JSON to YAML Converter

Convert JSON to YAML for free — paste JSON or open a file and get clean, readable block-style YAML for Kubernetes, Docker Compose, GitHub Actions, OpenAPI and other config files. Choose 2 or 4 space indentation and optional A–Z key sorting; strings that YAML would misread (yes/no, version numbers, colons) are quoted automatically. JSON errors show the exact line and column.

100% private — everything runs in your browser. Conversion happens on your device; nothing is uploaded.

Indent

Sort keys A–Z

Open file

JSON

YAML

Converted with the open-source js-yaml library (MIT); strings that would be misread (like “yes”, “1.0” or ones containing colons) are quoted automatically. Runs in your browser — config files never leave your device.

How to convert JSON to YAML

Paste your JSON or click Open file.
Pick the indent and whether to sort keys.
Read the YAML as you type.
Copy it or download the .yaml file.

What you can use it for

Write Kubernetes and Docker Compose configs from JSON
Convert package.json-style data to YAML
Create GitHub Actions and CI configuration
Make OpenAPI / Swagger specs easier to read

More free tools

Building for the web?

Format, minify, convert and generate code with our free, private developer tools.

JSON Formatter CSS Minifier HTML Minifier JS Minifier SVG Optimizer CSS Grid Box Shadow Gradient Generator

See all free tools →

Frequently asked questions

Is YAML a superset of JSON?

Mostly — valid JSON is valid YAML 1.2, but block-style YAML is far easier to read and edit, which is why configs use it.

Why are some values in quotes?

Values like “yes”, “on” or “1.10” would change type or meaning in YAML, so they're quoted to keep them as strings.

Can I convert YAML back to JSON?

Yes — use the YAML to JSON converter.

Is my data uploaded?

No. It's converted in your browser — nothing is sent to a server.