Convert colors, generate gradients, check contrast and build accessible palettes — free design tools in your browser.
Everything a student needs to stay on top of grades, deadlines and study time — free online calculators that run right in your browser with no registration.
Run your freelance business like a pro: generate professional invoices, price your time correctly, and understand taxes and fees — all with free tools.
A growing toolbox for developers: format, validate and convert code, build regex patterns, generate UUIDs and commit messages — fast, private and free.
Understand your body and plan your fitness journey with accurate, free calculators for BMI, daily calories, TDEE, body fat and hydration.
The color converter and dedicated HEX↔RGB tools convert instantly between HEX, RGB, HSL and other formats.
The contrast checker computes WCAG contrast ratios and tells you if your colors meet accessibility standards.
Yes. The gradient generator creates CSS gradients with multiple stops and copies the code for your projects.
Yes. The contrast checker and color blindness simulator help you design accessible, inclusive interfaces.