Design multi-layer CSS box shadows with blur, spread, and inset.
Execution runs 100% locally inside the browser sandbox using HTML5 Canvas, Web Cryptography Subtle API, and Web Workers. Zero egress.
Zero network latency. Operates completely offline with zero dependencies on third-party backend servers or cloud services.
Built according to official RFC specifications, cryptographic test vectors, and enterprise-grade data transformation standards.
Change horizontal and vertical offsets, blur radius, and spread.
Pick shadow color, opacity, and toggle inset mode.
Copy the standard CSS box-shadow property string.
Blur softens and disperses the edge of the shadow, while spread expands or contracts the physical dimensions of the shadow shape.
Zero-egress companion tools in the Color & Palette suite
Generate lightweight CSS linear-gradient checkerboard grids for transparent canvas backgrounds.
Generate high-contrast, low-tension palettes (Base, +150°, +210°) on the 360° color wheel.
Generate modern iOS / macOS frosted glass cards with translucent borders and backdrop blurs.
Generate vibrant 4-color palettes spaced evenly at 90° angles around the color wheel.
