AmazonToCalil is a Chrome add-on developed by u-hossy. It falls under the category of Browsers and specifically the subcategory of Add-ons & Tools. This free extension adds a Calil button to book pages on Amazon.jp and Amazon.com.

The main purpose of AmazonToCalil is to provide users with a convenient way to check if a book is available for borrowing at a library. By clicking on the Calil button, users can quickly access information about the book's availability in various libraries.

The latest update, version 1.0.2, addresses a bug where the button was not being displayed. Additionally, versionintroduces support for books with ISBN codes that include an "X". Overall, AmazonToCalil is a useful tool for book enthusiasts who want to easily find out if a book can be borrowed from a library.