Sketch Master is a free, standalone, browser-based digital drawing application created by Charlie Shine, Ph.D., Brain Scientist at brains4goodlife.com. It requires no installation and works entirely offline as a single HTML file.
Key features include: freehand brush drawing with adjustable brush size, eraser with optional color-blending mode, zoom and pan via mouse wheel or pinch gesture, rectangle and triangle area selection, area effects including darken, lighten and clear, a global brightness threshold filter, Sobel-based outline extraction to convert photos into sketches, eight artistic sketch style filters (dots, spiral, circles, lines, crosshatch, wedges, ABC letters, waves), 20-step undo history, image upload and PNG export, and full mobile touch support.
This app is suitable for digital artists, students, educators, hobbyists, and anyone interested in creative brain-stimulating activities. It can be freely downloaded and used offline.
Available in English and Korean. Visit brains4goodlife.com for more free brain health and wellness apps.