JSON to YAML Converter

Paste JSON and get YAML output instantly. Supports nested objects, arrays, and all YAML scalar types.

11 lines

JSON Input

YAML Output

name: John Doe
age: 30
developer: true
languages:
  - JavaScript
  - Python
  - Go
address:
  city: San Francisco
  zip: "94102"
tags: null

Frequently Asked Questions

What is YAML and when should I use it instead of JSON?

YAML (YAML Ain't Markup Language) is a human-readable data serialization format. It's preferred over JSON for configuration files (Kubernetes, Docker Compose, GitHub Actions, Ansible) because it's less verbose and supports comments.

Does this tool support nested objects and arrays?

Yes. The converter recursively handles any depth of nested objects, arrays (including arrays of objects), and all scalar types: strings, numbers, booleans, and null.

Are special characters in strings handled correctly?

Yes. Strings that contain YAML special characters (colons, hashes, brackets, etc.) are automatically quoted to ensure the output is valid YAML.

Is my data sent to a server?

No. All conversion happens entirely in your browser using JavaScript. Your JSON data never leaves your device.

Can I convert YAML back to JSON?

Yes! Use our YAML to JSON Converter tool available at /tools/converters/yaml-to-json.

JSON vs YAML: Key Differences

Feature	JSON	YAML
Syntax	Brackets, quotes everywhere	Indentation-based, minimal punctuation
Comments	Not supported	# comment syntax supported
Multi-line text	Escape \n in strings	Block scalars: \| (literal) or > (folded)
Anchors & aliases	Not supported	&anchor / *alias for DRY config
Primary use	APIs, data exchange	Config files, CI/CD, Kubernetes

YAML Syntax Primer

# Mapping (object)
name: Alice
age: 30
active: true

# Sequence (array)
tags:
  - typescript
  - nodejs

# Nested mapping
address:
  city: Berlin
  zip: "10115"  # quoted to keep as string

# Multi-line string (literal block)
description: |
  Line one.
  Line two.