AO3 Kudos-Per-Hit Ratios is a free Chrome add-on developed by Mooglegirl. This add-on enhances the stats section of Archive of Our Own (AO3) fics by adding kudos-per-hit ratios. With this add-on, users can now see the percentage of readers who gave kudos to a fic, right after the Hits count.

One of the main features of AO3 Kudos-Per-Hit Ratios is the customizable bar that provides a visual representation of how different fics stack up in terms of quality. This visual aid allows users to easily compare the quality of fics, regardless of the number of views they have.

It is important to note that this add-on does not work for fics that have either Kudos or Hits hidden. However, for fics that have these stats visible, AO3 Kudos-Per-Hit Ratios provides valuable insights into reader engagement and fic popularity.

Overall, AO3 Kudos-Per-Hit Ratios is a useful tool for AO3 users who want to gain a better understanding of the kudos-per-hit ratio of fics and make informed decisions when choosing what to read.