Recently I was trying to open the SharePoint 2013 website using SharePoint designer 2013 but I got the below error. you do not have permission to open this web site in sharepoint designer. The error also can come for SharePoint 2010 as well as when you will try to open Office 365 SharePoint online site using SharePoint designer 2013.
The error looks like below:

You do not have permission to open this Web site in SharePoint Designer 2013
Whether you want to open the site or website using Sharepoint designer 2013, the user needs to be a member of one of the following groups at the site collection level to be able to use SharePoint Designer and modify SharePoint content:
- Site Collection Administrators
- Designers
- Owners
After adding the users to any of the above groups, if the issue does not resolve then try clearing the designer cache. It should resolve the issue.
403 forbidden403 forbidden403 forbidden403 forbidden403 forbidden
Sometimes, you may get an error like You do not have permission to open this website in SharePoint Designer. 403 forbidden403 forbidden403 forbidden403 forbidden403 forbidden.
The solution to the above error was to install SharePoint designer SP1 in the machine.
The error comes if you have not installed SharePoint SP1 in the system. Based on the SharePoint designer installed in the machine, you can install SharePoint designer SP1 64-bit or SharePoint designer SP1 32-bit.
You do not have permission to open this Web site in SharePoint Designer
You may also get “You do not have permission to open this Web site in SharePoint Designer” error if, at the site collection level, SharePoint designer is not enabled to customize the site using the designer.
We can verify from the SharePoint site collection.
Open SharePoint Online/2016/2013 site collection, then from Site Collection Administration click on “SharePoint Designer Settings“. Then check if “Enable SharePoint Designer” is checked or not.

You can also directly access the SharePoint designer settings page like below:
https://SiteURL/_layouts/15/SharePointDesignerSettings.aspx
Example:
https://onlysharepoint2013.sharepoint.com/sites/Batch12/_layouts/15/SharePointDesignerSettings.aspx
Once SharePoint designer is enabled at the site collection, administrators, site owners, and designers can able to open the SharePoint site using the designer.
You may like following SharePoint designer 2013 tutorials:
- SharePoint designer workflow: Create Laptop Request Approval Workflow
- SharePoint Designer Workflow Declare item as record
- Start a task process SharePoint designer 2013 workflow action
- Copy Document SharePoint Designer 2013 Workflow Action
- SharePoint designer 2013 Workflow: Assign task to group using Assign a task workflow action
- SharePoint Designer 2013 Workflow: Do Calculation Action Example
- SharePoint Designer 2013 Workflow: Create List Item Action with Example
- SharePoint designer 2013 Workflow Condition: person is a valid sharepoint user with Example
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I am Bijay a Microsoft MVP (8 times –Â My MVP Profile) in SharePoint and have more than 15 years of expertise in SharePoint Online Office 365, SharePoint subscription edition, and SharePoint 2019/2016/2013. Currently working in my own venture TSInfo Technologies a SharePoint development, consulting, and training company. I also run the popular SharePoint website EnjoySharePoint.com