I've made an interactive grid (XY-Plot) online viewer!

[aleksusklim]

One-page static HTML, works in browser, can be saved locally:
https://klimaleksus.github.io/xy-plot-online-grid-viewer/xy-plot-online-grid-viewer-v1.htm

Accepts all kind of ways to open image (copy-paste, links, drag-n-drop) and all kind of grids or batches (correctly computing headers' width-height).
The only thing you need to do is to adjust single cell dimensions, default to 512*512.

Can be used to:

• explore a huge grid conveniently
• visually compare pictures in adjacent cells
• seamlessly switch between grids of the same size

Here is a demo video of its interface:

xy-plot-online-grid-viewer-v1.mp4

[aleksusklim]

I've added Space hotkey to quickly switch to another set of file/cell/size/scale! Use Shift+Space to quickly make both stored positions equal to current state.

This is useful for comparing far-away cells on the same image; or to compare one lone image to another grid.