arrow_back All tools

history_edu

Roman Numerals

Convert Roman numerals to numbers and back.

Number

Roman

info

Standard subtractive notation from 1 to 3999. Input is validated both ways, so IIII and MMMM are rejected rather than quietly accepted.

Other tools

Turn a spreadsheet export into objects, and back.

Read a config file as JSON, or write one from it.

Binary, octal, decimal and hex, all at once.

camelCase, snake_case, kebab-case and slugs.