From Substack to Squarespace: A Developer's Guide to a Seamless Migration
There is no button that says “Move my Substack to Squarespace.”
If you’ve ever tried, you already know that. You get a CSV. You get a pile of HTML files. And Squarespace politely tells you it only wants WordPress XML. That mismatch is where most migrations die.
I just finished moving 734 posts from Substack into Squarespace. This is how I did it, working alongside Manus AI, without losing dates, titles, or content, and without re-publishing everything by hand.
Fixing the Missing Substack Logo in Squarespace
I added my Substack link in Squarespace the same way you add every other social icon: drop it into the social links area, save, move on. Except Squarespace doesn’t ship a native Substack icon in a lot of templates, and when it doesn’t recognize the domain as a “known” social network, it falls back to the generic URL icon.