Is AWS CloudShell free to use for learning?

Yes, AWS CloudShell is free to use for learning and practicing CLI commands. There is no additional charge for using AWS CloudShell itself. You only pay for other AWS resources you might create or use with CloudShell commands.

AWS CloudShell is a browser-based shell available directly in the AWS Management Console that provides a pre-authenticated environment for interacting with AWS resources. It comes with several AWS command line tools already pre-installed, including AWS CLI, AWS Elastic Beanstalk CLI, Amazon ECS CLI, and AWS SAM, making it ideal for learning and practicing.

A key benefit is that CloudShell is pre-authenticated with your console credentials, so there's no need to configure credentials locally. This makes it convenient for experimenting with AWS services and features.

While CloudShell itself is free, do be aware that standard AWS data transfer rates apply, and you'll be charged for any AWS resources you create and use through CloudShell commands (like if you launch EC2 instances or create other billable resources).

CloudShell does have usage limits, including restrictions on the number of concurrent sessions, commands per session, and session duration. The environment is also not persistent, meaning changes you make to the environment won't be saved permanently.
Sources
AWS CloudShell Pricing | Browser-Based Shell | Amazon Web Services
AWS Developer Tools category icon Developer tools - Overview of Amazon Web Services
How to migrate from AWS Cloud9 to AWS IDE Toolkits or AWS CloudShell | AWS DevOps & Developer Productivity Blog
Manage AWS services from CLI in CloudShell - AWS CloudShell