Input a IIIF manifest.json link to and the desired image size to download a ZIP or PDF of all that manifest's images.
Please note that this tool runs entirely in your browser, so you need to keep the tab active while your download is in progress. For large requests, it may take several minutes. I hope to change this soon, but in the meantime use it as an opportunity to get up, stretch, and have a drink of water.
"Ugh, an ad? Seriously?" Yeah... sorry about that. I'm a poor grad student & I've got to keep the server running somehow!