Grainrad

Grainrad is a browser-based image and video effects tool powered by WebGPU. Drop in a PNG, JPG, GIF, MP4, WebM, or even a GLB 3D model and apply from a deep menu of effects: ASCII, Dithering, Halftone, Matrix Rain, Dots, Contour, Pixel Sort, Blockify, Threshold, Edge Detection, Crosshatch, Wave Lines, Noise Field, Voronoi, and VHS. Each effect has granular settings (levels, threshold, dither, invert) plus global adjustments for brightness, contrast, and color mode (mono/multi).

Export in PNG, JPEG, GIF, MP4 video, SVG, plain text, and even a Three.js HTML file. It includes presets, post-processing pipeline, and runs entirely in the browser via WebGPU.