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RedWarn Wordmark (for bright backgrounds).svg
Author(s)See WP:RedWarn#Credits
First releasedApril 24, 2020; 7 months ago (2020-04-24)
VersionRedWarn 16
UpdatedNovember 8, 2020; 17 days ago (2020-11-08)
Browser supportMost newer browsers, excluding Safari and IE
Skin supportAll Skins Supported
GitLab repositoryredwarn-web on GitLab

RedWarn (a backronym of recent edits patrol and warning tool) is a JavaScript counter-vandalism tool, designed to be a user-friendly way to perform common moderation tasks.

Changes in the latest release


You can use RedWarn by interacting with the icons at the top of a page, or in the sidebar, depending on your preferences and skin.

Easy to use: Modern, user-friendly UI

Unlike other tools, RedWarn uses easy to interpret icons and simple summaries for common actions, reducing both learning and reading times. If you're unsure about what an icon does, just hover over it with your cursor. In addition, RedWarn uses Google's Material Design language to improve user experience.


RedWarn provides a number of customisation features. Easily customise behaviour, icons and many other options to suit you.


RedWarn's default rollback icons

RedWarn is built for speed. Large UI elements reduce misclicking. When you rollback using RedWarn, you are not sent to a different page to warn the user, instead, RedWarn automatically opens a dialog to allow you to warn the user. RedWarn can automatically select a warning level and, on vandalism and content removal rollbacks, automatically select a warning template.

Extended functionality

Unlike Twinkle, which only supports three rollback methods, RedWarn provides nearly 20 quick rollback reasons, all of which will automatically set both a rollback reason and a warning for the user.

Supports rollback and rollback-like functionality

Unlike Twinkle, RedWarn supports both rollback and rollback-like functionality for users with rollback permissions. This significantly decreases waiting times during rollbacks.

You can change your rollback method under RedWarn Preferences > Behaviour > Rollback Method. Please note that you can only change your rollback behavior if you are a rollbacker.

Alerts on new changes

Enabling RedWarn’s “Alert on Change” feature will automatically send you to the latest edit when a new edit occurs on a specific article – and if you’re working on something else, RedWarn will send you a notification while the tab is still open in the background. No time wasted. You can also use the “Latest Revision” button to quickly load the diff page for the latest revision.

Rollback from contributions pages without going anywhere

Unlike Twinkle, you can rollback edits from a contribution page without being sent to a different page – RedWarn does it quickly and easily in one click.

Rollback previews

If you’re ever worried about the changes a rollback will make, especially in the case of reverting good faith edits, you can click the preview rollback button to preview the difference a rollback will make, with the version that will be restored on the right, and the latest revision on the left.

Know what action to take

RedWarn detects the user’s last warning level and automatically selects the new notice level accordingly.

The icon next to the notice target will show you the highest warning the user has received this month. RedWarn will also automatically select a warning level based on this.

Don't like automatic warning and reason selection? Disable the right-click menu under RedWarn Preferences > Behaviour > New Notice auto-select level

Select a related page from a list of recent pages

If you’ve traversed through multiple pages to warn a user, you can select the related page from a list of your 20 recently visited pages. This data is stored offline on your computer only, and is never shared publicly.

Instant previews with ‘X-Ray’

Always know what notice you are going to send. The preview updates as you change the notice parameters, reducing errors and overly harsh messages. You can also click the pencil or eye icon next to any Wikitext preview input to switch between a preview and directly editing the underlying Wikitext.

Review Pending Changes

With RedWarn, you can review pending changes and notify users of their errors during a revert so that good faith editors can improve their reverted edits.

Trust and Safety and Oversight Reports

With RedWarn, you can immediately report edits or users to either Oversight or Wikimedia Trust and Safety.

RedWarn Patrol

  • RedWarn Patrol is a recent changes patrol tool that will always take you to the latest revision of a page.
  • To launch, visit Special:RecentChanges, apply the filters you like as usual, then click the patrol button at the top of the page.
  • Once opened, click “Open New Attached Tab” – this will open a new tab attached to RedWarn patrol that will load the latest revision of the page you select. You can arrange this tab however you like –open it in a new window on most browsers by clicking and dragging the tab down. You can then move this to appear side-by-side or place it on another monitor. The choice is yours.
  • While your cursor is inside the ‘live update’ box, you will receive live updates, which stop as soon as your cursor leaves the box.
  • The stronger the colour, the more the size difference. You can change these colours in your preferences.

Built on your feedback

RedWarn is receiving frequent feature additions and changes based on your feedback. If there’s something you don’t like, or, something you'd like to see, just say on the talkpage!


RedWarn is still in beta, so you may face some bugs and issues. Please be willing to give your feedback if you try in order so that the developers can collect feedback on suggested features, bugs and other issues. The current version of RedWarn can (and should) run alongside Twinkle, as RedWarn does not have a complete feature set at the moment - but this gap is closing with every update.

