Step 1 – Copy the Snippet code below.
<div id="spiceshippingappid"></div>
Step 2 – Go to Online Store under the Shopify admin.
Step 3 – Select Actions (Current theme) and click “Edit code”.

Step 4 – Find the file cart.liquid in the templates folder.

Step 5 – In the cart.liquid file search for the included file name {% section ‘cart-template’%} in the ‘Sections’ folder.
In our theme, the file name is “cart-template“. It may vary depending upon the theme.
Step 6 – Find the <form> and </form> tags in the cart-template.liquid file and paste the snippet above </form> tag.

*For free