速卖通称重和运费校验 is a Chrome add-on developed by 清明雨上. It is a free tool in the Browsers category, specifically in the Add-ons & Tools subcategory.

This add-on allows users to retrieve the billing weight and actual shipping fee of packages on 速卖通 (also known as AliExpress), and automatically determines if 速卖通 has overweighed the package or charged excessive shipping fees. It also provides an automatic calculation of the eligible compensation amount based on the actual weight.

With 速卖通称重和运费校验, users can easily verify the accuracy of package weight and shipping fees on 速卖通, ensuring fair and transparent transactions. This add-on provides a convenient solution for users who frequently make purchases on 速卖通 and want to avoid potential overcharges.

Please note that this add-on is designed specifically for Chrome users and requires the installation of the Chrome browser to be used.