Image Lightbox Gallery — Instructions

A responsive thumbnail grid where clicking a photo opens it large in a dark overlay, with previous/next, captions, click-outside and keyboard (←/→/Esc) controls.

1 · Preview it

Double-click snippet.html to see it working in your browser. It’s plain HTML, CSS & JavaScript — no install, build, or server needed, and no external libraries.

2 · Add it to your site with Claude

Keep this folder inside your website project (or anywhere Claude Code can read it), then ask Claude something like:

“Add the image lightbox gallery from snippet.html in this folder and swap in my own photos.”

“Integrate this lightbox gallery into my Portfolio page using the images in my /images folder.”

Prefer to paste it yourself? Open snippet.html, copy the part you need, and tell Claude: “integrate this into [page], matching my site’s existing styles.”

Tip: point Claude at the file by name — e.g. “use the code in snippet.html from the Image-Lightbox-Gallery folder” — so it references the exact snippet.

3 · Customize

Replace each demo tile with a real image: set the <img src> and the href to your full-size photo, and the data-caption text.
Grid columns adjust automatically; tweak minmax() in .lb-grid to change thumbnail size.

Good to know

No dependencies: works in any site — static HTML, WordPress, React, anything.
Responsive & accessible: built to behave on phones and with keyboards.
Yours to change: tweak the colors and text, or ask Claude to restyle it to your brand.

Prepared by Inner Web SolutionsBuilt with Claude