Screenshot

4chan X is an unofficial script written by users of 4chan to add various features to the site.

It was previously developed by aeosynth, Mayhem, ihavenoface, Zixaphir, Seaweed, and Spittie, with contributions from many others.

If you're looking for a maintained fork of OneeChan (a style script used in addition to 4chan X), try https://github.com/Nebukazar/OneeChan.

Please note

Uninstalling: 4chan X disables the native extension, so if you uninstall 4chan X, you'll need to re-enable it. To do this, click the [Settings] link in the top right corner, uncheck "Disable the native extension" in the panel that appears, and click the "Save Settings" button. If you don't see a "Save Settings" button, it may be being hidden by your ad blocker.

Private browsing: 4chan X does not yet support private browsing / incognito mode. Although it may work in this mode, browsing data recorded by 4chan X, such as your last read post in a thread and which posts are yours, will still need to be cleared manually by resetting your settings. To control what browsing data 4chan X records, use the Remember Last Read Post and Remember Your Posts options in the settings panel.

HTTPS: 4chan X currently shares your settings and post history between the HTTP and HTTPS versions of 4chan. If you are concerned about protecting your privacy against a man-in-the-middle attack, you should disable 4chan X on the HTTP version of 4chan and/or install HTTPS Everywhere.

Install

Install Greasemonkey, then click here to install 4chan X.

Ports of Greasemonkey are available for SeaMonkey and Pale Moon.

Userscript: Install Violentmonkey (Opera store / Chrome store) or Tampermonkey, then click here to install 4chan X.

Chrome extension: 4chan X is also available as a standalone Chrome extension. The Chrome extension has the additional feature of being able to sync your settings and data with other devices via Chrome Sync. But there is an issue when the script updates: Whenever the Chrome extension is updated, until you hard refresh (F5) the tab, 4chan X is unable to save any data (such as posts marked as yours and settings changes). The userscript version above does not have this problem when 4chan X updates, only when Violentmonkey / Tampermonkey is updated. To install as a Chrome extension:

Note: This version of 4chan X does not work with Opera 12. If you need Opera 12 support, try loadletter's fork instead.

Install JS Blocker or Tampermonkey, then click here to install 4chan X.

Several WebKitGTK+ based browsers have support for userscripts and can run 4chan X. Due to the lack of the cross-site GM_* API, and lack of support for userscripts in iframes, not all features will work. You may experience crashes when repeatedly solving the default image-based captchas. You can avoid this problem by enabling Use Recaptcha v1 in your settings.

Install Tampermonkey, then click here to install 4chan X.

4chan X can be used in some browsers that do not support userscripts using a local proxy. Not all features will work.

Beta version

New features and non-urgent bugfixes are released on the beta channel for further testing before they are moved the stable version. Please report any issues you find, and be sure to mention which version you're using. You should back up your settings regularly to prevent them from being lost due to bugs.

To install the beta version and get updates whenever there's a new beta version:

To install the current beta version but get updates from the stable channel (for example, if just you want a particular recent feature):

Troubleshooting

If you encounter a bug, try the steps here, then report it to the issue tracker. You can report bugs without a Github account via this form. If the bug seems to be caused by a script update, you can install a old version from the changelog.