Free Online YAML Formatter
Format, beautify, validate, and minify YAML code instantly. Supports syntax highlighting and validation.
description Input YAML
code Output Result
Key Features
Syntax Highlighting
Color-coded keys, values, comments, and list items for easy reading and editing.
Comprehensive Validation
Check for mixed tabs/spaces, missing colons, duplicate keys, orphaned indentation, and unclosed brackets.
Fast Processing
Instantly format or compact YAML configuration files of any size right in your browser.
Privacy Protected
All processing happens in your browser. No data is sent to servers.
Frequently Asked Questions
Getting Started
What is a YAML formatter?
A YAML formatter normalizes indentation, spacing, and structure in YAML documents so they are consistent and easy to read. It helps prevent parsing errors caused by inconsistent whitespace.
Is this YAML formatter free?
Yes. All tools are completely free and run locally in your browser. No signup, no limits, no hidden costs.
Does the tool store my data?
No. Your YAML data never leaves your browser. All processing happens locally on your device, ensuring complete privacy and security.
Features & Usage
How do I format YAML?
Paste your YAML into the input area and click the "Format YAML" button. The tool will normalize all indentation to consistent 2-space levels.
What is YAML minification?
Minification removes empty lines, trailing whitespace, and unnecessary blank space to produce a more compact document. Click "Minify Code" to compress your YAML.
Can I validate my YAML?
Yes! Click the "Validate" button to check for syntax errors including mixed tabs/spaces, missing colons, duplicate keys, orphaned indentation, and unclosed brackets.
Troubleshooting
Can I use this for Docker Compose or Kubernetes?
Yes. Any valid YAML document works, including docker-compose.yml, Kubernetes manifests, Ansible playbooks, and GitHub Actions workflows.
Can I use this tool offline?
Yes! Once you've visited the page, all functionality works offline thanks to service workers and local processing.