Paste it in. Know if it's right.

Free checkers for the codes and numbers on everyday paperwork. Everything runs in your browser, so nothing you type is sent anywhere.

Tools

• IBAN checkerCheck a bank account number (IBAN) for any of 105 countries and see why it fails.
• VIN lookupCheck a vehicle identification number and see the make, model, year and engine.
• Tax code checkerSee what your UK tax code means, how much you can earn tax-free and whether you could be paying too much.