Run AWS Services Locally on Your PC for Free with LocalStack

While exploring tools for local cloud development, LocalStack was a powerful tool that simulates AWS services directly on your computer. It is used by developers to build and test AWS-based applications without accessing the real AWS cloud, saving time and money.

1. What is LocalStack?

LocalStack is a fully functional local cloud stack that emulates many AWS services like S3, Lambda, DynamoDB, SQS, SNS, and more.

It helps developers:

• Develop and test AWS applications offline at no cost

• Avoid accidental changes to production AWS environments

You can use LocalStack with tools like the AWS CLI, SDKs, and Terraform just like real AWS!

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2. Getting a License

LocalStack has both a Free (Community) version and a Pro version with extra features.

Student tip:

• With the GitHub Student Developer Pack, you can get a free LocalStack Pro license key

• Otherwise, sign up for a 14-day free trial at LocalStack website

After signing up, you'll receive a license key to activate LocalStack Pro.

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3. Setting Up LocalStack on Your PC

There are two main ways to install and run LocalStack:

Option 1: Install Directly on Your Machine

# 1. Install Python (3.8 or higher) and pip
# 2. Install LocalStack using pip:
pip install localstack

# 3. Set your token (if you have one):
localstack auth set-token <token>

# 4. Start LocalStack:
localstack start

Option 2: Run Using Docker (Recommended)

# 1. Make sure Docker is installed and running
# 2. Pull the LocalStack Docker image:
docker pull localstack/localstack

# 3. Run LocalStack in a container:
docker run -d -p 4566:4566 -p 4571:4571 localstack/localstack

LocalStack will start running on port 4566 (the main gateway for AWS service emulation).

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4. Using the LocalStack Dashboard

Once LocalStack is running, open your browser and go to:

👉 http://localhost:4566

You'll see the LocalStack Web Dashboard, which shows:

• Running status of your LocalStack instance

• List of available AWS services (S3, DynamoDB, etc.)

• Logs and configuration options

And also activate your license key from the dashboard.

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5. Accessing LocalStack Using AWS CLI

LocalStack works seamlessly with the AWS CLI.

Step 1: Configure AWS CLI (use dummy credentials):

aws configure

# AWS Access Key ID [None]: test
# AWS Secret Access Key [None]: test
# Default region name [us-east-1]: us-east-1
# Default output format [None]: JSON

Enter any values for Access Key, Secret Key, and Region (e.g., us-east-1).

Step 2: Point to LocalStack

Always add --endpoint-url=http://localhost:4566 to your AWS commands.

Example:

aws --endpoint-url=http://localhost:4566 s3 ls

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📦 Example: Create an S3 Bucket in LocalStack

Let's create an S3 bucket locally step by step.

Step 1: Make Sure LocalStack is Running

Verify LocalStack is up (using Docker or direct installation).

Step 2: Create a Bucket

aws --endpoint-url=http://localhost:4566 s3 mb s3://my-local-bucket

Step 3: Verify Bucket Creation

aws --endpoint-url=http://localhost:4566 s3 ls

# 2025-11-13 22:38:01 my-local-bucket

You should see your new bucket listed!

Step 4: Upload a File

echo "Hello LocalStack!" > test.txt
aws --endpoint-url=http://localhost:4566 s3 cp test.txt s3://my-local-bucket/

Step 5: List Files in the Bucket

aws --endpoint-url=http://localhost:4566 s3 ls s3://my-local-bucket/

# 2025-11-13 22:38:52         18 test.txt

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✅ Conclusion

LocalStack is a fantastic tool for developers who want to:

• Experiment with AWS locally

• Avoid unnecessary cloud costs

• Test automation pipelines or serverless applications safely

When learning AWS, building a local test environment, or developing CI/CD workflows, LocalStack makes local cloud development easy and efficient.