Online tools · JP
4devskit
Generate and validate Japanese documents in seconds. Fast, free, and 100% in your browser — ideal for development and testing.
9 generators5 validators
Generators
- My Number GeneratorGenerate Japanese My Numbers with check digit.
- Corporate Number GeneratorGenerate Japanese corporate numbers with check digit.
- Postal Code GeneratorGenerate Japanese postal codes (XXX-XXXX).
- 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 for bios, titles, and mock content.
- Symbols to CopyCopy arrows, currency signs, and special characters for UI and content work.
Validators
- My Number ValidatorValidate Japanese My Number check digits.
- Corporate Number ValidatorValidate Japanese corporate number check digits.
- Postal Code ValidatorValidate Japanese postal codes.
- Credit Card ValidatorValidate card numbers with the Luhn algorithm and detect the card brand.
- Password Strength CheckerRate password strength as weak, medium, or strong for signup and QA flows.