JSON to YAML Converter

Fast, free & browser-based conversion from JSON to YAML format.

What is a JSON to YAML Converter?

A JSON to YAML Converter is an online tool that transforms structured data written in JSON (JavaScript Object Notation) into its equivalent YAML (YAML Ain’t Markup Language) format. JSON and YAML are two widely used data-interchange formats that allow humans and machines to easily read and write structured information. This tool simplifies that conversion instantly and directly in your browser — no logins, no tracking, and no file uploads required.

What is JSON?

JSON (JavaScript Object Notation) is a lightweight data format commonly used to exchange information between a web server and a client, especially in APIs and web applications. It is language-independent but often used with JavaScript, Python, PHP, and many other programming languages. JSON data is structured with curly braces, key-value pairs, square brackets for arrays, and is very strict about syntax (e.g., no comments allowed).

{
  "user": {
    "name": "John",
    "age": 30,
    "skills": ["HTML", "CSS", "JavaScript"]
  }
}

What is YAML?

YAML stands for "YAML Ain’t Markup Language" and is a human-friendly data format often used for configuration files and data serialization in DevOps, Kubernetes, Docker Compose, GitHub Actions, and more. YAML is indentation-based, does not require brackets or commas, and supports comments, making it easier to read and maintain than JSON.

user:
  name: John
  age: 30
  skills:
    - HTML
    - CSS
    - JavaScript

Why Convert JSON to YAML?

• More readable: YAML's indentation-based syntax removes the clutter of brackets and commas.
• Supports comments: Unlike JSON, YAML allows inline comments (using #).
• Industry standard: YAML is the default for Kubernetes, Ansible, Docker Compose, and many modern DevOps tools.
• Cleaner configs: YAML is ideal for writing clean, scalable configuration files.

How This Tool Works

Paste your JSON into the input box and click Convert. This tool uses the popular open-source js-yaml library right in your browser to parse and convert the data. Nothing is uploaded or saved — all conversion happens securely and privately on your device.

Example Conversion

Input JSON:

{
  "name": "Alice",
  "age": 25,
  "languages": ["English", "Spanish"]
}

Converted YAML:

name: Alice
age: 25
languages:
  - English
  - Spanish

Who Should Use This Tool?

• Developers writing infrastructure-as-code files (e.g., docker-compose.yaml, config.yaml)
• DevOps professionals configuring CI/CD pipelines in GitHub Actions, Ansible, CircleCI, etc.
• Backend engineers creating Kubernetes manifests or Helm charts
• Technical writers documenting APIs or transforming datasets
• Anyone learning or working with JSON and YAML formats

Benefits of This Converter

• No sign-up, no ads, no uploads — privacy-first tool
• Instant conversion with syntax-safe output
• Open-source js-yaml powered — fast & reliable
• Readable YAML output that works with most tools and platforms