YAML Formatter
Format and validate YAML online for free. Pretty-print YAML with proper indentation instantly. No signup required - runs entirely in your browser.
How to Use This YAML Formatter
- Paste your YAML code into the input area
- The formatter will automatically beautify your YAML with proper indentation
- Click "Copy" to copy the formatted YAML to your clipboard
- If there's a syntax error, you'll see a helpful error message
What is YAML?
YAML (YAML Ain't Markup Language) is a human-readable data serialization language commonly used for configuration files. It's widely used in DevOps tools like Docker, Kubernetes, and CI/CD pipelines. Proper YAML formatting is crucial as indentation affects the data structure.
Features
- Instant YAML formatting and validation
- Proper indentation (2 spaces)
- Syntax validation with clear error messages
- Auto-format as you type
- One-click copy to clipboard
- 100% client-side processing
Common Use Cases
- Formatting Docker Compose files
- Cleaning up Kubernetes manifests
- Validating CI/CD pipeline configurations
- Debugging YAML syntax errors
- Preparing YAML for documentation
Frequently Asked Questions
Is my YAML data private?
Yes, all formatting happens entirely in your browser. Your YAML configuration files, secrets, and data are never sent to any server. The tool runs 100% client-side, making it safe for formatting Kubernetes manifests, Docker Compose files, and other sensitive configurations.
Does it validate YAML syntax?
Yes, the formatter includes YAML syntax validation. If your YAML contains errors such as incorrect indentation, invalid characters, or structural issues, it will display a clear error message to help you identify and fix the problem quickly.
How does indentation work in YAML?
In YAML, indentation is significant and defines the structure of your data. The formatter uses 2-space indentation, which is the most common standard. It will automatically fix inconsistent indentation, ensuring your YAML is properly structured and readable.