Can I use this tool to convert YAML to JSON as well?

Yes. This is a bidirectional converter. Click YAML to JSON to convert YAML input to formatted JSON. The tool validates the input in both directions and shows a descriptive error message if the syntax is incorrect.

JSON to YAML Converter Online Free

The fastest JSON to YAML converter online — paste any JSON and instantly get clean, formatted YAML output. Also converts YAML to JSON in one click, with correct handling of nested objects and Kubernetes-style lists. Our client-side JSON to YAML converter runs entirely in your browser. No signup, no upload, 100% private.
JSON to YAML · YAML to JSON · Validation · DevOps Config · Free · No Signup

Ready — paste JSON or YAML to begin

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Input JSON

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Output YAML

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How It Works

1. Paste JSON or YAML

Paste any JSON or YAML into the left panel. Supports nested objects, arrays and all value types.

2. Choose Direction

Click JSON → YAML or YAML → JSON. The input is validated before conversion.

3. Convert Locally

All conversion runs in your browser — your config data never leaves your device.

4. Copy or Download

Copy the output to clipboard or download as .yaml or .json.

What Is a JSON to YAML Converter?

A JSON to YAML converter transforms data from JSON (JavaScript Object Notation) format into YAML (YAML Ain't Markup Language) format — or vice versa. Both formats represent the same hierarchical data structures: objects, arrays, strings, numbers, booleans and null values. The difference is syntax: JSON uses curly braces and quotes, while YAML uses indentation and minimal punctuation.

Our online JSON to YAML converter free tool handles both directions: paste JSON to get YAML instantly, or paste YAML to get formatted JSON. All conversion is fully client-side — your configuration files, API payloads and secrets never leave your browser.

JSON vs YAML — Side by Side

JSON

{
  "name": "my-service",
  "replicas": 3,
  "enabled": true,
  "ports": [8080, 443],
  "env": {
    "NODE_ENV": "production"
  }
}

YAML (converted)

name: my-service
replicas: 3
enabled: true
ports:
  - 8080
  - 443
env:
  NODE_ENV: production

Nested objects and Kubernetes-style lists are handled correctly

Converting YAML back to JSON requires figuring out, from indentation alone, which lines belong inside which object — including the common pattern of a list of mappings, like a Kubernetes container's env: block where each entry has its own name: and value: on separate lines. This converter correctly nests those, and treats a colon inside a value (like image: nginx:latest) as part of the value rather than a second key.

How to Convert JSON to YAML for Config Files

Using this JSON to YAML formatter takes seconds. Here's a step-by-step guide:

Step 1 — Paste your JSON. Copy your JSON from an API response, a configuration tool output or a .json file and paste it into the left panel. The input is validated automatically.
Step 2 — Click JSON → YAML. The converter parses your JSON and generates clean, indented YAML output in the right panel. If your JSON contains a syntax error, the status bar shows a red indicator with the error message.
Step 3 — Copy or download. Click Copy to copy the YAML to your clipboard, or click Download to save it as a .yaml file ready for use in Kubernetes, Docker Compose, Ansible or any other YAML-based tool.

JSON to YAML for DevOps and Kubernetes

This JSON to YAML converter for DevOps is particularly useful when working with these platforms and tools:

KubernetesManifests & Helm

Docker ComposeServices config

GitHub ActionsWorkflows

AnsiblePlaybooks

OpenAPIAPI specs

AWS CloudFormationTemplates

GitLab CIPipelines

When a REST API returns JSON and you need a Kubernetes deployment manifest, simply convert JSON to YAML for Kubernetes using this tool — no additional software or command-line tools required.

Common Uses for a JSON to YAML Converter

Our JSON to YAML converter tool is used by developers, DevOps engineers and sysadmins for many workflows:

Kubernetes configuration: Convert JSON Kubernetes configs exported from kubectl get ... -o json to YAML format for version control and readability.
Docker Compose: Convert JSON service definitions into docker-compose.yaml compatible YAML structure.
API to config conversion: Many cloud APIs return configuration as JSON. Convert to YAML for storage in infrastructure-as-code repositories.
OpenAPI / Swagger specs: OpenAPI specs can be written in either JSON or YAML. This tool converts between them instantly.
Learning YAML: Compare how the same data is expressed in JSON vs YAML — a useful learning exercise for developers new to YAML syntax.
CI/CD pipelines: Convert JSON environment or build configs to YAML for use in GitHub Actions, GitLab CI or Bitbucket Pipelines.

Frequently Asked Questions

How do I convert JSON to YAML online?

Paste your JSON into the left panel and click JSON → YAML. The converted YAML appears in the right panel instantly. Click Copy to copy it to your clipboard or Download to save it as a .yaml file. All processing happens in your browser — no upload, no signup required.

What is the difference between JSON and YAML?

JSON uses curly braces {}, square brackets [], commas and quoted keys. YAML uses indentation (2 spaces) and dashes for list items, with no quotes needed for most values. YAML is generally more human-readable and is the standard format for Kubernetes, Docker Compose, GitHub Actions and most DevOps configuration files.

Does the converter handle nested YAML objects and Kubernetes-style lists correctly?

Yes. Nested mappings (like a metadata: or spec: block), lists of plain values, and lists of mappings (the pattern Kubernetes uses for containers, ports and environment variables) are all parsed into properly nested JSON — matching the structure you'd get from a real YAML parser, not flattened to the top level.

Can I convert YAML to JSON as well?

Yes. This is a bidirectional YAML to JSON converter. Paste your YAML into the left panel and click YAML → JSON. The output is formatted JSON with 2-space indentation. Use the Swap button to move the output back to the input panel for further conversion.

Why use JSON to YAML for Kubernetes or Docker?

Kubernetes manifests, Helm charts, Docker Compose files, GitHub Actions and Ansible playbooks all use YAML. If you export a Kubernetes config using kubectl get deployment -o json or receive JSON from a cloud API, this converter instantly produces YAML ready for version control or direct deployment.

Is this JSON to YAML converter safe for config files?

Completely safe. This is a client-side JSON to YAML converter — all conversion happens locally in your browser using JavaScript. Your JSON or YAML data — including API keys, Kubernetes secrets and database passwords — is never transmitted to any server, stored anywhere, or accessible to anyone else. It works offline once the page is loaded.

What happens if my JSON has a syntax error?

The status bar shows a red dot and displays the exact error message from the JSON parser — for example "Unexpected token } at position 42". The input panel border turns red to draw attention to the issue. Fix the error in your JSON and click convert again.