NetDetectHubGet the app
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Get the app

Put NetDetectHub on your home screen. It opens like an app. The checks need an internet connection (they ask live sources), but the subnet calculator and the pages you've opened also work offline. Free, no account, no app store.

If your browser shows an install option, the button above does it in one tap. Otherwise follow the steps for your device below.

Save every page for offline use

Pages you open are kept automatically. To have all of them ready, download them once now: about 1 MB. The subnet calculator then works fully offline; the other tools still need a connection to check anything.

Android (Chrome, Edge, Samsung Internet)

  1. Open netdetecthub.com in your browser.
  2. Tap the menu (⋮) and choose Install app or Add to Home screen.
  3. Confirm. The icon appears on your home screen.

iPhone and iPad (Safari)

  1. Open netdetecthub.com in Safari.
  2. Tap the Share button (the square with an arrow).
  3. Choose Add to Home Screen, then Add.

Computer (Chrome or Edge)

  1. Click the install icon at the right end of the address bar, or open the browser menu and choose Install NetDetectHub.
  2. It opens in its own window and gets a shortcut like any other program.

What the app does and doesn't do

  • It's the same site, in its own window, without the browser bars.
  • Your numbers stay on your device, exactly as on the website. There's no account.
  • Calculators you've opened (or all of them, with the button above) work without a connection.
  • To remove it, delete it like any other app.

Results come from public DNS, registry and certificate data and from checks run from Cloudflare's network at the moment you ask. They can differ from what another network sees. How our tools work · Terms of use.