Convert YAML to JSON Online

Convert YAML to JSON.

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How to use

Paste or type your input in the left editor
Adjust options in the toolbar if available
Copy or download the output from the right pane

This free online tool runs entirely in your browser. No sign‑up, no server uploads.

About YAML to JSON Converter

Convert YAML to JSON.

The YAML to JSON converter uses a full YAML 1.2 parser to read the input, handling all YAML features including indentation-based nesting, flow collections, anchors and aliases, multi-line strings (literal and folded blocks), and type tags. The parsed data structure is then serialized to JSON with proper quoting of all keys and string values, conversion of YAML-specific types to JSON equivalents, and consistent formatting.

Use the left editor to enter your data. The output updates in real time. You can copy, clear, download, or expand either pane.

Tip: Use the search bar to quickly switch between tools.

Sample YAML

name: Jane
age: 29
skills:
  - js
  - html
  - css

Example input shown above. Output appears in the right pane instantly.

Why this tool?

Feature	YAML to JSON Converter	Typical alternatives
Free online tool	Yes	Often yes
Client‑side only (privacy)	Yes	Varies
No sign‑up required	Yes	Varies

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FAQs

How does the converter handle YAML anchors and aliases?

YAML anchors (&anchor) and aliases (*anchor) are fully resolved during conversion. The referenced data is duplicated in the JSON output since JSON does not support reference semantics. This produces a self-contained JSON document.

Does the converter support multi-document YAML files?

Multi-document YAML files (separated by ---) are supported. Each document is converted to a separate JSON object, and the output is presented as a JSON array containing all documents if multiple are detected.

How are YAML-specific types handled in JSON conversion?

YAML types like dates, timestamps, and binary data are converted to their JSON string equivalents since JSON has a simpler type system. Booleans (yes/no, true/false, on/off) are converted to JSON true/false. Null values (null, ~) become JSON null.

Can I convert Kubernetes YAML to JSON?

Yes. This is a common use case. Paste your Kubernetes YAML manifest and get valid JSON output that can be used with kubectl or the Kubernetes API directly. Multi-resource YAML files with --- separators are handled correctly.

Does the converter preserve comments from YAML?

JSON does not support comments, so YAML comments (lines starting with #) are discarded during conversion. If you need to preserve documentation, consider adding a dedicated metadata field in the JSON output.