Greasy Fork is available in English.
Shows all pages at once in online view for these sites: Alandal, Batoto, BilibiliComics, ComiCastle, Comick, Dynasty-Scans, INKR, InManga, KLManga, Leitor, LHTranslation, Local Files, LynxScans, MangaBuddy, MangaDex, MangaFox, MangaHere, Mangago, MangaHosted, MangaHub, MangasIn, MangaKakalot, MangaNelo, MangaNato, MangaOni, MangaPark, Mangareader, MangaSee, Manga4life, MangaTigre, MangaToons, MangaTown, ManhuaScan, ManhwaWeb, MangaGeko.com, MangaGeko.cc, NaniScans, NineManga, OlympusScans, Panda
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Currently I can only guarantee it works with png files, it should work with jpg, because it was supposed to be converted to png before adding to the zip file. I'll have to look it up.
Download Images as Zip doesn't work
The Download Images as Zip doesn't work
I get a zip file with empty .png files where the original files are .jpg
using Chrome and the site is fakku.net