Convert a sub site to site collection on SharePoint Online
Since we don’t have many options to move sites around on SharePoint Online environment like we have on On-Prem. Following is a quick and basic guideline how to move site around SPO. In this tutorial, I show you how to convert a sub site to Site Collection
Step 1. Save a site as template
- Open any SharePoint site that you want to move and append to the end of site URL the path that follows “/_layouts/15/savetmpl.aspx“. For instance https://companyA.sharepoint.com/sites/HR/_layouts/15/savetmpl.aspx.
- Download the template file and store on your local at the SharePoint site’s solutions gallery. i.e.https://companyA.sharepoint.com/sites/HR/_catalogs/solutions/Forms/AllItems.aspx

Step 2. Create a site collection from Admin portal
- Now go to Admin portal (i.e.. https://companyA-admin.sharepoint.com/_layouts/15/online/SiteCollections.aspx) and create a new site collection as below:

Step 3. Apply the template to new site collection
- Now Open the new site collection. You should see as below picture
- Just go ahead and select the Solution Gallery to upload your template site from step 1
- Once the file is uploaded, click on Activate to make it available on custom tab for applying site template to the new site
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Finally, Just confirm the existing user groups or create new groups then you good to good









