How to fix landmark one main on Squarespace

Steps for Squarespace

1. Squarespace does not allow direct HTML structural edits to its layout. Go to Website → Pages, and for each page open the page settings.
2. In the Design tab of your page, look for a 'Page Section' with an Advanced or Custom CSS/Code block option.
3. Use Settings → Advanced → Code Injection (available on Business plan and above) to inject a small JavaScript snippet into the page footer that programmatically adds `role="main"` to the primary content wrapper (commonly `#page` or `#content`).
4. Test the injected role using the axe DevTools extension on the live published page.
5. Note: Squarespace 7.1 templates are not fully editable at the HTML level; if you need full landmark control, consider migrating critical content to a supported custom-code block or contacting Squarespace support about their built-in accessibility roadmap.

What is landmark one main?

Every web page should have exactly one "main" landmark — a special HTML tag (`<main>`) or ARIA role (`role="main"`) that marks the start of the primary content on the page. Think of it like a "skip to content" anchor that is built directly into the page structure. Screen readers and other assistive technologies use landmarks to let users jump between sections (navigation, header, main content, footer) without having to listen to everything in order. The `landmark-one-main` rule specifically checks that your page has one — and only one — such marker.

Without a main landmark, people who use screen readers (blind users, users with motor disabilities who rely on keyboard or switch navigation) must tab through every link, menu item, and banner on your page before they reach any product or content — on every single page load. This is a major usability barrier that can expose your store to accessibility lawsuits under the ADA (US), AODA (Canada), EAA (EU), and similar regulations that require conformance with WCAG 2.1. Fixing it is also a WCAG 2.1 Success Criterion 1.3.6 and 2.4.1 compliance item. Additionally, Google's crawlers and structured-data systems recognise landmark regions, so clear page structure can indirectly support crawl efficiency and rich-result eligibility.

See the complete Landmark one main guide for every platform and the full background.