The Un-Tumblr is a free Chrome add-on developed by Sam Ruston. It falls under the category of browsers and specifically the subcategory of add-ons and tools. This add-on aims to bring back the old reblog layout on Tumblr.

With The Un-Tumblr, users can enjoy the classic reblog layout that was available on Tumblr before the platform introduced its new design. This add-on allows users to revert to the old layout, providing a familiar and comfortable experience for those who prefer the previous version.

By installing this Chrome extension, users can easily switch back to the old reblog layout and enjoy the simplicity and familiarity it offers. The Un-Tumblr is a great option for Tumblr users who prefer the old design and want to continue using it.