Other
Other useful tools that do not fit into another category.
Roman Numerals
Convert Arabic numbers to Roman numerals and back for free — supports values from 1 to 3999, everything runs directly in your browser, no sign-up needed.
NATO Alphabet
Spell any text using the NATO phonetic alphabet letter by letter — free online, perfect for error-free verbal communication over the phone or radio.
IBAN Validator
Validate an IBAN (checksum + length), format it, and split it into bank code and account number — all in your browser.