Kanjidrag is a free Chrome add-on developed by Skandalabrandur. It falls under the category of Browsers and is specifically categorized as an Add-ons & Tools subcategory. This add-on provides a unique feature that allows users to easily detect and view the relevant keywords from the Heisig's RTK index.

With Kanjidrag, users can simply select any text on a website and if any Kanji characters from the Heisig's RTK index are detected, a box will appear at the cursor location for 3 seconds. This box displays the relevant Kanji characters along with their corresponding keywords.

This add-on is particularly useful for those learning Japanese and using the Remembering the Kanji (RTK) method. It helps users quickly identify and understand the meaning of Kanji characters encountered while browsing the web. Kanjidrag simplifies the process of looking up keywords and enhances the learning experience for Japanese language learners.

Overall, Kanjidrag is a valuable Chrome add-on for individuals studying Kanji and seeking a convenient way to access RTK keywords while browsing the internet.