YAML Converter — Convert YAML to JSON or XML Online Free

Convert YAML to JSON or XML instantly. Free, browser-based, no signup.

Input
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Output
JSON output will appear here...

YAML vs JSON

YAML and JSON represent the same data model — objects, arrays, strings, numbers, booleans, and null. YAML is more human-friendly: it supports comments, has less punctuation, and is easier to read for configuration files. JSON is more machine-friendly: it's a strict subset of JavaScript, universally supported in APIs, and has no ambiguity. Converting between them is lossless for data that both formats share, though YAML comments and anchors are lost when converting to JSON.

When to convert YAML to JSON

  • Sending Kubernetes config to an API endpoint that requires JSON
  • Debugging: JSON is easier to inspect in browser dev tools
  • Feeding YAML config into a JSON-only tool or library

For a full JSON toolkit — formatter, validator, minifier, and diff — visit JSON Indent.

When to convert JSON to YAML

  • Creating a Helm values file or Kubernetes manifest from a JSON API response
  • Making a config file more readable by switching from JSON to YAML
  • Adding comments to an existing JSON config (JSON doesn't support comments; YAML does)

Need to work with XML too? XML Indent offers XML formatting, validation, minification, diff, and XPath testing.

Frequently Asked Questions

Is YAML a superset of JSON?

Yes. YAML 1.2 is a strict superset of JSON — all valid JSON is also valid YAML. This means you can paste JSON directly into a YAML parser and it will work.

Are YAML comments preserved when converting to JSON?

No. JSON does not support comments. When converting YAML to JSON, all comments are discarded since there is no equivalent in JSON.

Is my data safe?

Yes. All conversion happens in your browser using js-yaml. No data is sent to any server.

How do I convert YAML to JSON in Python?

import yaml, json; print(json.dumps(yaml.safe_load(yaml_string), indent=2)). For browser-based conversion without writing code, use this tool.