You can use iCloud from anywhere by signing in to iCloud.com from a web browser recommended in the Apple Support article System requirements for iCloud.
Sign in to iCloud.com
Go to iCloud.com, then sign in with the same Apple ID you used to set up iCloud.
If you set up two-step verification, follow the onscreen instructions to verify your identity by entering a code sent to a trusted device.
See the Apple Support article Two-step verification for Apple ID.
For troubleshooting tips, see Trouble signing in to iCloud.com.
Apps and features on iCloud.com
You can use iCloud.com to view information stored in iCloud from a web browser. Learn what you can do with the following apps and features on iCloud.com on a computer:
If you do not see an app that you are looking for, you may need to access iCloud.com on a different device. See the Apple Support article Which iCloud.com features are available in the browser on your device.
Switch to a different iCloud.com feature
At the top of the iCloud.com window, click the name of the feature you are currently using, then click another feature.
Sign out of iCloud.com
Do one of the following:
Sign out from the browser you are using now: click your name at the top of the iCloud.com window and choose Sign Out.
Sign out from every browser where you are currently signed in: go to Settings on iCloud.com, click Sign Out of All Browsers (in the Advanced section), then click Sign Out.