JSON to YAML Converter

Runs entirely in your browser

Convert JSON to YAML directly in your browser. Paste your JSON, convert, and copy the result.

Advertisement

— Status
0 Output characters
Advertisement

What is JSON to YAML?

JSON to YAML converts a JSON document into its YAML equivalent. YAML is commonly used for configuration files (Docker Compose, Kubernetes, CI pipelines) because it's more compact and readable than JSON for humans editing it by hand.

How to use JSON to YAML

  1. Paste your JSON into the Input box.
  2. Click Convert to YAML.
  3. Copy the YAML result from the Output box.

Features

  • Converts objects, arrays, strings, numbers, booleans and null.
  • Quotes strings only when needed, keeping the output clean.
  • Clear error messages with line and column details for invalid JSON.
  • 100% client-side — your data never leaves your browser.

Tips

  • Strings are quoted only when they'd otherwise be ambiguous — a value like "true", "123" or "" is written as "true", "123" or "" in the output, so a YAML parser reads it back as a string rather than a boolean, number or missing value.
  • Nested arrays and objects inside an array item are indented two extra spaces under the - marker, matching the style used by tools like Docker Compose and GitHub Actions.
  • An empty JSON object converts to {} and an empty JSON array converts to [] — YAML's compact "flow" syntax — rather than being written out as an empty block.

Is JSON to YAML Converter safe?

Yes. JSON to YAML Converter parses your JSON and makes its string-quoting decisions entirely with local JavaScript in your browser, so nothing you paste is ever uploaded to a server.

Example

Input:

{"name": "Toolbeel", "active": true, "tags": ["free", "fast"]}

Output:

name: Toolbeel
active: true
tags:
  - free
  - fast

Frequently Asked Questions

Does this support nested objects and arrays?

Yes. Nested objects, arrays, strings, numbers, booleans and null are all converted to their YAML equivalents.

Will the YAML output be valid?

Yes, for any valid JSON input. Strings are quoted only when needed (e.g. they contain special characters or look like another type) so the output stays clean and readable.

What happens if my JSON is invalid?

You'll see an error message with the line and column where the problem was found, so you can fix it before converting.

Related tools