Design
Check color contrast ratio and WCAG compliance for accessibility
color-contrast-checkerDesign
Convert colors to grayscale with multiple conversion methods and intensity control
color-grayscale-converterDesign
Shift color hues and create variations with clockwise/counterclockwise hue rotation controls
color-hue-shifterDesign
Invert colors and create negative versions with RGB, HSL, and brightness inversion methods
color-inverterDesign
Adjust color brightness and create variations with lighten/darken controls
color-lighten-darkenDesign
Mix multiple colors together with different blending modes and ratios
color-mixerDesign
Adjust color opacity/alpha transparency with real-time preview and batch processing
color-opacity-adjusterDesign
Adjust color saturation and create variations with saturate/desaturate controls
color-saturate-desaturateDesign
Generate professional color schemes and palettes for design projects
color-scheme-generatorDesign
Apply sepia toning effects to colors with classic, warm, cool, and custom sepia styles
color-sepia-tonerAstronomy
Find visible constellations and zodiac signs for any date
constellation-finderCompression
Convert 7Z archive to GZ format (requires 7zip command)
7z-to-gz-converter