Apply stylized two-tone color grading using shadow and highlight luminance mapping.
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.
Select your image file.
Select a preset (Cyberpunk, Spotify, Sunset) or pick custom shadow/highlight colors.
Fine-tune the duotone opacity.
Download your duotone graphic.
It maps dark pixels to shadow colors and light pixels to highlight colors.
Yes, all pixel computations execute in-browser with zero network calls.
Zero-egress companion tools in the Image Processing suite
Convert and compress WebP, PNG, and JPEG images locally with zero server uploads.
Clean, minify, and sanitize SVG files and markup locally.
Generate multi-size web, Apple Touch, and Android PWA favicons instantly.
