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YAML ↔ JSON Converter

Convert between YAML and JSON instantly. Perfect for Kubernetes, Docker, GitHub Actions, and API workflows.

Indent:

How to Use

  1. 1. Select the conversion direction: YAML → JSON or JSON → YAML.
  2. 2. Paste your input in the left panel. The output appears instantly on the right.
  3. 3. Choose indent size (2 or 4 spaces) for formatted output.
  4. 4. Click Copy on the output panel to copy the result.
  5. 5. Switching direction swaps the current output back into the input — so you can round-trip your data.

About YAML ↔ JSON Converter

YAML and JSON are the two dominant data serialization formats in modern software development. JSON is the universal API and web format — compact, widely supported, and directly parseable in JavaScript. YAML is the human-friendly configuration format of choice for DevOps tools like Kubernetes, Docker Compose, GitHub Actions, Ansible, and Helm charts.

There are many situations where you need to convert between the two: sharing a Kubernetes manifest with an API that expects JSON, translating a JSON API response into a readable YAML config, or verifying that two representations of the same data are equivalent. Our converter handles this conversion bidirectionally with a single click.

The tool uses the industry-standard js-yaml library under the hood, which correctly handles all YAML specification features including multi-line strings, anchors (which are resolved and inlined in the output), explicit type tags, and complex nested structures. The indent control lets you choose between 2-space and 4-space indentation for the output.

All processing runs in your browser — your data never touches a server. The conversion is instantaneous as you type, making it ideal for rapid iteration when authoring configuration files or debugging API payloads.

You may also find our JSON Formatter, JSON to CSV, and JSON Diff helpful.

Frequently Asked Questions

What is YAML?

YAML (YAML Ain't Markup Language) is a human-readable data serialization format commonly used for configuration files in Docker, Kubernetes, GitHub Actions, Ansible, and many other tools. It uses indentation for structure instead of brackets and braces.

When would I convert YAML to JSON?

You might convert YAML to JSON when an API requires JSON input but your config is in YAML, when debugging a Kubernetes manifest by viewing it in JSON, or when using tools that only accept JSON.

Are there any limitations?

YAML supports some advanced features (like anchors, aliases, and multi-document streams) that have no direct JSON equivalent. Those features are handled gracefully — anchors are resolved, aliases are inlined.

Is my data sent to a server?

No. All conversion happens entirely in your browser using the js-yaml library. Your data never leaves your device.

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