type into a calculator are not uploaded to our servers as a saved profile. If a tool puts state in the URL, that is so you can bookmark or share a scenario; it is still just a request for a static page. We also do not ask for tax documents, bank statements, or customer lists, and you should not paste them into a text box.

We do not run our own analytics snippet. The only third-party script on these pages is Google's AdSense loader, which may use cookies after ads are approved. That is described on the Privacy page. This About page is the human-language version of that boundary: if a task requires sending us your data, we probably should not have built it as a public static tool.

What we do not do

• No email walls for basic tools.
• No fake rankings, scraped tool directories, or pages made only to chase search keywords.
• No popups, auto-playing video ads, or interface tricks that push accidental ad clicks.
• No server-side upload for tools that can safely run in the browser.

What's next

Active work is the mortgage, paycheck, and federal income-tax calculators on this site, plus the guides that walk through the same numbers. Other families stay on their own hostnames. We prioritize tools that solve a repeatable task, show the formula, and cite an official source where the number can go stale.

Contact

See Contact.