Best Free Squarespace Plugins

Squarespace supports third-party plugins and code snippets that can add features or style tweaks to your site without extra cost. Below is a curated list of completely free plugins (not just limited free tiers) organized by category. Each plugin is well-reviewed and from a trusted source. We include what each does, how it improves your site, and where to get it.

SEO (Search Engine Optimization) Plugins

Squarespace SEO Plugin (by SEOSpace)

A popular Chrome extension that acts like “Yoast for Squarespace,” automating many technical SEO tasks. It helps optimize page titles, meta descriptions, image alt text, internal links, and more​. The plugin provides an audit checklist and step-by-step recommendations to improve your site’s structure and content for better Google rankings​. It’s widely used by Squarespace site owners and is free to install (with all core features available at no cost). Where to get it: Available from SEOSpace (as a Chrome browser extension)​.

Design Customization

Announcement Bar Button (GhostPlugins)

Adds a custom clickable button to your site’s top announcement bar (which by default only allows text). This free plugin lets you turn that bar into a call-to-action by styling a link as a button​. It’s easy to implement: create a link in your announcement bar, then paste the provided CSS for instant button styling. Works on all Squarespace 7.0 and 7.1 templates​. Source: GhostPlugins (they provide the code snippet and instructions).

Back to Top Button (Will Myers)

Improves navigation on long pages by adding a floating “back to top” arrow or text button. This plugin is simple but boosts user experience, letting visitors scroll back up with one click​. You can customize the button’s appearance to match your site. Source: Will Myers offers this plugin for free on his website​ and it installs via a small code injection.

Solid Underline Headings (GhostPlugins)

A pure CSS plugin that adds a stylish solid underline to your titles or headers. It gives your headings a distinctive look and can be customized (color, thickness, etc.) to match your branding​. This enhances the design beyond Squarespace’s built-in style options and works on any template. Source: GhostPlugins (free code snippet with instructions).

E-commerce Enhancements

Yotpo Product Reviews Widget

Easily integrate product reviews into your Squarespace store. Yotpo is a leading reviews platform and offers a completely free version for basic use. With it, you can collect customer reviews and display them on your product pages, boosting trust and social proof​. The integration is seamless – once added, each product page can show ratings and reviews. Where to get it: Sign up on Yotpo’s website (the core reviews widget is free to use) and follow their Squarespace installation guide.

Upsell Page Plugin (GhostPlugins)

A free plugin that adds an upsell or cross-sell step to your checkout flow. It allows you to redirect customers to a special page with related products or offers before they reach the cart, increasing potential order value​. (Make sure to disable “Express Checkout” so that the upsell page appears.) This plugin is a copy-paste code solution – GhostPlugins provides the code and setup steps on their site.

Featured Product Tag (GhostPlugins)

Highlights specific products in your store with a custom “featured” badge or label. This plugin repurposes the built-in Featured flag on products to display a stylized tag (like a ribbon or icon) on product listings​. It’s great for drawing attention to new or popular items. The code is free and works on Squarespace 7.1, with instructions available through GhostPlugins.

(Bonus: GhostPlugins offers other free e-commerce tweaks, like custom “Sold Out”/“Sale” labels and a custom order confirmation page. They’re all available in the Ghost free plugin library.)

Analytics and Tracking

Visitor Counter (Elfsight)

A handy plugin to display live visitor statistics on your site. It adds a counter element (e.g. “___ visitors have been here”) which can help build credibility by showing your traffic publicly​. The counter updates as users visit, essentially giving a simple analytics glimpse to both you and your audience. This is fully free to use and requires pasting a small widget code. Where to get it: Elfsight’s website provides the Visitor Counter widget for free – you configure the style and then embed it via a code block or Code Injection.

(Note: Squarespace has built-in Analytics for traffic, sales, and more in your site dashboard. For advanced analytics, you can also add Google Analytics by entering your Tracking ID in Settings, no plugin required. The above Visitor Counter is more about displaying stats on the website itself.)

Social Media Integration

Facebook Messenger Chat

This plugin lets you embed a Facebook Messenger live chat button on your Squarespace site so visitors can message you directly via Facebook. It’s essentially Facebook’s official chat widget integrated into your site’s pages. The version from Elfsight is very easy to install (no coding needed) and comes with customizable chat bubble designs​. It allows real-time engagement: messages go straight to your Facebook inbox, helping with customer support or inquiries. The core Messenger chat is free and doesn’t require any paid plan. Where to get it: You can use Facebook’s free Customer Chat code or use Elfsight’s free widget generator​ and embed the code in Squarespace.

Social Share Buttons (ShareThis)

Add a set of social media “share” icons to your blog posts or pages, so visitors can share your content on Facebook, Twitter, Pinterest, etc. with one click. ShareThis provides a completely free sharing tool (no upgrades needed)​. You can choose the button style (icons, counts, floating bar, etc.) and the networks to include. This plugin enhances your marketing by encouraging readers to spread your content on social platforms. Where to get it: Go to ShareThis.com, create a free account to customize your share buttons, then embed the provided code in your Squarespace site (requires a Business plan for Code Injection). ShareThis is free and trusted, making it a popular choice for social sharing features​

Each of these plugins extends Squarespace’s functionality without costing you anything. Be sure to follow the installation instructions from the plugin providers (most involve adding a Code Injection or code block snippet). With these free enhancements in SEO, design, e-commerce, analytics, and social integration, you can significantly improve your Squarespace site’s capabilities at no extra charge.