Usually I use IQDB to check if what I want to upload has already been uploaded. This past week IQDB has been down so I want to know if there is any alternatives that cover wide range of japan 2D-based site (like boorus, sankaku, 0chan).
I mostly reupload from Pixiv and although the bookmarklet can find similar pic, it doesn’t work if I upload the pic directly using upload form (in case I have a picture that got deleted by the artist).