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brew install cfn-formatlocal Homebrew formula metadata
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Install cfn-format with Homebrew
Command-line tool for formatting AWS CloudFormation templates. Version 1.24.4 via Homebrew; verified 2026-07-25.
install
Additional install commands
overview
Package summary
Command-line tool for formatting AWS CloudFormation templates
Project links
Commands and aliases
- cfn-format
history
Project history and usage
cfn-format is the Homebrew-packaged command built from the AWS CloudFormation rain repository's `cmd/cfn-format`, focused on checking and formatting AWS CloudFormation templates.
Project history
The upstream rain repository was created in 2019 and describes rain as a development workflow tool for AWS CloudFormation templates and stacks. Its README lists consistent formatting of CloudFormation templates as a key feature of `rain fmt`, including JSON/YAML conversion and YAML comment preservation.
Adoption history
Homebrew packages `cfn-format` separately from rain, building the `./cmd/cfn-format` target from the rain source repository. This gives package users a narrower formatter binary without installing the broader rain workflow CLI name.
How it is used
The Homebrew formula test runs `cfn-format -v test.template` and expects a formatted-ok message. The rain README documents the broader formatter behavior under `rain fmt`.
Why package nerds care
cfn-format is package-nerd-interesting because it exposes one subcommand-sized slice of a larger CloudFormation workflow tool as its own formula, the kind of tiny binary split that helps scripts depend on exactly the formatter they need.
Timeline
- 2019: rain GitHub repository metadata records public repository creation.
- 2019: GitHub release metadata records rain v0.1.0.
- 2026: Homebrew formula builds cfn-format from rain v1.24.4.
Related projects
- rain is the upstream project and broader CloudFormation workflow CLI.
- cfn-flip is the older AWS Labs converter whose CLI usage now points users to `rain fmt`.
Sources
security posture
Risk level: orange
infrastructure mutation or orchestration signal.
Risk classifier
orange risk · medium confidence · infrastructure
Why
- infrastructure mutation or orchestration signal
Signals
- text:cloud
Install behavior
- No Homebrew bottle metadata was recorded.
Recommended review
Before unattended agent use, check whether the tool reads plaintext credentials, writes remote state, publishes artifacts, or shells out to plugins.
executables
Installed executables
| Command | Kind | Exposure | Note |
|---|---|---|---|
cfn-format | executable | indexed executable | Discovered from the local executable index. |
freshness
Version and freshness
These signals separate page generation age, package-manager activity, and upstream release comparison. Version lag is warned only when an evidence URL and comparable versions are present.
page generated2026-08-03
manager version1.24.4
manager updated2026-07-25
local dataunknown
upstreamnot available
latest detectednot detected
- okNo freshness warnings were generated.
install metadata
Package metadata
| Package key | brew:cfn-format |
|---|---|
| Version | 1.24.4 |
| Package manager | Homebrew |
| Homepage | https://github.com/aws-cloudformation/rain |
| Repository | https://github.com/aws-cloudformation/rain |
| Last updated | 2026-07-25T14:20:49-04:00 |
| Pulse | updated |
| Bottle | not recorded |
| Service | none declared |
source trail
Generated from repository data
This page is generated by av-web from the private package SQLite artifact built by scripts/generate-pkg-sqlite.py.
Combined YAML source
View the package source record on GitHub.
Used sources
- Geiger risk classifier
- cross-ecosystem install command graph
- curated package history
- pkg.so package database
- pkgdb category and tag curation