PrivateMeter is a free Chrome add-on developed by myprivacyextension. It falls under the category of Browsers and is classified as an Add-ons & Tools subcategory.

PrivateMeter is designed to help users assess the strength of their passwords and provide feedback on their security. The add-on utilizes a neural network as its foundation to calculate a heuristic score for each password entered. This score is then used to generate a feedback message, accompanied by a rating bar.

One of the key features of PrivateMeter is the ability to choose whether the add-on should calculate the strength of existing passwords or not. This allows users to evaluate the security of their current passwords and make necessary changes if required.

In addition, PrivateMeter offers personalization options to ensure that users are not using any personal information in their passwords, as such passwords are easier to guess. However, it's important to note that the add-on does not save any personal information. Instead, it utilizes a bloom-filter to persist the personal information without actually storing the data. Furthermore, all data is saved locally, ensuring privacy and security.

PrivateMeter is a valuable tool for anyone looking to enhance the security of their passwords. With its password strength calculation and feedback capabilities, users can make informed decisions about the strength of their passwords and take necessary steps to improve their online security.