Small businesses send hundreds of emails a month, and almost all of them end with a sign-off. That sign-off is free advertising space: a chance to look professional, share your website, and make it easy for the recipient to contact or book you. Yet most small-business emails end with just a name, or nothing at all, wasting an opportunity that costs nothing to use.

Free email signature generators solve this in minutes. They provide templates, let you add your photo, job title, links, and social profiles, and produce code you paste into your email client. This guide explains what makes a good signature and how to build one for free.