CloudFormation Template Generator

Build AWS CloudFormation YAML with S3, EC2, Lambda, IAM and DynamoDB presets

AWSTemplateFormatVersion: "2010-09-09"
Description: Sample stack generated by DevTools
Resources:
  MyAppExecutionRole:
    Type: AWS::IAM::Role
    Properties:
      AssumeRolePolicyDocument:
        Version: "2012-10-17"
        Statement:
          - Effect: Allow
            Principal:
              Service:
                - lambda.amazonaws.com
                - ec2.amazonaws.com
            Action: sts:AssumeRole
      ManagedPolicyArns:
        - arn:aws:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole
  MyAppBucket:
    Type: AWS::S3::Bucket
    Properties:
      BucketEncryption:
        ServerSideEncryptionConfiguration:
          - ServerSideEncryptionByDefault:
              SSEAlgorithm: AES256
      PublicAccessBlockConfiguration:
        BlockPublicAcls: true
        BlockPublicPolicy: true
        IgnorePublicAcls: true
        RestrictPublicBuckets: true
  MyAppFunction:
    Type: AWS::Lambda::Function
    Properties:
      Runtime: nodejs20.x
      Handler: index.handler
      Role:
        Fn::GetAtt:
          - MyAppExecutionRole
          - Arn
      Code:
        ZipFile: "exports.handler = async () => ({ statusCode: 200, body: 'ok' });"
Parameters:
  Environment:
    Type: String
    Default: dev
    Description: Deployment environment
Outputs:
  BucketName:
    Value:
      Ref: MyAppBucket
    Description: S3 bucket name
  LambdaArn:
    Value:
      Fn::GetAtt:
        - MyAppFunction
        - Arn
    Description: Lambda function ARN

About this tool

CloudFormation templates describe AWS infrastructure as YAML or JSON. Starting from scratch means remembering resource types, property names and intrinsic functions like Ref and GetAtt.

This generator builds a starter template with common presets — encrypted S3 buckets, Lambda functions, IAM roles, EC2 instances and DynamoDB tables — plus Parameters and Outputs sections. Edit the YAML before deploying to your account.