Generate strong passwords, convert units, calculate loans and finances, and boost productivity.
Upload multiple files and download them as a compressed ZIP archive.
Convert units (length, weight, temp) and current exchange rates.
Create highly secure passwords with customizable rules.
Encrypt and decode texts (Base64, SHA256).
Calculate your weight in space or the volumetric weight for shipping.
Validate and calculate IBANs for DE and ES (client-side only).
Check the security of your passwords instantly (client-side only).
Convert HEX, RGB, HSL, and CMYK colors accurately and test WCAG accessibility contrast ratios.
Free online percentage calculator: calculate percentage values, fractions, percentage change, and discounts instantly.
Calculate your wealth growth with compound interest, monthly contributions, and a visual year-by-year breakdown table.
Free online date calculator: calculate exact age, count days & working days between dates, or add/subtract days for deadlines.
Free fuel cost calculator: calculate fuel consumption, total trip costs, and fair expense sharing per passenger.
Free BMI calculator: calculate Body Mass Index, healthy weight range, Basal Metabolic Rate (BMR), and daily calories.
Free loan calculator: calculate monthly payments, total interest, remaining balance, and amortization schedule.
Compare world time zones, convert times live, and find ideal overlapping business hours for global conference calls.