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From Wikipedia, the free encyclopedia
Original author(s)Magnus Manske
Written inRust

PetScan (previously CatScan) is an external tool that searches an article category (and its subcategories) according to specified criteria to find articles, stubs, images, and categories. It can also be used for finding all articles that belong to two specified categories (the intersection). CatScan was developed by the German Wikipedian Duesentrieb and is run on Cloud VPS, as part of Wikimedia Foundation's cloud computing environment.[1] The tool has been rewritten three times by Magnus Manske, first in PHP, then in C++, finally in Rust.


Uses and ideas[edit]

A few examples of how the English Wikipedia uses PetScan:

  • finding articles for deletion sorting, example
  • finding articles for an educational project (class): search for stubs within a category corresponding to the class subject
  • finding certain articles with a certain template, e.g. featured articles containing the template {{citation needed}} (see box below)
  • find short articles to expand – For example, Category tab: Aviation stubs; Output tab: Sort: (x) by size.

See also[edit]


  1. ^ Until 2014 most tools were run on the toolserver, a previous service provided by Wikimedia Deutschland e.V.