JSON to YAML Converter - Convert JSON to YAML Online

JSON → YAML

About the JSON ↔ YAML playground

The JSON ↔ YAML converter transforms data between JSON and YAML in either direction. Paste JSON to get clean, indented YAML, or paste YAML to get strict JSON — the conversion preserves objects, arrays, strings, numbers, booleans, and null. This is handy when moving configuration between systems, since many tools accept one format but not the other, and YAML is often preferred for human-edited config files.

JSON is a compact, brace-and-bracket data format that is ubiquitous in APIs. YAML (YAML Ain't Markup Language) is a superset of JSON that uses indentation instead of braces, supports comments, and is generally easier for people to read and write. Because every JSON document is also valid YAML, conversion is lossless for the shared data model; the converter simply re-expresses the same structure in the target syntax.

HostedJSON ↔ YAML runtime

mainentry file

single fileworkspace

stdinprogram input

How it works

Write

The main file is the entry point for each run.

Give it input

Use the Input panel to pipe standard input to your program when it needs data.

Run

Run sends your code to a fresh hosted runtime and streams the result into the output panel.

Keep or share

Your draft stays in this browser, and Share creates a separate snapshot link.

External resources

yaml.org— Official website

Input (JSON)

{
  "name": "Ada",
  "active": true,
  "roles": ["admin", "author"]
}

Output (YAML)

name: Ada
active: true
roles:
  - admin
  - author

Input (YAML)

server:
  host: localhost
  port: 8080
  tags:
    - web
    - api

Output (JSON)

{
  "server": {
    "host": "localhost",
    "port": 8080,
    "tags": ["web", "api"]
  }
}

Input (JSON with null & nesting)

{
  "db": {
    "name": "app",
    "replica": null,
    "ports": [5432, 5433]
  }
}

Output (YAML)

db:
  name: app
  replica: null
  ports:
    - 5432
    - 5433

Input (YAML array of objects)

users:
  - name: Ada
    age: 36
  - name: Linus
    age: 54

Output (JSON)

{
  "users": [
    { "name": "Ada", "age": 36 },
    { "name": "Linus", "age": 54 }
  ]
}

Input (JSON)

{
  "title": "Hello: World",
  "count": 0,
  "enabled": false
}

Output (YAML)

title: "Hello: World"
count: 0
enabled: false

Input (YAML with quoted zip)

address:
  city: Paris
  zip: "01234"

Output (JSON)

{
  "address": {
    "city": "Paris",
    "zip": "01234"
  }
}

Input (JSON nested arrays)

{
  "matrix": [[1, 2], [3, 4]],
  "labels": []
}

Output (YAML)

matrix:
  - - 1
    - 2
  - - 3
    - 4
labels: []

json

yaml

Output

YAML output

JSON ↔ YAML Converter

Write

Give it input

Run

Keep or share

Editing

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