Checkout page

Store Design

Topic summary

Goal: Add custom CSS/JS to the Shopify checkout page.

  • Key constraint: Direct checkout customization is restricted on standard plans for security and consistency. Full checkout code access is available only on Shopify Plus.

  • If on Shopify Plus: Use Checkout.liquid to add CSS/JS (in or at the bottom of ). Edit via Online Store > Themes > Edit code > Layout > Checkout.liquid.

  • If not on Plus: Injecting custom CSS/JS into checkout isn’t allowed. You can adjust branding (colors, logo, basic styling) under Settings > Checkout.

  • Alternatives: Consider post-purchase or upsell apps/pages for custom styling and scripts after checkout completion. Apps cannot directly inject code into the checkout itself.

  • Next steps: For advanced needs, upgrade to Shopify Plus or consult Shopify Support about any plan-eligible options.

  • Status: Informational guidance provided; no direct workaround for non-Plus stores. No unresolved disagreements noted.

Summarized with AI on December 14. AI used: gpt-5.
1

How can Load CSS & JS Shopify Checkout page?

2

Hello @SonomaInfotech ,

To load custom CSS and JavaScript on the Shopify checkout page, you need to be aware that Shopify restricts direct access to the checkout page for most stores unless you’re on Shopify Plus. If you’re on Shopify Plus, you can use the Checkout Liquid templates to add custom CSS and JavaScript.

Thanks!

3

Hi @SonomaInfotech ,

Thank you for your question.
In Shopify, adding custom CSS or JavaScript directly to the checkout page is restricted on standard Shopify plans for security and consistency reasons. However, after conducting quick research, I would like to tell you that there are some approaches depending on your needs and plan:

  1. Upgrade to Shopify Plus:

    • If you’re on Shopify Plus, you have access to the Checkout.liquid file, which allows you to add custom CSS and JavaScript directly to the checkout page.
    • You can add your CSS and JS within the or at the bottom of the in the Checkout.liquid file.
    • Navigate to Online Store > Themes > Edit code and look for the Checkout.liquid file under Layout.

  2. Customizing Checkout for Non-Plus Stores:

    • On non-Plus plans, Shopify restricts customization on the checkout page, so adding custom CSS or JS is not possible.
    • However, you can still use Shopify’s branding and style options under Settings > Checkout to adjust colors, logos, and some layout features.
    • You could also explore app options for customizing the checkout experience (though they won’t allow direct CSS/JS injection).

  3. Alternative Approaches:

    • Some merchants use custom post-checkout pages or upsell apps that trigger after the checkout is complete. This can give you some level of control over styling and scripting for a post-purchase experience.

If you have specific styling or functionality needs and are on a standard Shopify plan, you might consider reaching out to Shopify Support to see if any workarounds are possible.

I hope my answer is helpful!

Best,
Liz.