YAML Validator

Validate YAML syntax against the YAML 1.2 spec.

YAML Input74 chars
click Validate to check

Related Tools

YAML Formatter

Format and validate YAML with 2-space or 4-space indentation.

YAML Parser

Parse YAML and inspect the resulting document structure.

Frequently Asked Questions

What does this check?▾

It parses your YAML against the YAML 1.2 specification and reports whether it's syntactically valid, with the exact line and column of any error.

What are "Total Keys" and "Max Depth"?▾

On valid input, the total number of map keys across the whole document and the deepest level of nesting — the same stats the JSON Validator reports, adapted for YAML.

What's the most common YAML mistake?▾

Mixing tabs and spaces for indentation — YAML requires consistent spaces, since indentation itself carries structural meaning.

Is my YAML uploaded anywhere?▾

No — validation runs entirely in your browser via js-yaml.