Want to chat with other RedWarn users and help contribute to the project? Join our Discord Server.

RedWarn is currently receiving frequent bug fixes and feature additions - to see the latest changes, visit the BugSquasher. Please report bugs in the talk page so they can be fixed as soon as possible.


It's easy to get started with RedWarn. Unlike other anti-vandalism programs, it only takes a moment to get started. There's no setup, no download, no installation and no executables. It runs on Windows, macOS, Chrome OS, Linux and more, and can be installed and used by any autoconfirmed user.

RedWarn is powered by Wikimedia Toolforge

YouTube Video - How to Install RedWarn

RedWarn - How to Install on YouTube

Manual method

If you do not want to enable or use Script Installer, just add this line to your common.js file (click here to edit):



RedWarns documentation can be found at Wikipedia:RedWarn/Documentation and related subpages. If you feel that something is missing please let us know on the talk page.


Do not forget that you are responsible for all edits made with RedWarn. You have the chance to review every action you make. You must use this tool within Wikipedia's policies and guidelines or risk being blocked from editing.

Discouraged behaviour

RedWarn is a powerful tool, and some behaviour is strongly discouraged, including but not limited to:

  • Misusing the alert on change option to violate WP:OWN or WP:EW.
  • Misusing the multiple action tool or the rw.multiAct API to violate Wikipedia's bot policy.
  • Consistently misusing UW templates
  • Overuse of a single quick rollback reason which may discourage newer editors
  • Bypassing any permission level restriction (i.e. using RedWarn before autoconfirmed, or using restricted features (such as the multiple-action tool) before becoming extended-confirmed)

A disclaimer regarding rollback

With any semi-automated tool, whether you use rollback (tagged as "Rollback, RedWarn") or pseudo-rollback (tagged as "Undo/revert, RedWarn") does not imply abuse; cases of abuse should be treated differently. WP:ROLLBACKUSE applies only to standard rollback, i.e. the use of the built in "rollback" link feature. "If a tool or manual method is used to add an appropriate explanatory edit summary, then rollback may be freely used as with any other method of reverting."[disputed ]

Help & Feedback

Please leave all bug reports and general feedback on the talk page, or use the "Feedback and Support" button within RedWarn. If you need any extra help, ask away there too.

It would be much appreciated if you could help build RedWarn's documentation at find additional help at Wikipedia:RedWarn/Documentation. Thank you for testing RedWarn!


Bugs very much exist even if the tool is usable. We need your help and feedback to help improve RedWarn!

If you'd like to learn RW's interface, try it out User:Sandbox for user warnings. Once you get the hang of it, you'll be fighting against vandalism quickly and easily. Your immediate and continued feedback would be greatly appreciated.

Extending and developing

You can find work in progress API documentation at

More information

Browser support

RedWarn supports the latest versions of all major Chromium and Mozilla based browsers (Chrome, Firefox, Opera, ext.), along with newer versions of Microsoft Edge. RedWarn is not supported on Internet Explorer or Safari.

The issue with Safari support is due to Apple's constant lack of support for some newer web APIs. While some features may work, it is unlikely RedWarn will work as expected, as on another browser.

ECMAScript 6 support

RedWarn requires a browser that supports ECMAScript 6. If you cannot access a suitable modern browser then, unfortunately, RedWarn will not work.

Very slow internet connections

When Wikipedia or your internet is particularly slow, RedWarn may feel slow and/or sluggish. This is normal behaviour and your actions are being processed, RedWarn is just waiting on Wikipedia. If something goes wrong, RedWarn will notify you.

Other wikis

At this point in time, RedWarn only supports the English Wikipedia. There are plans to add support for any Wiki running MediaWiki in the future.


Official RedWarn development team

Everyone on the RedWarn team engage actively in developer discussion, and contributes greatly to the project in their own way by developing, designing, maintaining, and creating documentation for RedWarn. Users highlighted in bold are members of the core RedWarn team and are identified and trusted to handle confidential issues:

Additional credits

RedWarn Tools


Preview Template
RWThis user uses RedWarn to fight vandalism.

{{User:UBX/RedWarn userbox}}
NotoemojiCowboy.pngThis user uses RedWarn for the quickest vandalism reverts in the west (yee-haw!)

{{User:UBX/RedWarn yeehaw}}
RWThis user uses RedWarn to review pending changes.

{{User:UBX/RedWarn pending}}
Police man Twinkle Head.svgThis user has both RedWarn and Twinkle, and may use them together!RW
{{User:UBX/RW and TW}}
RWThis user has both RedWarn and Huggle, and may use them together!Huggle 3 icon.svg
{{User:UBX/RW and Huggle}}

For a topicon, add {{RedWarn topicon}} to your userpage.

Other RedWarn Links