Why does this tool preserve key order when other converters don't?

Most online JSON-to-YAML converters sort object keys alphabetically before emitting YAML, which reorders your configuration. This tool uses js-yaml with sortKeys: false (the library default), so the YAML output always follows the same key sequence as your original JSON input. Enable "Sort keys alphabetically" in the options if you need sorted output.

What are YAML anchors and when are they emitted?

YAML anchors (&name) allow one object to reference another, reducing duplication. When the same object appears multiple times in the JSON input, this tool detects it and automatically emits an anchor on the first occurrence and an alias (*name) on later ones. You can disable this with the "Detect & emit YAML anchors" checkbox.

Does my JSON leave my device?

No. All conversion happens entirely inside your browser using the js-yaml library. Your JSON is never uploaded to any server, never stored, and never logged. The tool works fully offline once the page has loaded.

Can I convert YAML back to JSON with this tool?

Yes. Click the "YAML → JSON" tab to switch direction. The tool parses the YAML and emits pretty-printed JSON, also preserving key order from the YAML source.

Does it work on mobile?

Yes. The tool works in any modern browser — Safari on iPhone and iPad, Chrome on Android, Edge on Windows. Paste your JSON into the text area and tap Convert.

What JSON features are supported?

Any valid JSON is supported: nested objects, arrays, strings, numbers, booleans, and null values. JSON5 (trailing commas, unquoted keys, comments) is not supported — use standard JSON only.

JSON to YAML — Preserve Key Order

Convert JSON to YAML in your browser while preserving insertion key order. Unlike most tools, keys are never sorted alphabetically — no upload, no signup.

100% client-side · no upload. JSON is parsed and converted inside your browser. Nothing is sent to a server.

Sort keys alphabetically Detect & emit YAML anchors

JSON input

Download

Paste JSON above and click Convert.

YAML output

How to use

Paste a valid JSON object or array into the input box above.
Click JSON → YAML — keys appear in insertion order, not sorted alphabetically.
Click Copy to copy the YAML, or Download to save a .yaml file.

Related data tools

Common use cases

常见问题

Why does this tool preserve key order when other converters don't?: Most online JSON-to-YAML converters sort object keys alphabetically before emitting YAML, which reorders your configuration. This tool uses js-yaml with sortKeys: false (the library default), so the YAML output always follows the same key sequence as your original JSON input. Enable "Sort keys alphabetically" in the options if you need sorted output.
What are YAML anchors and when are they emitted?: YAML anchors (&name) allow one object to reference another, reducing duplication. When the same object appears multiple times in the JSON input, this tool detects it and automatically emits an anchor on the first occurrence and an alias (*name) on later ones. You can disable this with the "Detect & emit YAML anchors" checkbox.
Does my JSON leave my device?: No. All conversion happens entirely inside your browser using the js-yaml library. Your JSON is never uploaded to any server, never stored, and never logged. The tool works fully offline once the page has loaded.
Can I convert YAML back to JSON with this tool?: Yes. Click the "YAML → JSON" tab to switch direction. The tool parses the YAML and emits pretty-printed JSON, also preserving key order from the YAML source.
Does it work on mobile?: Yes. The tool works in any modern browser — Safari on iPhone and iPad, Chrome on Android, Edge on Windows. Paste your JSON into the text area and tap Convert.
What JSON features are supported?: Any valid JSON is supported: nested objects, arrays, strings, numbers, booleans, and null values. JSON5 (trailing commas, unquoted keys, comments) is not supported — use standard JSON only.

Last updated: 2026-05-20 By jarvisbox

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