CssBox Studio
Fast, privacy-focused online developer utilities. 100% browser-based with zero server lag.
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CSS Box Shadow Generator & Multi-Layer Shadow Studio
Design realistic, layered CSS box shadows with interactive sliders for blur, spread, offsets, and inset shadows, plus one-click CSS and Tailwind copy.
CSS Gradient Generator (Linear, Radial & Conic Palettes)
Create smooth linear, radial, and conic gradients with interactive color stops, degree angle dials, curated color presets, and instant CSS export.
WCAG 2.1 Color Contrast Ratio Checker (AA & AAA Standards)
Verify foreground and background color contrast ratios in accordance with WCAG 2.1 AA and AAA web accessibility compliance guidelines.
PX to REM & EM Responsive Unit Converter
Convert pixels to REM, EM, and viewport units bidirectionally with customizable root font sizes (16px base) and instant CSS rules generation.
SVG to CSS Data URI & Base64 Background Converter
Clean, URL-encode, and transform raw SVG code or SVG files into lightweight CSS background-image Data URIs and Base64 strings with live visual preview.