🔄 Multi-Format Converter

Convert JSON to YAML, XML,
TOML & CSV — Free

One tool to convert between all common data formats. Offline Windows desktop app. Paste JSON, pick your output format, done.

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JSON Conversion Examples

Select your source and target format in JSONLab — the conversion happens instantly. Here's the same data structure shown in JSON and YAML:

JSON input
{
  "server": {
    "host": "localhost",
    "port": 8080,
    "debug": true,
    "tags": ["api", "v2"]
  }
}
YAML output
server:
  host: localhost
  port: 8080
  debug: true
  tags:
    - api
    - v2

Supported Format Conversions

YAML

JSON ↔ YAML

Perfect for Kubernetes configs, Docker Compose, GitHub Actions, and Ansible playbooks.

XML

JSON → XML

Convert JSON APIs to XML for legacy system integration, SOAP services, and enterprise tools.

TOML

JSON → TOML

Generate TOML for Rust Cargo configs, Hugo sites, Python pyproject.toml, and more.

CSV

JSON → CSV

Flatten JSON arrays into CSV for spreadsheet import, data analysis, and reporting.

JSON

Any → JSON

Convert YAML, XML or TOML back to clean, formatted JSON. Bi-directional support.

How to Convert JSON in JSONLab

1

Open JSONLab and create a new entry

Click the + New tab button to open a fresh input panel.

2

Paste your JSON (or import a file)

Type or paste JSON into the editor. The source format is auto-detected as JSON.

3

Select the output format chip

In the output toolbar, click YAML, XML, TOML, or CSV — the converted output appears instantly.

4

Copy or export

Hit the Copy button or Export to save the result as a .yaml, .xml, .toml, or .csv file.

Why Convert JSON Offline?

Frequently Asked Questions

Yes. JSONLab supports bi-directional conversion. Set the source format selector to YAML, paste your YAML content, and select JSON as the output. The same applies to XML and TOML inputs.
JSON to CSV works best with arrays of flat objects (the most common API response format). Deeply nested objects are flattened using dot notation (e.g. "user.address.city") so every field still appears as a CSV column.
JSONLab outputs YAML 1.2-compatible markup, which is the most widely supported version and avoids known ambiguities in YAML 1.1 (such as the "Norway Problem" with boolean parsing).
JSONLab supports multi-tab workflows — you can have several files open at once and convert each independently. Bulk batch conversion is not currently available, but multi-tab makes it fast to process files one by one.
Yes. JSONLab is freeware and may be used freely in both personal and commercial/professional environments. There are no licensing fees, subscriptions, or usage restrictions.

More Tools in JSONLab

✨ JSON Formatter 🔍 JSON Validator 🔑 JWT Decoder 🏠 JSONLab Home

Convert JSON Free on Windows

YAML, XML, TOML, CSV — all formats, one app. Download JSONLab free from the Microsoft Store.

Get it from Microsoft