Used by the world’s top digital agencies.

See what Portland-based digital creative studio Instrument has to say about working with the Squarespace Developer Platform.

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Create the Site You Want

Our Developer Platform gives you full control over your Squarespace site HTML, CSS, and JavaScript while providing you with a JSON API to output content created using the CMS.


This system has been built by some of the best engineers in the world, and it's the same platform we use to create consumer level templates. Whatever you make, you'll love making it here.

Full Code Control

Change anything from the doctype to the footer. With Developer Mode enabled, you have access to all the template files that make up your Squarespace website.

Local Development

Use the Squarespace Development Server to develop your site locally while working with your preferred native build tools.

Git Built-in

All Squarespace template repositories are exposed via Git automatically, so you can work with a team and easily roll back.

JSON Data Store

Query any page as JSON to access any of the website data in a structured way...your site content is an API.


Our familiar template language has very few language constructs to learn, yet offers the power and expressiveness needed to implement any design.


Whether you have 10 or 10,000 visitors a day, your site will remain online. We host our site on the same servers, so we're in this together.

Content Delivery Network

Our built-in CDN reduces load times using hundreds of geographically distributed servers to load your static images, scripts, and stylesheets fast.

Site Manager

Manage content created with the CMS using the same robust backend that powers hundreds of thousands of sites on our consumer platform.

You’re in Great Company

Some of the top brands, artists, and creative agencies in the world trust the Squarespace Developer Platform to run their websites.