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Developer tools·Data Formats

JSON ↔ YAML Converter

Convert between JSON and YAML with readable formatting and error messages. Fully client-side — no account, uploads, or remote storage.

Added Apr 29, 2026

Input

Result

Enter a value for convert to see your result.

How it works

Converts data between JSON (JavaScript Object Notation) and YAML (YAML Ain't Markup Language) formats. Both formats represent the same data structures but have different syntax — JSON uses braces and quotes while YAML uses indentation.

Step by step

  1. 01Select the conversion direction: JSON → YAML or YAML → JSON.
  2. 02Paste your input data into the text area.
  3. 03The tool parses the input and serialises it in the target format.
  4. 04Copy the output to use in your project.

Examples

JSON to YAML

JSON objects become YAML mappings with key: value syntax, no quotes needed for simple strings.

Inputs

Convert:
json-to-yaml
Input:
{"name":"Alice","age":30}

Result

Output:
name: Alice age: 30
Note: YAML is a superset of JSON — any valid JSON is also valid YAML. This tool supports a common YAML subset: mappings, sequences, strings, numbers, booleans, and null.

Related guides

  • What Is JSON?

    Learn what JSON (JavaScript Object Notation) is, how to read and write it, common syntax errors, and best practices for using JSON in APIs and configuration.

  • YAML or JSON -- Which Format Should You Use?

    YAML or JSON -- Which Format Should You Use? -- JSON is strict, ubiquitous in APIs, and easy for machines to parse. YAML is human friendly for config files.

  • JSON vs XML — When to Use Each Format

    A direct comparison of JSON and XML covering syntax, verbosity, data types, namespaces, and schema validation — with clear guidance on when to use each format.

Frequently asked questions

What is the difference between JSON and YAML?

JSON uses curly braces, square brackets, and quoted strings. YAML uses indentation and colons. YAML is generally more human-readable and supports comments; JSON is more widely supported in APIs and configuration files.