Phasebooru

Extension Manager

NameDocsDescription

Admin
Show a "down for maintenance" page
Use an additional stylesheet on certain holidays
Recount / Rename / Etc

Feature
Allow users to make comments on images
Show a list of uploaded posts

File Handling
Handle JPEG, PNG, GIF, WEBP, etc files
Handle static SVG files.
Allows people to replace files for existing posts
This extension allows admins to resize images.

General
Edit the alias list
Adds autocomplete to search & tagging.
Turns BBCode into HTML
Bring a specific image to the users' attentions
Show various bits of system information

Metadata
Provides several automatic tagging functions
Allow images to have metadata locked
Allow images to have owners assigned to them
Allow users to rate images "safe", "questionable" or "explicit"
Allow users to score images
Allow images to have sources assigned to them
Allow images to have tags assigned to them

Moderation
Adds an approval step to the upload/import process.
For stopping spam and other comment abuse
Ban IP addresses
Redirect users to the rules if they use bad tags
Allows the admin to set min / max image dimensions
Keep a record of tag changes, and allows you to revert changes.