utiloralab.
Developer tools / Free online tool

YAML to JSON

Convert YAML into formatted JSON with safe alias limits and duplicate-key checks.

Runs in your browser
0 characters
OUTPUT
Your result will appear here

A little input. A useful output.

Ctrl + Enter to run

Your input stays on your device. No uploads. No account. Just your result.

How to use YAML to JSON

  1. 01

    Paste one YAML document.

  2. 02

    Convert to JSON.

  3. 03

    Review the output before using it.

A quick example

Try a simple example

INPUT
name: Ada
active: true
OUTPUT
{
  "name": "Ada",
  "active": true
}

About YAML to JSON

This tool parses one YAML document and serializes its data to JSON. Duplicate keys are rejected and alias expansion is bounded to avoid resource exhaustion.

When it comes in handy

  • Move YAML configuration into JSON.
  • Inspect a YAML data structure.

Why use it here?

  • Runs locally in your browser.
  • No account needed; copy or download your result.

A few things to keep in mind

  • Comments are not part of JSON output.
  • Excessive aliases and duplicate keys are rejected.

Good questions. Simple answers.

Can I convert multiple YAML documents?

Convert one document at a time. Split a stream at its document separators first.

Is my input uploaded?

No. This tool processes your input in your browser. Your input and output are not included in analytics.

A good next step

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