Inbox Preview by TrustedSite is a Chrome extension that provides users with a sneak peek into what they can expect when signing up for the mailing list on various websites. With this extension, users can make informed decisions about whether or not to provide their email address.

One of the key features of Inbox Preview is the spam risk rating it provides for thousands of sites. Users can easily see if they are likely to receive spam before signing up, helping them avoid potential headaches in the future. Additionally, the extension allows users to find out how many emails they are actually signing up for, providing transparency and helping them manage their inbox effectively.

Inbox Preview by TrustedSite is a lightweight extension that does not require much system resources. It works by monitoring the results of sign-ups on thousands of websites using unique email addresses, so users don't have to guess the potential outcomes. If the extension doesn't have results for a particular site, users can vote to rate it in the future, contributing to the overall accuracy and usefulness of the extension.