YAML Validator

Validate & Format YAML

Validate YAML syntax, format your YAML code, and view the parsed data structure.

Input YAML

Paste your YAML code

1 lines0 characters

YAML Syntax

Use 2 spaces for indentation
Key-value pairs: key: value
Arrays: - item
Comments: # comment

Features

Validate YAML syntax
Format YAML code
View parsed data structure
Error detection with messages
Copy formatted output
Download formatted YAML
JSON conversion
Line & character count

Common YAML Errors

Indentation:

YAML is indentation-sensitive. Use consistent 2-space indentation.

Colons:

Always add a space after colons in key-value pairs.

Arrays:

Array items must start with "- " (dash followed by space).

Quotes:

Use quotes for strings with special characters like colons.

Use Cases

Configuration files (Docker, Kubernetes)
CI/CD pipelines (GitHub Actions, GitLab CI)
Application settings
Data serialization
API documentation (OpenAPI)
Infrastructure as Code (Ansible)
Package management (npm, pip)
Static site generators (Jekyll, Hugo)

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