terraform/website/source/docs/commands/fmt.html.markdown

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---
layout: "docs"
page_title: "Command: fmt"
sidebar_current: "docs-commands-fmt"
description: |-
The `terraform fmt` command is used to rewrite Terraform configuration files to a canonical format and style.
---
# Command: fmt
The `terraform fmt` command is used to rewrite Terraform configuration files
to a canonical format and style.
## Usage
Usage: `terraform fmt [options] [DIR]`
By default, `fmt` scans the current directory for configuration files. If
the `dir` argument is provided then it will scan that given directory
instead. If `dir` is a single dash (`-`) then `fmt` will read from standard
input (STDIN).
The command-line flags are all optional. The list of available flags are:
* `-list=true` - List files whose formatting differs
* `-write=true` - Write result to source file instead of STDOUT
* `-diff=false` - Display diffs instead of rewriting files