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AWS IAM Policy Builder

Create secure AWS Identity and Access Management (IAM) policies with our visual builder. Construct statements easily and instantly generate the corresponding JSON format. This tool operates entirely in your browser, ensuring that your sensitive cloud architecture details and ARNs are never transmitted over the network.

AWS IAM Policy Builder
Build AWS IAM JSON policies visually with a dynamic form and instant JSON generation.
Local Only
Policy Statements

How ZeroData protects your privacy

  • ✓ No Uploads: Processing happens entirely via client-side JavaScript.
  • ✓ No Storage: We do not have a database. We physically cannot save your data.
  • ✓ No Tracking: We don't log what you process or track your inputs.
  • ✓ Verifiable: Check your DevTools Network tab. You will see 0 outbound requests.

Understanding AWS IAM Policy Structure

Every IAM policy consists of one or more Statements. Each statement defines a specific rule for access control and contains the following core elements:

  • Effect: Specifies whether the statement results in an Allow or an explicit Deny. An explicit deny always overrides an allow.
  • Action: Describes the specific API operations the policy grants or denies. This is typically formatted as service:operation (e.g., s3:PutObject).
  • Resource: Identifies the exact AWS resources (using their ARNs) the actions apply to. By being specific here, you prevent broad, unintended access.

The Principle of Least Privilege

When designing IAM policies, security best practices dictate following the Principle of Least Privilege. This means granting a user or service only the minimum permissions necessary to perform its intended function. Using the visual builder helps you explicitly list necessary actions and target resources instead of defaulting to dangerous wildcards (*).

Common IAM Policy Pitfalls

Watch out for these frequent mistakes when hand-coding IAM JSON:

  • Overly permissive actions: Using s3:* when the application only needs to read objects.
  • Missing resource scopes: Allowing actions on * instead of limiting them to a specific arn:aws:s3:::my-bucket/*.
  • Syntax errors: Missing commas or brackets in JSON arrays. Our tool handles the JSON formatting for you, eliminating syntax issues entirely.

Browser Compatibility and Privacy

Security tools handling your infrastructure configuration must be secure. This AWS IAM Policy Builder runs 100% locally using client-side JavaScript. Your configurations, service definitions, and resource ARNs never leave your machine. The JSON is built dynamically in your browser memory and disappears the moment you close the tab.

Enhance Your Cloud Security

If you are working with infrastructure secrets, check out our Kubernetes Secret Generator or format your environment variables using our ENV to JSON Converter. Ensure all your configuration JSON files are error-free with our local JSON Validator.

How to Use the AWS IAM Policy Builder

  1. Click 'Add Statement' to begin defining a new permission block.
  2. Choose whether the statement should 'Allow' or 'Deny' access.
  3. Enter the AWS Service prefix (e.g., s3, ec2, dynamodb) to automatically scope the actions.
  4. Type the specific Actions you want to permit, separated by commas (e.g., GetObject, ListBucket).
  5. Provide the specific Resource ARNs this policy applies to, separated by commas.
  6. Copy the generated JSON output and use it in your AWS console, AWS CLI, or Infrastructure-as-Code scripts.

Common Use Cases

  • Generating least-privilege policies for CI/CD pipelines (e.g. GitHub Actions to AWS).
  • Creating read-only S3 bucket access policies for audit tools.
  • Configuring restrictive Lambda execution roles with access only to specific DynamoDB tables.
  • Building IAM policies for cross-account access securely.
  • Prototyping and visualizing policy JSONs before applying them in Terraform or CloudFormation.

Frequently Asked Questions

What is an AWS IAM Policy?

An AWS IAM (Identity and Access Management) policy is a JSON document that defines permissions for an identity (user, group, or role) or resource. It specifies what actions are allowed or denied on which AWS resources.

What is the Principle of Least Privilege?

The principle of least privilege dictates that you should grant only the permissions required to perform a task. Avoid using wildcard (*) permissions unless absolutely necessary, and specify exact ARNs and actions instead.

Is my policy data private?

Yes. This tool operates 100% locally in your browser. The IAM policies you build, including any sensitive ARNs or resource names, are never transmitted to our servers or any third party.

How do I use multiple services in one statement?

While you can combine services by leaving the 'AWS Service (Prefix)' blank and typing full action names (e.g., s3:GetObject, ec2:DescribeInstances) in the Actions field, it is generally recommended to create separate statements for different services for better readability and security.

What is an ARN?

ARN stands for Amazon Resource Name. It uniquely identifies an AWS resource. For example, an S3 bucket ARN looks like arn:aws:s3:::my-bucket. Many IAM policies require you to specify exactly which ARNs the policy applies to.

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