Convert colors between HEX, RGB, HSL, HSV, CMYK, XYZ, and LAB formats. Bi-directional conversion with live color preview as you type.
Convert between decimal numbers and Roman numerals instantly. Supports numbers from 1 to 3,999,999 with proper notation and random number generation for practice.
Calculate monthly payments, total interest, and view a full amortization schedule for any loan. Supports fixed-rate mortgages, auto loans, and personal loans.
Create professional PDF invoices instantly — no signup, no watermarks. Add your details, line items, tax rates, and download a clean invoice ready to send.
