How our tools actually work

Everything runs in your browser

When you open a calculator, converter, or formatter on this site, the math and the file processing happen on your device — inside the tab you're looking at. Nothing about what you type is sent to our servers for computation. There are no background uploads and nothing is stored in a database under your name.

That's not marketing copy — it's how the code is written. The tools are built as static JavaScript bundles that Next.js pre-renders at build time and delivers as plain HTML/JS. The "server" is just a CDN handing you files. Once the page loads, the tool works even if you lose internet.

What stays on your device

• Everything you type into a calculator, form, or text box.
• Any file you drop into a converter or editor (images, PDFs, audio, video). Files are read directly from your disk via the browser's File API and processed in memory.
• Your favorites and recently-used tools. We store those in localStorage on this device only — they don't sync across devices and no server sees them.

What we do see

To run the site, a few things unavoidably touch a server:

• Page requests. Your browser asks our host (Vercel) for the HTML/JS of the page you're on. Standard web-server logs (IP, user agent, path) exist for ~30 days, like every site on the internet.
• Anonymous analytics. We use Vercel Analytics to count page views and get a rough idea of which tools people actually use. No cookies. No cross-site tracking. No identifying you as a person.
• Ads. Google AdSense serves the ads. AdSense sets its own cookies and may personalize ads if you've consented with Google elsewhere. See our privacy page for the exact details.

What we never do

• Ask you to sign up or create an account.
• Take payment information.
• Save your file uploads or your typed inputs to a database.
• Sell data about you to third parties.
• Email you for any reason — there's no mailing list.

Honest limits

Browser-only has real tradeoffs and we'd rather tell you upfront than pretend otherwise:

• Very large files (hundreds of megabytes) can slow down or crash the tab — the browser doesn't have server-class RAM. Try smaller chunks or a desktop app for those.
• Closing the tab loses your work. We don't save drafts anywhere. Export or copy your result before you close.
• Math tools are informational. A mortgage or loan calculator gives you a reasonable estimate to plan with, not a binding quote. For big financial decisions, talk to a licensed professional.
• Third-party API tools (IP lookup, public holidays, password-breach check) send a single anonymous request to a documented public API. Those are called out individually on the tool page.

Want to verify any of this?

Open the browser devtools on any tool page, click the Network tab, and run the tool. You'll see the initial page/JS load, the Vercel Analytics beacon, and the AdSense requests — and not much else. No hidden POST to a backend API, because there isn't one.

We also publish our calculation methodology, editorial policy, AI content policy, and security posture so you can see how results are produced and how the site is maintained.

Found something off?

Calculations that look wrong, a tool that breaks, a page that reads like marketing fluff — we want to hear about all of it. Email us and we'll fix it.