NationTweaker is a free Chrome add-on developed by Effy Elden. It falls under the category of Browsers and specifically the subcategory of Add-ons & Tools. This program provides a range of tweaks, fixes, and enhancements for the NationBuilder campaign platform, allowing users to optimize their campaigns.

With NationTweaker, users can take advantage of various current tweaks such as enabling email re-opt-in, sorting people tags alphabetically, fixing the attendees link on the event dashboard, and making page tags link to the page tag view. Additionally, users can hide social capital, allow the removal of the point person from volunteers, and make path names on the person view clickable. Furthermore, the program offers the option to uncheck 'add to top nav' by default on new pages.

In the latest version, NationTweaker introduces new tweaks to enhance the user experience. These include enlarging the email preview to full-width, enlarging the email composer window, and enlarging the code editor window. Moreover, the update addresses a bug where clicking on people in the second or subsequent pages of results breaks their activity stream. Additionally, the program hides US states from the filter options.