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JSON to YAML

Convert JSON files or pasted JSON text to YAML directly in the browser.

YAML settings

Input

Private by design: your file never leaves your device.

Output

Paste valid JSON to see the YAML preview.

Paste valid JSON to see the YAML preview.

Good to know

The JSON to YAML converter converts JSON into YAML directly in your browser, with three null representations (~, text "null", or empty), a selectable string style (automatic, single, or double quotes), and an option to sort object keys alphabetically for more stable comparisons.

Typical searches include JSON to YAML, YAML generator, and Kubernetes YAML. Indentation (2 or 4 spaces), line width, a document-start marker (---), and a trailing newline can each be controlled individually. YAML is readable but sensitive to indentation and data types; validate the output in the target system, especially for Kubernetes or OpenAPI manifests.

Typical use cases

Generate a Kubernetes manifest from a JSON configuration

Convert a JSON configuration to YAML and enable the document-start marker when the target system expects multiple YAML documents.

Generate stable YAML output for version comparisons

Enable key sorting so the same data is always output in the same order — useful for diffs in Git.

Tips for better results

Deliberately quote strings with special characters

Force double quotes when strings contain values like "yes", "no", or numbers that could otherwise be ambiguously interpreted as other YAML types.

Resolve duplicate keys before converting

If duplicate JSON keys are treated as an error, deliberately clean up the source instead of relying on the automatic last value.

How it works

Step by step

  1. 1

    Paste JSON or open a file

    Paste JSON or open a JSON or TXT file.

  2. 2

    Choose the style and formatting

    Choose the null representation, string style, indentation, and key sorting.

  3. 3

    Copy or download the YAML

    Copy the generated YAML or download it as a file.

Features

Three null representations

Choose ~, the text "null", or an empty representation for JSON null.

Key sorting for stable diffs

Sort object keys alphabetically so identical data is always output the same way.

Local processing

Your data never leaves your device; conversion runs entirely in the browser.

Frequently asked questions

How is JSON null represented in YAML?

Selectable between the tilde ~, the text "null", or an empty representation, depending on desired readability.

Is my data uploaded?

No. Conversion runs entirely locally in the browser.

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