Program for downloading images automatically

Hi!
 
Does anyone know a good program that can autoamtically download images from web pages?  
(such as Derpibooru, Deviantart, pixiv, Danbooru/Gelbooru etc)
 
I lost all of my images when my computer crashed, it was the largest collection of images that I’ve ever had stored on my computer…. and unfortunately I never made a backup… so I need a quick solution how to get all the images back. And since I don’t have the time to browse the entire galleries again, I need asoftware to do that for me.
 
I have already tried dozens of “image downlaoder” programs but they always only download the thumbnails of the images, but I need the original size of the images.
 
Also, it needs to be a program that can filter a specific search name/tag name so that it only downloads images related to that specific search name. (I don’t need all unrelated images, only a specific category of images with a specific search name (tag name).
 
Bizarrely though, the “Bulk Image Downlaoder” does work on Deviantart just perfectly, it can download all images of a specific search name, but it doesn’t work on derpibooru/Danbooru/pixiv.
 
So I need another tool for Derpibooru/pixiv etc… what should I do?

For mass downloading pics off of Derpibooru, use this.

Sorry, I’m not used to Java scripting language. After reading the whole textwall I’m still as clueless as before. How can this help me to save all images of a specified search name very quick? It confuses me.

@Background Pony #03E5  
I’d suggest asking in the Site and Policy forum for json and API advice.

Ok, thanks anyway, I can need any kind of useful information.
 
But I wonder, isn’t there another option? For example a torrent of all safe images on Derpibooru? Or at least just of a specific pony character on Derpibooru. I’m still downloading the torrent of all the safe PONIBOORU…

@Background Pony #03E5  
Because the fact that the site’s constantly updated? And we’ve long gone past PB in terms of images.

But why can we not discuss JSON and API here in this thread? If you know how JSON and API work, please do tell me how to use it. Alternatively, i also started a new thread in the Site and Policy forum, although I don’t see the point in it, if we could just discuss it here in this thread. Also no response appears in that thread :|

is there maybe any script for JDownloader 2 who allows you to download all full res pics from every specific Tag or Tags?

I want to offer an alternative to current programs for downloading images from this site.  
https://github.com/Rain0Ash/Derpi-Downloader  
Differences from analogues:
 
It is able to sort images by directories according to your request and internal variables (for example, id, artist, uploader, hash, size, etc).  
For example: C:\Downloads{artist}{name}.{Ext}
 
Able to download multiple requests at a time (currently 5)
 
The program has English, Russian and partially German localization (If desired, it is easily localized to other languages).
 
Good GUI interface on WinForms
 
In the future, new features will be added: finding duplicate images and creating derpibooru watch list by already downloaded images
 
Disadvantages:  
Currently under development and may contain bugs (may not find images on request / crash). But on standard cases this is unlikely.  
Developed as far as possible.
 
 
Powered by C# 8 + dotNet 4.7.2  
P.S. GitHub stars are welcome.  
P.S.S. Ideas, error messages and crash logs and a description of actions are also welcome.

@Background Pony #093E  
How do I start this program?  
Theres no EXE!

@PoniesMemes  
https://github.com/Rain0Ash/Derpi-Downloader/releases  
Download last release, then unpack and run program. Program is self-hosted.

@evgeni721  
How do I get my API Key?