📄

YAML Formatter

Format, validate, and beautify YAML documents. Perfect for Kubernetes and Docker configs.

YAML formatterYAML validatorYAML beautifierYAML parser
Indent:
Input YAML
Formatted YAML
name: John Doe
age: 30
email: john@example.com
address:
  street: "123 Main St"
  city: New York
  zip: "10001"
hobbies:

config:
  debug: true
  timeout: 30
  features:

What is YAML Formatter?

YAML Formatter is a free online tool that formats and validates YAML (YAML Ain't Markup Language) documents. It ensures proper indentation and structure, which is crucial since YAML relies on whitespace for its syntax. Perfect for developers working with Docker, Kubernetes, CI/CD pipelines, and configuration files.

Common Use Cases

Kubernetes Configs

Format and validate Kubernetes deployment, service, and ingress YAML files.

Docker Compose

Clean up docker-compose.yml files for better readability.

CI/CD Pipelines

Format GitHub Actions, GitLab CI, or Jenkins pipeline configurations.

Ansible Playbooks

Validate and format Ansible playbook and inventory files.

How to Use This Tool

  1. Paste your YAML content into the editor
  2. Click "Format" to validate and beautify
  3. Fix any errors highlighted by the validator
  4. Copy the formatted YAML for use in your project

Frequently Asked Questions

Why is YAML indentation important?
YAML uses indentation to define structure. Incorrect indentation will cause parsing errors and unexpected behavior.
Can I convert YAML to JSON?
Yes! Use our JSON-YAML Converter tool to convert between formats.
What causes "mapping values are not allowed here"?
This error usually occurs when colons appear in values without proper quoting or when indentation is inconsistent.

YAML Formatter is a free online tool that requires no signup or installation. It works directly in your browser, keeping your data private and secure.