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WikiLoop DoubleCheck is an open-source, crowd-sourced, counter-vandalism tool for Wikipedia and Built on web technology, WikiLoop DoubleCheck allows a quick launch from either desktop or mobile phone without needing to install resident software. Its objective is to reduce the barrier for Wikipedians to wish to assist in patrolling Wikipedia revisions.

Different from other tools like STiki and Huggle, which both require WP:Rollback permission to start using, WikiLoop DoubleCheck intends to move to a tiered, trusted model. That is, just like Wikipedia aspires to be something "anyone can edit", with tiered assets allocated to tiered users, WikiLoop DoubleCheck explores how to grant everyone an ability to review and label a revision with their opinion, while allowing higher-tiered (trusted) editors (such as admins or those with WP:Rollback permissions) to conduct faster and more powerful actions (like direct-revert, e.g.) with the tool. It allows anonymous users or less-experienced (or not-yet-trusted) users to review and conduct actions with lower risks, while gradually building up their credit using the tool.

Visit WikiLoop DoubleCheck web app to start reviewing content on Wikipedia. For the direct-revert feature which is available to more experienced editors, visit DoubleCheck on WMF Labs, which is hosted on the Wikimedia Foundation's Cloud VPS.


The WikiLoop DoubleCheck is a collaborative web-based application for marking a revision as vandalism. It contains the following major features:

  • Subscribe to the recent change feed
  • Watch the diff directly on the page.
  • Mark a revision as "Looks Good", "Not Sure", "Should Revert"
  • Directly redirect to a WP URL, within 1-click to revert a vandal edits.
  • Seeing how many revisions the current user have reviewed (based on a random session ID in m:Cookie) at API /api/stats
  • Seeing how many revisions all users have collaboratively reviewed at endpoint /marked
  • Download the reviewed revision IDs and review result in a CSV.

Issues can be reported on the GitHub page.

Future plans[edit]

  • Support integration with continuous translation services to allow future update and improvements on translations.
  • Improve the developer productivity for our code contributors
  • Add better diff view include extracting URL, spelling check, image thumbnails etc., WikiLink detection, to improve our reviewer productivity
  • Create a tiered trust model based on [:en:Wikipedia:User_access_levels] so we can offer more powerful functionalities to those more trusted by the community while lower the barrier to allow everyone, including anonymous users to contribute their reviewing.
  • Support the open knowledge researchers and developers by offering labelled all data generated from WikiLoop DoubleCheck, who may find the data useful for training quality and vandalism detection models.

How to support this tool[edit]

  • First and foremost, review Wikipedia edits on our tool, particularly on the language you speak and the topics you are mostly interested in / familiar with.
  • tell more of your Wikipedian friends about us
  • translation
  • become a code contributor, contribute code on, soon to be
  • Visual Designer: help us design a logo for this tool WikiLoop DoubleCheck and the Project WikiLoop in general.
  • UX / Product Designer: join our open source efforts in designing the UX

Contributors Signup[edit]

If you are interested in Project WikiLoop, want to follow its latest development, news, or try out its tools and datasets, or even better if you want to help the project, you are welcome to sign your Username here:

English Wikipedia editors[edit]

Taken from the tool page on English Wikipedia.

Software Developers[edit]

Please add your name here and remember to star/fork our [git repo].

Artificial Intelligence Researchers[edit]