Private JSON to YAML conversion in your browser

JSON to YAML Converter

Convert JSON to YAML instantly. Paste JSON or upload a file, choose your indentation, and download clean YAML — all locally in your browser.

JSON TO YAMLPaste JSON or upload a .json file, then convert to clean YAML.

No upload required

JSON Input

YAML Output

Your YAML output will appear here.

Indentation 2 spaces 4 spaces

Files stay in your browser No sign-up Free to use

Convert JSON to YAML Online

Use this free JSON to YAML converter to turn JSON objects, arrays, and configuration data into readable YAML. Paste JSON or upload a .json file, choose your indentation, and copy or download the YAML result. The conversion runs locally in your browser, so your data is never uploaded to a server.

Need the reverse conversion? Try YAML to JSON

Need cleaner JSON first? Try JSON Formatter

How to Convert JSON to YAML

Paste or upload JSON

Paste JSON data into the input panel, or choose a local .json file. Your input stays on this device.

Convert JSON to YAML

Pick 2 or 4 space indentation, then click Convert JSON to YAML. Nested objects, arrays, and basic value types keep their structure.

Copy or download YAML

Copy the YAML result, or download a .yaml (or .yml) file for configs, samples, and everyday data work.

JSON to YAML Example

Object properties become YAML key-value pairs, arrays become lists, and numbers and booleans stay as their matching types in the output.

JSON INPUT

{
  "app": "demo",
  "port": 8080,
  "enabled": true,
  "regions": [
    "us",
    "eu"
  ]
}

YAML OUTPUT

app: demo
port: 8080
enabled: true
regions:
  - us
  - eu

Convert JSON Files to YAML

Upload a .json file from your computer when pasting is inconvenient. The file is read locally in your browser — nothing is sent to a server for conversion. After a successful run, copy the YAML or download output.yaml.

Input is limited to about 10 MB so the page stays responsive. Split or trim larger files before converting. If the JSON is invalid, the tool shows an error with line and column when it can find the problem, and clears any previous output so you do not copy or download an old result.

JSON Arrays, Nested Objects and Data Types

Nested structure and common types are kept. Some plain strings (for example dates or words like true) may be read differently by other YAML tools — quote them in the output if you need an exact string.

JSON input	YAML handling
`{ "name": "Ada" }`	Key-value mapping
`[1, 2, 3]`	YAML list
`true` / `false`	Boolean values
`null`	Null / empty value
`"00123"`	Kept as a string
Nested objects	Nested indentation preserved

JSON vs YAML

Quick differences between the two formats. Need YAML back as JSON? Use YAML to JSON.

JSON	YAML
Uses braces and brackets	Often uses indentation and list markers
No standard comments	Supports comments
Common for API data exchange	Common for configuration files
Strings and keys usually quoted	Plain strings can omit quotes

Why use this JSON to YAML converter?

Free online JSON to YAML converter
Paste JSON or upload a .json file
2 or 4 space indentation
Copy YAML and download .yaml / .yml
Clear errors with line and column when possible
Runs privately in your browser

Frequently asked questions

How do I convert JSON to YAML online?

Paste JSON into the input panel or upload a .json file, choose 2 or 4 space indentation, then click Convert JSON to YAML. Copy the result or download a .yaml file. Need YAML back as JSON? Open YAML to JSON.

Can I convert a JSON file to YAML?

Yes. Upload a local .json file or paste its contents. The file is read in your browser — it is not uploaded to a server — then you can copy or download the YAML output.

Does this JSON to YAML converter support arrays?

Yes. JSON arrays become YAML lists. Nested objects stay nested, and mixed structures such as lists of objects convert with the same hierarchy.

Will numbers, booleans, and null values be preserved?

Within normal JSON types, yes: numbers stay numbers, true and false stay booleans, and null stays null. String values such as "00123" or "true" stay strings. Very large whole numbers may lose accuracy in the browser, so the converter asks you to turn big IDs into strings first.

Can I download the output as .yaml or .yml?

Yes. After a successful conversion, choose .yaml or .yml in the download control, then download the file.

Is my JSON uploaded to a server?

No. Parsing and conversion run locally in your browser. Your JSON and YAML never leave this device for conversion. To tidy messy JSON first, try JSON Formatter.