Website answers / Getting Started

How do I add custom code to my Squarespace site?

Reviewed October 13, 2026, by Long Drive Group.

Identify the function you need and check your site’s current version, plan, and supported code controls. Keep a copy of the original content before editing.

Test code in an owned site and confirm mobile behavior, accessibility, and the ordinary editing workflow. Document removal and recovery. Developer Mode is a separate 7.0 method; it is unavailable on 7.1.

Platform reference

Official Squarespace getting-started guidance. Check your site’s version before using version-specific setup instructions.

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Read setup and delivery guidance or ask for help with your site.