Format Terraform and HCL configuration with consistent indentation, spacing, and attribute alignment.
Format Terraform and HCL configuration for consistent readability.
Formatted Terraform configuration.
variable "instance_type" {
description = "EC2 instance type"
type = string
default = "t3.micro"
validation {
condition = contains([
"t3.micro",
"t3.small", "t3.medium"], var.instance_type)
error_message = "Unsupported instance type."
}
}
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Terraform HCL Formatter is a browser-based tool for formatting Terraform configuration and HashiCorp Configuration Language (HCL) files. It helps improve readability by applying consistent indentation, spacing, block formatting, and attribute alignment without requiring Terraform to be installed.
Terraform uses HashiCorp Configuration Language (HCL) to define infrastructure resources, providers, variables, outputs, modules, locals, and other configuration elements.
HCL is designed to be human-readable, but consistent formatting becomes increasingly important as Terraform configurations grow across multiple files, modules, and environments.
This tool formats Terraform and HCL configuration into a more consistent and readable structure. It is designed for quick browser-based formatting without requiring a local Terraform installation.
The formatter can normalize common formatting patterns such as indentation, spacing around assignments, and the layout of Terraform blocks and attributes.
Formatting and validation are different operations. A Terraform configuration can be formatted correctly while still containing invalid resources, arguments, references, provider configurations, or other Terraform errors.
This formatter focuses on improving the presentation and readability of HCL configuration. It does not replace Terraform validation or planning.
Terraform includes the terraform fmt command for formatting Terraform configuration files according to Terraform's formatting conventions.
This browser-based tool is useful when you want to quickly format or inspect Terraform and HCL configuration without installing Terraform locally. For production workflows, teams should continue to use the official Terraform tooling and formatting checks as part of their development or CI/CD process.
Consistent formatting makes infrastructure code easier to read, review, maintain, and troubleshoot. It also reduces unnecessary formatting differences in pull requests and helps teams keep shared Terraform repositories consistent.
Readable configuration is particularly useful when working with large modules, nested blocks, multiple environments, and infrastructure managed by several engineers.
Terraform configuration is commonly organized into blocks such as resource, data, variable, output, provider, module, and terraform blocks. Blocks can contain attributes and nested blocks.
Proper indentation and spacing make these relationships easier to understand, especially when configurations contain deeply nested structures or complex expressions.
Formatting should improve the presentation of configuration without intentionally changing its meaning. A formatter should not be treated as a tool for modifying resource arguments, expressions, providers, dependencies, or infrastructure behavior.
After making significant changes to Terraform configuration, use Terraform's own validation and planning commands to confirm that the configuration behaves as expected.
HCL supports a wide range of expressions, nested structures, heredocs, templates, comments, and Terraform-specific syntax. Browser-based formatting logic may not provide the same complete parsing and formatting behavior as the official Terraform formatter.
For complex or production Terraform configurations, verify the result with Terraform tooling before committing or applying infrastructure changes.
Terraform configuration can contain infrastructure details such as resource names, account identifiers, endpoints, environment information, module configuration, and references to sensitive values.
Avoid placing actual secrets, passwords, private keys, access tokens, or other credentials into configuration unless they are already protected appropriately. ToolTunnel is designed to process the formatting operation locally in your browser without requiring the Terraform configuration to be uploaded to a ToolTunnel backend.
Terraform HCL is the HashiCorp Configuration Language used by Terraform to define infrastructure resources, providers, variables, modules, outputs, and other configuration.
It formats Terraform and HCL configuration to improve indentation, spacing, block structure, and overall readability.
No. Terraform provides the official terraform fmt command for formatting Terraform configuration. This browser-based tool provides a convenient way to format and inspect HCL without requiring Terraform to be installed.
Formatting is intended to change the presentation of the configuration rather than its infrastructure behavior. You should still validate and plan your Terraform configuration using Terraform before applying changes.
No. Formatting and validation are different operations. A configuration can be formatted correctly while still containing invalid Terraform resources, arguments, references, providers, or expressions.
Yes. This ToolTunnel formatter runs in your browser and is designed for quickly formatting Terraform and HCL configuration without requiring a local Terraform installation.
Yes, although very large or complex Terraform configurations may contain syntax and structures that require verification with the official Terraform tooling.
For production Terraform workflows, using the official terraform fmt and validation tooling in development or CI/CD provides stronger compatibility with Terraform's supported syntax and formatting conventions.
No. The formatter is designed to process Terraform and HCL configuration locally in your browser without uploading the configuration to a ToolTunnel backend.
No. Use Terraform validation, planning, and other infrastructure checks to verify that your configuration is syntactically and semantically correct before deployment.