JSON-YAML Converter

JSON↔YAML converter + JSON format/minify/validate/tree

100% In-BrowserNo Server UploadFree, No Signup

Data Conversion

Input (JSON)

Output (YAML)

How to Use

Choose a mode
Select JSON→YAML, YAML→JSON, JSON prettify/minify/validate, etc. from the toolbar.
Paste input and run
Paste JSON or YAML into the input area and click "Convert". You can also use "Swap" in conversion modes.
Copy result
Use the "Copy" button to copy the converted result to your clipboard.

JSON-YAML Converter Examples

JSON → YAML

Input

{
  "name": "John",
  "age": 30,
  "skills": ["JavaScript", "Python"]
}

Output

name: John
age: 30
skills:
  - JavaScript
  - Python

Select “JSON → YAML” in the toolbar, then convert.

YAML → JSON

Input

name: John
active: true
tags:
  - dev
  - ops

Output

{
  "name": "John",
  "active": true,
  "tags": [
    "dev",
    "ops"
  ]
}

Select “YAML → JSON” in the toolbar, then convert.

Features

Bidirectional JSON ↔ YAML conversion
JSON prettify/minify/sort keys/validate
JSON tree viewer
File load and download (JSON/YAML)
Local processing (your input is not sent to servers)
Mobile-friendly responsive design
Dark mode support

FAQ

What is the difference between JSON and YAML?

JSON uses braces {} and brackets [] and is widely used in APIs and web development. YAML is indentation-based and commonly used for configuration files (Docker Compose, Kubernetes, etc.). Both can represent the same data, but YAML is generally more human-readable.

Is my data sent to a server?

No. All conversion happens locally in your browser via JavaScript. Your input data is never transmitted to any external server.

Can I convert large JSON files?

Yes. You can convert large JSON files as long as your browser has sufficient memory. However, very large files (tens of MB) may slow down the browser.