How to open Dropbox PDF files in a Squarespace lightbox popup
You can use Lightbox Studio to display PDF files in a lightbox on Squarespace, by default it support PDF files uploaded to your Squarespace website, but can it supports PDF files hosted on Dropbox?
Dropbox URLs, such as https://www.dropbox.com, don’t support CORS, preventing PDFs hosted on Dropbox from displaying on Squarespace. However, Dropbox provides a https://dl.dropboxusercontent.com domain that supports CORS by default. This tutorial will guide you through the steps to display Dropbox-hosted PDFs in a Squarespace lightbox.
This tutorial will guide you how to open a PDF file in a lightbox popup in your Squarespace website. Below are the steps in this tutorial:
- Step 1 - Install Lightbox Studio 
- Step 2 - Upload the PDF to Dropbox. 
- Step 3 - Copy the Dropbox share link and change the domain from - https://www.dropbox.comto- https://dl.dropboxusercontent.com.
 Pro tip: Use this free dev tool to quickly convert your PDF link to a downloadable link.
- Step 4 - Create a text or button link to the PDF, ensuring “Open link in new tab” is unchecked. 
- Step 5 - Your Dropbox PDF will now open in a lightbox. 
A demo created with above tutorial is as below:
Step-by-step video tutorial can be found below:
