Upload an image you want to map to the Apple II HGR2 high resolution graphics mode as an overlaid grid.
HGR2 resolution is 280 x 192. Upload an image with a 7:5 aspect ratio for best results.
If you prefer, you can run the app locally by cloning the repo and doing a local Svelte build: https://github.com/danielbhansen/svelte-apple-ii-hgr-grid