Description:
Validate CloudFormation templates against the CloudFormation spec
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Type: Formula
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Latest Version: 1.43.0@0
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Tracked Since: Dec 17, 2025
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Links:
Homepage |
formulae.brew.sh
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Category: Devops
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Tags:
cloudformation
aws
linting
devops
infrastructure-as-code
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Install:
brew install cfn-lint
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About:
cfn-lint is a command-line tool that validates AWS CloudFormation templates against the official AWS resource specifications. It checks for syntax errors, best practices, and potential security issues before deployment. This helps developers catch configuration mistakes early, ensuring templates are reliable and compliant.
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Key Features:
- Validates templates against AWS CloudFormation spec
- Enforces best practices and security rules
- Provides actionable error and warning messages
- Supports both JSON and YAML template formats
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Use Cases:
- Pre-deployment validation in CI/CD pipelines
- Code reviews for CloudFormation template changes
- Migrating templates to newer CloudFormation resource specifications
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Alternatives:
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cfn-guard
– cfn-guard focuses on policy-as-code compliance, while cfn-lint performs broader spec and best practice validation.
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tfsec
– tfsec is for Terraform, whereas cfn-lint is specifically designed for CloudFormation templates.
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