JSON ↔ YAML Converter

Convert JSON to YAML and YAML to JSON instantly in your browser. This page is useful for everyday config and payload work: turning strict JSON into a more readable YAML layout, or converting YAML back into JSON for systems that require braces, brackets, and quoted keys.

Data

Try it

Examples

JSON → YAML config example

Input

{"app":{"name":"demo","port":8080,"features":["search","reports"]}}

Output

app:
  name: demo
  port: 8080
  features:
    - search
    - reports

YAML → JSON list example

Input

servers:
  - host: app-1
    port: 443
  - host: app-2
    port: 8443

Output

{
  "servers": [
    {
      "host": "app-1",
      "port": 443
    },
    {
      "host": "app-2",
      "port": 8443
    }
  ]
}

When to use JSON ↔ YAML conversion

Use JSON → YAML when you want a strict payload in a more human-readable layout for review, documentation, or config editing. Use YAML → JSON when a config snippet, manifest, or list structure needs to be turned back into strict JSON for APIs, scripts, test fixtures, or systems that accept JSON but not YAML.

What the converter preserves and what may change

For common objects, arrays, strings, numbers, booleans, and null values, the converted result should preserve the data structure even though the formatting style changes. Indentation, quote style, and other presentation details may differ because the output is normalized to the formatter used on this page rather than mirroring the exact style of the pasted input.

Supported input patterns

This page is most useful for everyday structured data: nested objects or mappings, arrays or sequences, and normal scalar values such as strings, numbers, booleans, and null. It is intended for common config and payload conversion rather than every advanced feature or formatting nuance available in the full YAML ecosystem.

Common conversion issues

JSON input often fails because of trailing commas, missing braces or brackets, or copied text that is not valid JSON. YAML input often fails because of inconsistent indentation, broken list structure, missing colons, or pasted prose mixed with data. Comments and formatting style also do not survive a round-trip as-is because JSON and YAML do not store presentation the same way.

JSON vs YAML for everyday tasks

Before You Rely on Converted YAML

Before pasting the output into another system, confirm that the destination accepts the YAML style produced here and that indentation-sensitive tools interpret the values the way you expect. Structure can survive conversion while consumer-specific formatting expectations still differ.

What Changes When JSON Becomes YAML

The converted YAML may use different quoting, indentation, and scalar presentation even when the structure is equivalent to the original JSON. That can improve readability, but it also means you should not expect the output to preserve the exact visual style of the source text.

How to Interpret the YAML Output Safely

Treat the YAML output as a readable structural representation of the same underlying data, not as proof that every downstream YAML consumer will display or interpret it exactly the same way. Review indentation, list structure, and scalar formatting before reusing the result in a real config or deployment workflow.

JSON is common in APIs, browser tools, and machine-oriented data exchange. YAML is often easier for people to read and edit in configuration-style documents. This page is helpful when you need to move the same underlying structure between those two common representations without opening another editor or conversion service.