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Ratings for a few popular boorus and links to the page that outlines their definitions. These rat...

MD5 Queries: This will allow you to find tags for files you already have (if the hash value ma...

The copyright: namespace, while used on danbooru and e621, is not recognized on PTR. Use series: ...

Say you have a group of images that you want to represent as being "together" in some way. Either...

This document exists entirely to shame some of the dumb tags that we have seen pushed to PTR. The...

# PTR for Dummies or ## Myths and facts about the Public Tag Repository - [What is the PTR...

If any of this is confusing, a simpler guide is here, and some video guides are here! downloadin...

If any of this is confusing, a simpler guide is here, and some video guides are here! a warning ...

If any of this is confusing, a simpler guide is here, and some video guides are here! how do we ...

downloading The hydrus client has a sophisticated and completely user-customisable download syst...

This document was originally written for when I ran the Public Tag Repository. This is now run by...

Do not try to create a subscription until you are comfortable with a normal gallery download page...

duplicates As files are shared on the internet, they are often resized, cropped, converted to a ...

hydrus is cpu and hdd hungry The hydrus client manages a lot of complicated data and gives you a...

this is non-comprehensive I am always changing and adding little things. The best way to learn i...

quick version Tag siblings let you replace a bad tag with a better tag. what's the problem? Re...

the hydrus database A hydrus client consists of three components: the software installation ...

launch arguments You can launch the program with several different arguments to alter core behav...

client api The hydrus client now supports a very simple API so you can access it with external p...

ipfs IPFS is a p2p protocol that makes it easy to share many sorts of data. The hydrus client ca...