What is YAML Formatter?

YAML Formatter validates, formats, and converts YAML data. YAML (YAML Ain't Markup Language) is a human-readable data serialization standard commonly used for configuration files, API specifications, and data exchange. This tool helps you ensure your YAML is valid and properly formatted, and can convert between YAML and JSON formats.

How to Use YAML Formatter

Paste your YAML - Copy and paste your YAML into the editor
Validate - The tool automatically checks for syntax errors
Format - Click prettify to format with proper indentation
Convert - Convert between YAML and JSON as needed
Copy result - Copy the formatted or converted output

YAML Formatter Features

Real-time validation - Instantly checks YAML syntax
Prettify mode - Proper indentation and formatting
Minify mode - Compact YAML output
YAML to JSON - Convert YAML to JSON format
JSON to YAML - Convert JSON to YAML format
Error highlighting - Shows exact location of syntax errors

Frequently Asked Questions

What is YAML used for?

YAML is commonly used for configuration files in applications like Docker, Kubernetes, Ansible, and CI/CD pipelines. It's also used for API specifications (OpenAPI), data serialization, and anywhere human-readable structured data is needed.

Should I use YAML or JSON?

Choose YAML when human readability and editing are priorities. YAML supports comments, has a cleaner syntax without braces, and is easier for non-technical users. Use JSON when you need strict parsing, wide language support, or when working with web APIs.

Why is my YAML showing errors?

Common YAML errors include incorrect indentation (spaces, not tabs), missing colons after keys, unquoted strings that look like other types, and special characters in unquoted strings. The error message will indicate the line number where the problem was detected.