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Overview

LocalStack’s Lambda Tools offer a set of utilities to streamline the local development, testing, and debugging of AWS Lambda functions. Emulating Lambda behavior on your machine lets you skip cloud deployments and iterate faster in a fully local environment.

These tools are designed to shorten feedback loops and improve the developer experience with features like:

  • IDE debugging: Attach a debugger to your running Lambda function, set breakpoints, inspect variables, and step through code

  • Hot reload: Automatically apply code changes without needing to redeploy the function, enabling rapid iteration

  • VSCode integration: Use the LocalStack VSCode extension to deploy and invoke Lambda functions directly from your editor using SAM or CloudFormation templates.