Squarespace Developer Mode: version and delivery requirements
Understand the 7.0 Developer Platform before choosing a source package.
By Long Drive Group. Reviewed October 13, 2026. Published March 1, 2026.
Check the version first
Squarespace’s Developer Platform is for version 7.0. It is unavailable in version 7.1. Confirm the website’s version in its Pages panel and check the current plan requirements in the official Developer Platform FAQ.
Understand what source editing means
A developer package contains template source, configuration, styles, and assets. Installing source is different from accepting a new native 7.1 site. Confirm that the package is complete and that someone can maintain its code. A homepage fragment or a Next.js preview is not a complete package.
Require a real installation demonstration
Ask to see the actual editor, the installed pages, and a change to representative content. Confirm a rollback approach before modifying an existing site. Our developer package collection requires a compatibility check before payment.
Before you choose a design
Open the product page to check its exact scope, version, delivery status, and setup requirements. Previews use sample content. Replace business claims, images, reviews, and contact details with approved content before launch.
Official platform references
Platform controls and subscriptions can change. Verify requirements in your own account before commissioning changes or buying a plan.