A human-readable format commonly used for configuration files (Docker, Kubernetes, CI/CD).

YAML supports comments, uses indentation. JSON is more compact with stricter syntax.

Incorrect indentation (use spaces not tabs), missing colons, and improper quoting of special characters.

Why does indentation matter so much in YAML?

YAML uses indentation (spaces only, never tabs) to define structure instead of braces or brackets. Incorrect indentation changes the data hierarchy, causing parsing errors or silent data corruption.

How do I handle multi-line strings in YAML?

Use the pipe (|) for literal block scalars that preserve newlines, or the greater-than (>) for folded scalars that collapse newlines into spaces. Add a dash (|-) to strip the trailing newline.

YAML Formatter/Validator

Format, beautify, and validate your YAML

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About YAML

YAML (YAML Ain't Markup Language) is a human-readable data serialization format commonly used for configuration files.

It's popular in DevOps tools like Docker Compose, Kubernetes, Ansible, and CI/CD pipelines.

YAML uses indentation to denote structure, making it easy to read but sensitive to formatting.

YAML Formatter/Validator

About YAML

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