Free Online Design Tools
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Design
1–12 / 24WCAG color contrast
Compute contrast ratio and WCAG 2 AA/AAA text thresholds.
Mix two colors
Mix two colors in encoded sRGB at a chosen proportion.
Color tints and shades
Build equal sRGB steps from black through a color to white.
Color harmony palette
Generate complementary, analogous, triadic or square HSL palettes.
Color vision approximation
Apply simple color-vision simulation matrices; not a medical assessment.
RGB and CMYK converter
Convert RGB hex to unprofiled CMYK percentages.
CSS gradient generator
Generate a validated multi-stop linear gradient.
CSS shadow generator
Generate box or text shadows from validated numeric controls.
CSS corner radius generator
Generate four independent corner radii with a chosen unit.
Fluid font clamp calculator
Interpolate font size between two viewport widths.
Responsive CSS grid generator
Build an auto-fit grid with bounded minimum tile width and gap.
Flexbox layout generator
Generate flex alignment, wrapping and gap properties.
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