netpbm scales and converts GIF, JPEG and PNG images asynchronously, without running out of memory, even if the original image is very large. It does this via the netpbm utilities, a classic package of simple Unix tools that convert image formats and perform operations row-by-row so that memory is not exhausted.

All implicit conversions are done using floating point, so no precision is lost due to rounding errors when converting between color spaces.

Major Features

• RGB, HSV, HSL and CMYK color space implementations
• Alpha channel
• Extensible architecture - implement your own color spaces easily
• Chainable color manipulation
• Seamless conversion between color spaces on demand
• Outputs as Hex, RGB or HSV in css syntax with or without alpha channel

The code is fully documented, and you can use JSdoc to build the documentation.