SharePoint helpful hidden URLs

Sign in as another user

/_layouts/closeConnection.aspx?loginasanotheruser=true

As soon as you hit this page, the familiar pop-up will prompt you for the username to log in with. Once you log in, you will be redirected to the home page.

https://siteurl/sites/site/SitePages/Home.aspx?contents=1

Web Part Page Maintenance

Append ?contents=1 to your web part page URL

When you add a Web Part (WP) to your page and then edit the view without saving first you may notice the WP has disappeared when you navigate back to your page.
You can delete the WP by navigating to the Web Part Maintenance page and manage all existing WP’s there.

Use this page to close Web Parts on your page, restore defaults to Web Parts, or delete Web Parts from your page.

The User Information List

The user information list can be accessed by navigating to /_catalogs/users/simple.aspx from your site collection.

The above works on SharePoint 2007, SharePoint 2010, SharePoint 2013 and SharePoint 2016

https://siteurl/_catalogs/users/detail.aspx – If you want to see the detail view of only Users in the list.
https://siteurl/_catalogs/users/simple.aspx – The blow URL will show the simple view of only Users in the List
https://siteurl/_catalogs/users/allgroups.aspx – This will provide all the groups without users available in
https://siteurl/_layouts/15/people.aspx?MembershipGroupId=0

When a user is granted access to a site, a new item will be created in the User Information List.
More information here

Filter Toolbar

For Lists and Libraries

?Filter=1

View Page in a Dialog

?isdlg=1

Show List in Grid View

?ShowInGrid=True

SharePoint version Number

After your base URL:

/_vti_pvt/service.cnf