XbrWasm is free for noncommercial use and select commercial use, and can be purchased for other commercial uses, subject to the license agreement.
See also: Online XBR Pixel Art Upscaler to upscale pixel art in the browser, and Pixelated.js for a JS library to automatically scale images on a web page.
Real-time Video Live Demo
(Note: May not work with some mobile browsers. Other mobile browsers will pause the above video element if it scrolls off-screen, thus pausing the upscaled video.)
Real-Time Video Code
Still Images Live Demo
Still Images Code
The imagery on this page is copyright (c) Nintendo, and is used solely for demonstration purposes.