Online tools · UK
4devskit
Generate and validate UK documents in seconds. Fast, free, and 100% in your browser — ideal for development and testing.
10 generators6 validators
Generators
- NINO GeneratorGenerate UK National Insurance Numbers with valid format.
- VAT GeneratorGenerate GB VAT numbers with a valid checksum.
- Postcode GeneratorGenerate UK-format postcodes for forms and mocks.
- Sort Code GeneratorGenerate 6-digit UK bank sort codes.
- Credit Card GeneratorGenerate fictional cards that pass the Luhn check.
- Password GeneratorGenerate strong passwords with composition options.
- Random Number GeneratorDraw random numbers with range and quantity controls.
- Lorem Ipsum GeneratorGenerate placeholder text for layouts and mockups.
- Fancy Text GeneratorConvert text into Unicode fancy styles.
- Symbols to CopyCopy arrows, currency signs, and special characters.
Validators
- NINO ValidatorValidate National Insurance Number format and prefix rules.
- VAT ValidatorValidate GB VAT numbers with the HMRC checksum.
- Postcode ValidatorValidate common UK postcode patterns.
- Sort Code ValidatorValidate 6-digit UK sort codes.
- Credit Card ValidatorValidate cards with Luhn and detect the brand.
- Password Strength CheckerRate password strength as weak, medium, or strong.