Open the AWS Management Console and navigate to the EC2 dashboard.

In the left navigation panel, choose Snapshots under the Elastic Block Store section.

Select the snapshot from which you want to launch the instance.

Go to Action -> Create image from snapshot.

Write a suitable image name.

Scroll down and click Create image.

In the left navigation panel, choose AMIs under the Images.

Select the newly created image.

Click on Launch instance from AMI.

Write a suitable instance name.

Scroll down and select the key pair.

Click Launch Instance.

In the left navigation panel, choose Instances under the Instances, here you can find the newly created instance.