🧰Locly

JSON to YAML & YAML to JSON Converter

Convert between JSON and YAML formats instantly, processed locally in your browser

About This Tool

JSON (JavaScript Object Notation) and YAML (YAML Ain't Markup Language) are both popular data serialization formats. JSON is widely used in APIs and configuration, while YAML is preferred for configuration files due to its human-readable format. This tool converts between these formats instantly, with all processing processed locally in your browser - your data never leaves your device.

How to Use

  1. Paste JSON in the left panel or YAML in the right panel
  2. Click 'JSON → YAML' to convert JSON to YAML format
  3. Or click 'YAML → JSON' to convert YAML to JSON format
  4. The converted result appears in the opposite panel
  5. Use 'Copy' to copy the result to your clipboard

Common Use Cases

  • Configuration conversion: Convert config files between formats
  • API development: Convert API responses to YAML for documentation
  • DevOps: Convert between JSON and YAML for Kubernetes, Docker, etc.
  • Data migration: Transform data between systems using different formats
  • Documentation: Convert complex JSON to readable YAML for docs

FAQ

Q1: Is the conversion lossless?

For most data, yes. Both JSON and YAML can represent the same data structures. However, YAML supports features like comments and anchors that JSON doesn't, so YAML→JSON may lose some YAML-specific features.

Q2: Why does my YAML look different after round-trip conversion?

YAML has multiple valid representations for the same data. After converting to JSON and back, formatting preferences like quote styles, multiline strings, or indentation may differ from the original.

Q3: Does this support YAML comments?

YAML comments are preserved in the YAML panel but are lost when converting to JSON, as JSON doesn't support comments. This is a limitation of the JSON format, not the tool.

Q4: What YAML features are supported?

This tool supports standard YAML 1.2 features including objects, arrays, strings, numbers, booleans, null, multiline strings, and nested structures. Advanced features like anchors and aliases may have limited support.

Q5: Is my data secure?

Yes. All conversion happens locally in your browser using JavaScript. Your JSON/YAML data is never uploaded to any server, making it safe for converting sensitive configuration or data.

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