I have a WordPress installation to test before uploading to the server, but now I'm trying to make it Multisite.

I want to make the blog where I'm working on a subdomain but I don't want to delete all the posts I already have. I already have Multisite active.

Is there any way to do that?

  • I don't see any problem. The database will be updated, not overwritten. Anyway, make a DB dump and export your content as XML. If something bad happens, you'll be able to get everything back.
    – Max Yudin
    Aug 5, 2017 at 23:27

1 Answer 1


So just to clarify, you've already setup the multisite by following: https://codex.wordpress.org/Create_A_Network

And the multisite is working and you can create subdomains. But you want your current site to be a subdomain?

If so, I think the best way to do this will be to create the new sub site first, then use a cloning/migration plugin to copy all your data from your current site to the new sub site. WordPress has it's own export-import plugin:


The WordPress Importer will import the following content from a WordPress export file:

  • Posts, pages and other custom post types
  • Comments
  • Custom fields and post meta (this will include your post thumbnails and attachments).
  • Categories, tags and terms from custom taxonomies
  • Authors

Then you can remove all the data on your root site.

There are other cloning/migration plugins if you don't like the WordPress importer.

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