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Terraform (.tf) Formatter

Developerdevops

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INPUT

Auto Process

OUTPUT

Client Side

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Guide

Terraform (.tf) Formatter

Format and validate your Terraform configuration files directly in the browser. Paste any .tf code and get properly indented, consistently styled output that follows HashiCorp conventions. Supports resource blocks, variables, outputs, data sources, locals, and modules with optional alphabetical attribute sorting.

How to Use

Paste your Terraform code into the input area or upload a .tf file. Click Format to apply consistent indentation, spacing, and block structure. Enable “Sort Attributes Alphabetically” to reorder arguments within each block. The formatter validates HCL syntax and highlights any errors. Copy the formatted output or download it as a .tf file.

Features

HCL Formatting – Consistent indentation and spacing following HashiCorp style conventions
Syntax Validation – Detects malformed blocks, unclosed braces, and invalid HCL before formatting
Attribute Sorting – Optional alphabetical sorting of arguments within resource and data blocks
File Upload – Drag and drop .tf files directly for formatting
Full Block Support – Handles resource, variable, output, data, locals, module, provider, and terraform blocks
Try an Example – Load a sample Terraform config to see the formatter in action
Download Output – Save formatted code as a .tf file with one click

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 FAQ

What is Terraform and what is HCL syntax?

Terraform is an infrastructure-as-code tool by HashiCorp that lets you define cloud resources in declarative configuration files. It uses HCL (HashiCorp Configuration Language), designed to be both human-readable and machine-parseable. HCL uses blocks (like resource and variable), arguments (key = value pairs), and expressions. Proper formatting of HCL files improves readability and reduces merge conflicts in team environments.
Why is consistent code formatting important in infrastructure-as-code?

Consistent formatting in infrastructure-as-code is critical because these files define production infrastructure — misreading a configuration can lead to outages or security vulnerabilities. Standardized formatting reduces cognitive load during code reviews, makes diffs cleaner in version control, and ensures team members can quickly understand any configuration file.
What is the difference between terraform fmt and terraform validate?

terraform fmt only handles cosmetic formatting — indentation, alignment, and spacing — without checking whether the configuration is logically correct. terraform validate checks that the configuration is syntactically valid HCL and that resource arguments match the expected schema for each provider. A file can be perfectly formatted but invalid, or valid but poorly formatted. Both commands serve different purposes and are typically run in sequence in CI/CD pipelines.