Prettify YAML

Format and beautify YAML files with clean 2-space or 4-space indentation. Normalizes nested structures, sequences, and mappings with optional alphabetical key sorting.

Private • In-browser processing • Zero server uploads

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How to Use Prettify YAML

1
Paste YAML
Paste your messy or unformatted YAML text into the input field.
2
Choose Spacing & Sorting
Select 2 or 4 spaces and toggle alphabetical key sorting if desired.
3
Copy Clean YAML
The beautified YAML is instantly ready to copy or download.

Key Features

Standardized Indentation
Re-formats irregular spacing and messy indentation into clean 2-space or 4-space blocks.
Alphabetical Key Sorting
Alphabetizes object keys recursively to produce easily readable, Git-diff-friendly YAML manifests.
Syntax Normalization
Formats block scalars, arrays, and nested structures consistently across the entire file.
Safe Client-Side Formatting
Executes locally in your web browser with zero server latency or data exposure.

Common Use Cases

  • Cleaning up messy Helm charts, Docker Compose, or Ansible playbooks.
  • Standardizing indentation before committing YAML configuration files into version control.
  • Diffing two versions of a configuration file with sorted keys.
  • Formatting Swagger and OpenAPI API definitions for documentation.

Frequently Asked Questions

2 spaces per indentation level is the universal industry standard for YAML documents, widely adopted by Kubernetes, Docker, Ansible, and GitHub Actions.

Key sorting is optional! You can toggle 'Sort object keys alphabetically' on or off according to your preference.

Prettifying parses the structural data model; therefore, standalone comments may be stripped in the normalized output. Use the Validate YAML tool if you wish to inspect syntax while preserving original comments.

Validate YAML
Check if a YAML document is valid and show a formatted parse tree.
YAML to JSON
Convert a YAML document to equivalent JSON format.
JSON to YAML
Convert a JSON document to YAML format.
Prettify JSON
Format, minify, validate or sort keys of any JSON — live in your browser.
Prettify XML
Format and indent an XML document for easy reading.