Image Grayscale Converter

The tool converts color images to grayscale using multiple methods and applies optional blending to meet design needs. Conceptually, each pixel’s RGB values are mapped to a single luminance value according to a selected formula and blended if requested.
Core methods include luma-based grayscale using Rec. 601/709 weights, simple average, desaturation, and lightness. The luma option yields perceptually accurate grayscale by weighting green most heavily; the average method treats all channels equally; desaturation takes the midpoint across the channels; lightness uses the midrange of channel extremes. Users may enable intensity to blend between the original color and grayscale, preserving color hints at low levels or delivering full grayscale at higher levels. The output preserves alpha when requested and exports in common formats such as PNG for lossless results or JPEG for smaller file sizes.
This tool is useful for photographers preparing monochrome proofs, designers creating grayscale assets for accessibility testing, and developers integrating a grayscale export step into workflows. Unique value comes from support for multiple grayscale strategies, alpha preservation, and a simple online experience that requires no software installation.