$49.00
Fit check
Great for
Blogs wanting a recent posts or author bio column
Shops promoting best sellers or flash sales beside content
Sites collecting email sign-ups on every page
Designers rebuilding 7.0 sidebar layouts on 7.1
Version7.1
SetupEasy
Overview
Squarespace 7.1 famously dropped sidebars, and this plugin brings them back with a clever twist: you design one ordinary page as a Master Source, then display its content as a live sidebar on any other pages you choose. Edit the source once and every connected sidebar updates instantly, with no copying and pasting. It supports up to two sidebars per page (distinct left and right), inherits your site's existing fonts and colours, installs via a short snippet in Code Injection, and is customised through a built-in style and code generator. $49 as a one-off for a single site, with a $249 agency licence covering unlimited client sites.
See what else made our roundup of the best Squarespace plugins in 2026.
What it does
- Turns any Squarespace page into a Master Source for a sidebar
- Displays that page's content as a live sidebar on the pages you choose
- Syncs every connected sidebar the moment you edit the source page
- Supports up to two sidebars per page, left and right
- Installs with a short snippet in Code Injection
Full specifications
Specifications
Squarespace Version
7.1
What it does
Turns any squarespace page into a master source for a sidebar
Displays that page's content as a live sidebar on the pages you choose
Syncs every connected sidebar the moment you edit the source page
Supports up to two sidebars per page, left and right
Installs with a short snippet in code injection
Displays that page's content as a live sidebar on the pages you choose
Syncs every connected sidebar the moment you edit the source page
Supports up to two sidebars per page, left and right
Installs with a short snippet in code injection
Key Features
Master source page keeps every sidebar in sync
Two distinct sidebars per page
Inherits your site's existing fonts and colours
Styling through the built-in style and code generator
Direct support from the developer, one-time payment
Two distinct sidebars per page
Inherits your site's existing fonts and colours
Styling through the built-in style and code generator
Direct support from the developer, one-time payment
Best for
Blogs wanting a recent posts or author bio column
Shops promoting best sellers or flash sales beside content
Sites collecting email sign-ups on every page
Designers rebuilding 7.0 sidebar layouts on 7.1
Shops promoting best sellers or flash sales beside content
Sites collecting email sign-ups on every page
Designers rebuilding 7.0 sidebar layouts on 7.1
Setup Difficulty
Easy
FAQs
FAQs
How does the Master Source system work?
You build one standard Squarespace page with the content you want to reuse, then choose which pages display it as a sidebar. The plugin pulls that page's content in live, so editing the source updates every sidebar instantly.
What kind of content can go in the sidebar?
Anything you can put on a Squarespace page: contact forms, banners, product lists, email sign-up blocks, author bios, buttons, images and text.
Can I have more than one sidebar on a page?
Yes, up to two per page, one left and one right. A common setup is global links on one side and a page-specific campaign on the other.
Will the sidebar match my site's design?
Yes. Because it renders a real Squarespace page, it inherits your existing fonts and colours automatically, and a built-in style and code generator covers further customisation.
How is it installed?
You paste a short snippet into Squarespace's Code Injection area, then select your Master Source page and the target pages. A step-by-step guide walks you through it, and no coding knowledge is needed.
How does licensing work?
Both licences are one-time payments with no subscription. The $49 solo licence covers one production website, and the $249 agency licence covers unlimited websites including client sites, with support direct from developer Dmytro Kyselov.