Công cụ trực tuyến miễn phí
268+ free online tools for PDF, images, SEO, developers, color, and productivity. Fast, browser-based, and private — no signup, no installs, no limits. Search above or browse by category below.
Total tools26810.8K total uses
Categories13Active categories
Most usedJSON Formatter4.1K uses
Recently addedExperiment RandomizerNewest tool
Used 0 times•Updated never
HEX to HSL
Convert HEX color codes to HSL and HSLA values with hue, saturation, lightness, and a live preview.
Used 0 times•Updated never
RGB to CMYK
Convert RGB screen colors to CMYK print values with cyan, magenta, yellow, and key (black) percentages.
Used 0 times•Updated never
CMYK to RGB
Convert CMYK print color values to on-screen RGB and HEX for web and digital design.
Used 0 times•Updated never
Color Contrast Checker
Check WCAG contrast ratios between text and background colors for accessibility compliance.
Used 0 times•Updated never
Gradient Generator
Build linear and radial CSS gradients with multiple color stops, live preview, and copy-ready code.
Used 0 times•Updated never
Color Blindness Simulator
Preview how colors and images appear under protanopia, deuteranopia, tritanopia, and other color vision deficiencies.
Used 0 times•Updated never
Brand Color Extractor
Upload a logo or brand image to extract dominant colors with HEX, RGB, and CSS variable exports.
Used 0 times•Updated never
Color Palette Extractor
Extract a color palette from any image with sortable swatches and copy-ready HEX, JSON, CSS gradient, and SVG exports.
Used 0 times•Updated never
Random Color Generator
Generate random HEX colors and palettes in random, pastel, vibrant, dark, light, or muted styles.
Used 0 times•Updated never
Tailwind Color Generator
Generate a full Tailwind CSS shade scale (50–950) from a base color with copy-ready v3 config and v4 @theme exports.
Used 0 times•Updated never
Color Mixer
Blend two or more HEX colors with adjustable weights using RGB or HSL mixing and copy the mixed result.
Used 0 times•Updated never