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zelvorm
Help centre

Using the free checkers and generators.

All helpOpen the tools
Getting started
  1. 1Open any tool. There's nothing to sign up for.
  2. 2Type the website address or fill in the form.
  3. 3Read the result. Each one says what to do about it.
  4. 4Create a free account if you want to keep favourites.
How it works

What the tools can see

Tools that check a site read its public pages, the same as a visitor would. They can't see anything behind a login.

Following a real address through its redirects, then working out VAT. Recorded from the real product on 9 November 2026, using sample data so no customer's details are shown.
Troubleshooting

When something goes wrong.

Not listed here? Tell us what happened.

Tools that fetch a website allow 8 to 30 uses an hour for each visitor. Try again in a while.