YAML to JSON Converter

Transform YAML data into clean JSON format with customizable indentation.

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What is YAML to JSON Conversion?

YAML to JSON conversion transforms YAML (YAML Ain’t Markup Language) data into JSON (JavaScript Object Notation) format. This is useful when you need to programmatically process configuration files written in YAML.

This tool features:

  • Custom indentation — Choose between 2 or 4 spaces for the JSON output.
  • Error reporting — Detailed syntax errors with line and column numbers.
  • Preserves data types — Strings, numbers, booleans, arrays, and nested objects are all handled correctly.
  • Full YAML 1.1 support — Powered by js-yaml library.

How to Use

  1. Paste your YAML — Copy and paste any valid YAML data into the input textarea. You can also click Load Example to load sample data.
  2. Choose indentation — Select 2 or 4 spaces for the output JSON formatting.
  3. Convert — Click Convert to JSON to generate the JSON output.
  4. Copy or download — Use the copy button on the output area or click Download .json to save the result as a file.

Frequently Asked Questions

What YAML features are supported?

This tool supports YAML 1.1 including mappings, sequences, strings, numbers, booleans, null values, multi-line strings, anchors, aliases, and custom tags.

Why convert YAML to JSON?

Many APIs and programming languages work natively with JSON. Converting YAML to JSON is common when migrating configuration files, debugging YAML parsing, or integrating with JSON-based tools and services.

Is this tool safe for sensitive data?

Yes. All processing happens entirely in your browser using JavaScript. Your YAML data is never uploaded to any server, stored in any database, or logged.

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Last updated: 17 Aug 2026

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