How to Add Pop up on Squarespace, Promotional or Email Popup Guide 2026

From your Squarespace dashboard, open the site you want to edit and look at the left-hand Pages panel. Scroll down past your regular navigation pages (Home, About, News, and so on) to the Not Linked section, and further down still to Marketing Tools, System Pages, and Custom Code. Promotional Pop-Up lives inside Marketing Tools rather than as its own page, which is the part people usually miss on the first try.

Click into Promotional Pop-Up and you'll see a short description — "Create a pop-up that displays when a visitor opens your website" — along with a Display Pop-Up toggle, currently switched off. Flip it on to activate the feature. A live preview on the right shows a default "Join our mailing list" popup already sitting on top of your homepage, complete with an email field and Subscribe button, so you can see immediately how it will look to a real visitor.

Click Change Layout to open a grid of layout thumbnails — different arrangements of image, headline, and form placement. Clicking a thumbnail marks it Selected and updates the live preview behind the panel immediately, so you can compare a few options against your actual homepage before committing. This is worth spending a minute on, since a layout that clashes with your site's imagery is one of the fastest ways to make a popup feel like an afterthought.

Once you've picked a layout, edit the popup's actual content: the headline, the supporting line, and what happens when someone submits it. The default text — "Join our mailing list.

Be the first to know about new arrivals, sales, exclusive offers, and special events." — works as a generic starting point, but swap it for your specific offer or announcement rather than leaving the placeholder copy live. Under Action, choose whether the popup collects an email signup or links out to a button or another page instead.

Click Save to apply your changes, then check the popup on both desktop and mobile using the device toggle at the top of the editor. Popups often need separate attention for smaller screens, since a layout that looks balanced on desktop can crowd a phone screen or push the close button off view. Confirm the close (X) button is visible and working before you consider the popup finished.

A popup that fires on every single page load trains visitors to close it without reading it. Consider whether your Squarespace plan's popup timing or frequency settings let you limit how often it appears to the same visitor, and reserve it for something worth the interruption — a real discount, a genuinely useful newsletter, or a time-limited announcement rather than a permanent fixture.