b2KIT

YAML to JSON Converter

Convert YAML configuration files to JSON format with validation and formatting.

How to Use YAML to JSON Converter

  1. 1

    Paste your YAML

    Enter the YAML content you want to convert to JSON.

  2. 2

    Convert instantly

    See the JSON output generated automatically from the YAML.

  3. 3

    Copy the JSON

    Click copy to grab the converted JSON output.

Tested tool guide Developer and data tools Checked July 30, 2026

What YAML to JSON Converter does, with a checked example

This converter handles common YAML mappings, sequences, nested indentation, comments, quoted strings, numbers, Booleans, and null values. It then serializes the parsed value as JSON with optional indentation. The parser is intentionally lightweight, so the page is best for straightforward configuration rather than every feature in the YAML specification.

Worked example

A concrete input and expected output from the current implementation.

Input

enabled: true
retries: 3
regions:
  - us-east
  - eu-west

Expected output

{
  "enabled": true,
  "retries": 3,
  "regions": [
    "us-east",
    "eu-west"
  ]
}

Boolean and numeric scalars retain their types. The indented dash items become a JSON array under regions.

How the result is produced

1

Indentation creates structure

Sibling keys must align at the same indentation level. Deeper indentation creates a nested mapping or sequence, and tabs should be avoided because their visual width is ambiguous.

2

JSON has a smaller feature set

Anchors, aliases, custom tags, complex keys, and some multiline scalar behavior cannot be represented directly by this lightweight conversion path.

Good uses

  • Inspect a simple application configuration as JSON.
  • Prepare sample data for an API that accepts JSON only.
  • Check whether indentation produces the expected nesting.

Limits and checks

  • Quote strings that could otherwise be interpreted as numbers or Booleans.
  • Secrets remain sensitive even when conversion happens locally.
  • Use a full YAML 1.2 library for anchors, tags, and production migrations.

Common questions

Why did true become a JSON Boolean?

Unquoted true and false are parsed as Boolean values. Put the value in quotes when the intended data is the literal text true or false.

Can comments survive conversion?

No. Standard JSON has no comment syntax, so YAML comments are not represented in the output data model.

References and verification

The example and behavioral notes were checked against the browser implementation. Standards and primary references below define the relevant format, formula, or platform behavior.

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