JSON to YAML Converter - Convert JSON to YAML Online

JSON Input

YAML Output

What is JSON to YAML Converter?

Need to convert your JSON (JavaScript Object Notation) to YAML (YAML Ain't Markup Language)? This tool does that instantly. YAML is human-readable and great for configuration files, while JSON is perfect for APIs. Convert between them whenever you need.

According to MDN Web Docs, both JSON and YAML are popular data formats. YAML is often used in config files (like Docker Compose, Kubernetes, or CI/CD pipelines), while JSON is standard for APIs. The part people get bitten by is YAML's loose typing. A JSON string like "no", "0123" or "2024-01-15" would turn into a boolean, a number or a date if written bare, so the converter quotes it. Long integers such as a 19-digit ICCID are written with every digit intact.

Everything happens in your browser, so nothing you paste is uploaded. The output uses two-space indentation and block style, which is what YAML tools and reviewers expect. Key order is kept exactly as in your JSON.

How to Use the JSON to YAML Converter

Paste, check, copy. The YAML updates as you type.

Paste, Upload, or Load Sample

Paste JSON into the left panel, or click Upload to load a file. Click Sample to see example telecomm subscriber JSON. Example:

{"subscriberId": "SUB-1001", "plan": "Unlimited 5G", "dataUsage": 45.2, "status": "active", "carrier": "Verizon"}

View YAML Output

The right panel shows the YAML output instantly. Structure is preserved. Invalid JSON shows an error before conversion.

Download or Copy

Click Download to save as .yaml, or Copy to clipboard. Use Clear to start fresh. All processing runs in your browser.

When You'd Actually Use This

Config File Conversion

Convert JSON configs to YAML for Docker Compose, Kubernetes, or CI/CD pipelines. YAML is more readable for configuration files.

API to Config

Got JSON from an API that needs to be a YAML config? Convert it quickly. Great for generating config files from API responses.

Format Preference

Some teams prefer YAML for its readability. Convert JSON to YAML when you need that human-friendly format for configs or documentation.

Tool Compatibility

Some tools require YAML format. Convert your JSON data to YAML when working with tools like Ansible, Kubernetes, or GitHub Actions.

Common Questions

Is my JSON data stored?

Nope. Everything happens right in your browser. Your JSON never leaves your computer – we don't even see it.

What JSON formats work?

The converter works with any valid JSON structure – objects, arrays, nested objects, and mixed types. It analyzes the structure and converts it to equivalent YAML.

How are nested objects handled?

Nested objects become properly indented YAML structures. Arrays stay as arrays, and all data types (strings, numbers, booleans, null) are preserved correctly.

Can I convert YAML back to JSON?

Yep. Use our YAML to JSON converter to convert YAML files back to JSON format.

What if my JSON has special characters?

Strings that contain colons, #, quotes or leading spaces are quoted so YAML reads them back as the same string. Strings YAML would otherwise reinterpret (yes, off, ~, null, 0123, 1e3, dates) are quoted too. Bare yes and off were booleans in YAML 1.1. The YAML 1.2.2 spec narrowed booleans to true and false, but plenty of parsers still read files the 1.1 way, so quoting is the only choice that is safe everywhere.

Does it work with large datasets?

A few MB of JSON converts in well under a second. Parsing happens in your browser's memory, so for files in the hundreds of MB, yq -P on the command line is the better tool.

Other JSON Tools You Might Need

Conversion is just one JSON task. Here are other tools that work well together: