Which AWS service provides this functionality?

Explanations:

AWS Cloud9 is a cloud-based IDE that allows users to write, run, and debug Lambda functions directly from a web browser. It provides a seamless development experience with integrated tools for testing and debugging.

Amazon CodeGuru is a machine learning service for automated code reviews and application performance recommendations. It does not provide a browser-based IDE for running or debugging Lambda functions.

AWS CodeDeploy is a service for automating code deployments to various compute services, but it does not offer an integrated development environment for writing or debugging Lambda functions in a web browser.

AWS CodeCommit is a source control service that hosts Git repositories. While it facilitates version control and collaboration, it does not provide an IDE for developing or debugging Lambda functions in a browser.