Navigate to icloud.com, then sign in with your Apple ID and enter the two-factor verification code if prompted. Your iCloud page then appears, displaying all the applications and tools supported by the service. These include Mail, Contacts, Calendar, Photos, iCloud Drive, Notes, Reminders, Pages, Numbers, Keynote, Find Friends, and Find iPhone. A link to your Account Settings also appears.

To access these apps and view their respective data on the web, you'll need to make sure you're syncing the data with iCloud. On your iPhone, navigate to Settings > [your name] > iCloud. Under apps using iCloud, turn on the switch for those you'd like to sync.

Click the Mail icon to view your iCloud mail account, where you can organize items and send or delete messages.

Click the Contacts icon to view all the contacts in the address book that you're syncing with iCloud. You can also create new contacts as well as modify or delete existing contact information. 

Click the Calendar icon to view your calendar appointments as well as create new ones and delete or modify existing ones.

Click the Photos icon to view any photos being synced with iCloud. You can also upload new photos, delete or download existing photos, and share any photos via email or Facebook.

Click the icon for iCloud Drive to view and open any files you have stored in iCloud Drive, Apple's file-syncing and storage service. You can also email, download, and delete any file as well as upload new files and create new folders to house your files.  

Click the Notes icon to view any notes backed up to iCloud as well as create new notes and revise or delete existing ones.

Click the Reminders icon to view your reminders, create new reminders, and modify or delete existing reminders.

Click Pages, Numbers, or Keynote to create new documents or view and manage any files stored in iCloud.

As the web version of Apple’s Find My app, you can click Find Friends to view a map that shows the location of any person who has chosen to share their location with you via iPhone or iPad.

Similarly, click Find iPhone if you have lost one of your own devices. You can view a map that shows the location of your iPhone, iPad, Apple Watch, or Mac. To use this feature, you need to have activated Find My iPhone on your iPhone or iPad. To check this on your mobile device, go to Settings > [Your Name] > Find My. If you don’t want this feature to track your location, turn it off from the appropriate device.

Click Account Settings to view your existing iCloud storage and any Apple devices to which you’re currently signed in.

At the Settings page, you can also try to restore any files, contacts, calendars, reminders, and bookmarks that have been deleted from iCloud. To do this, click one of the links at the bottom of the page in the Advanced section, such as Restore Files, Restore Contacts, Restore Calendars, or Restore Bookmarks. From the Restore window, click the item you want to restore and then click Done.

If you’re on a Windows 10 PC, you can access iCloud through the iCloud for Windows app, which offers similar functionality to Microsoft OneDrive. Downloading the app from the Microsoft Store allows you to access your iCloud Drive files directly from File Explorer without taking up space on your PC. You can choose which files and folders you want to keep on your PC and access them from your iPhone, iPad, Mac, or from iCloud.com. iCloud files can also be directly shared from the File Explorer window.

The iCloud Desktop Control Panel is an option Windows 7, 8.1, and 10 users. This program allows you to access each individual feature (Contacts, Calendar, Mail Notes, etc.) from the Start menu. Clicking on a shortcut for any feature then brings you to iCloud.com.

You can also sign out of any browsers that you are currently signed into by clicking the Sign Out Of All Browsers link. Certain apps also allow people to find you based on your Apple ID. If you want to see which apps allow this, or want to turn this capability off, click the link that says Manage Apps That Can Look You Up.