The idea for this site started in 2013, when a friend was trying to go back and retag her old Tumblr posts. Without a way to easily see all her untagged posts, it was impossible for her to be sure that she was done. I wrote her a Python script to get the job done, and that was that.
In 2014, I was getting a lot of hits to that post, but a Python script isn’t very user friendly. I wrote this site to be an easier way to get a list of your untagged posts, because clearly it was something people wanted.
All the source code is on GitHub, and released under the MIT license.
This site is written by me, alexwlchan, and you can learn more about me on my personal site.