YAML Formatter & Validator

Format, prettify, validate YAML data, and convert to JSON. Essential for DevOps and configuration management.

Input
Paste your YAML here
Output
Formatted YAML

What is YAML?

YAML (YAML Ain't Markup Language) is a human-friendly data serialization language. It's commonly used for configuration files and data exchange where human readability is important.

Why Use YAML?

  • Human-readable - Clean, minimal syntax
  • No brackets or quotes - Uses indentation for structure
  • Comments - Supports inline comments with #
  • Wide adoption - Used in Docker, Kubernetes, CI/CD tools, and more

Features of This Tool

Format/Prettify

Normalizes indentation and formatting for consistent YAML structure.

Minify

Converts to a compact single-line format (flow style).

Convert to JSON

Transforms YAML to equivalent JSON format.

YAML Syntax

Basic Types

string: Hello World
number: 42
float: 3.14
boolean: true
null_value: null

Collections

# List
fruits:
  - apple
  - banana
  - orange

# Dictionary
person:
  name: John
  age: 30

Multi-line Strings

# Literal block (preserves newlines)
description: |
  Line 1
  Line 2

# Folded block (joins lines)
summary: >
  This is a long
  sentence on multiple lines.

Common Use Cases

  • Docker Compose files
  • Kubernetes manifests
  • GitHub Actions workflows
  • Ansible playbooks
  • CI/CD configurations (Travis CI, CircleCI)