I made a local development, debugging and hotreload tool for AWS Lambda

In plain words

MerLoc is a development tool for AWS Lambda functions that lets developers run and debug Lambda functions locally while keeping them connected to cloud workflows. It enables testing without deploying to AWS, supports IDE breakpoints for debugging, and automatically hot-reloads code changes. Developers can test individual functions with real AWS requests without the build, package, and deployment cycle.

written from the facts on this page · September 2026

From the sources

In the maker’s words, at launch

MerLoc is a live AWS Lambda function development and debugging tool. MerLoc allows you to run AWS Lambda functions on your local while they are still part of a flow in the AWS cloud remote. MerLoc makes it possible to - test your function locally without deploy to the AWS Lambda environment (so no wait for build, package and deploy) - debug your function by putting breakpoints from your IDE - hot-reload updated function on your local automatically to apply changes automatically (so again no wait for build, package and deploy) - run the individual function locally while it is still part of flow shown above and use real requests from the AWS Lambda environment

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