JSON to YAML

Paste any valid JSON object or array and convert it to clean YAML format in one click. Useful for migrating configuration files, generating Kubernetes manifests, and working with tools that prefer YAML over JSON.

Last updated: May 28, 2026

JSON input

YAML output

Tip: JSON is validated before converting. Use the YAML to JSON tool in the related tools section for the reverse direction.

Client-Side Processing

Input Data Stays on Device

Instant Local Execution

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What is JSON to YAML?

JSON and YAML are both data serialisation formats, but YAML is often preferred for configuration files because it is more readable — no curly braces, no quotes on simple strings, and indentation instead of nesting symbols.

Converting JSON to YAML comes up regularly when moving between tools: a Node.js config file in JSON needs to become a Docker Compose file, a Postman environment export becomes an Ansible vars file, or an API response becomes a Kubernetes ConfigMap. This tool validates the JSON input first, then produces a clean two-space-indented YAML equivalent.

How to Use JSON to YAML

Paste valid JSON into the input panel

Click "Convert to YAML" — invalid JSON shows an error with the parse message

Copy the YAML output for use in your config file, manifest, or pipeline

Common Use Cases

DevOps engineers converting JSON-format configuration into YAML for Kubernetes, Helm, or Ansible workflows.
Backend developers migrating package.json or tsconfig.json settings into YAML-based CI/CD pipeline configs.
API developers transforming JSON API responses into YAML for use in OpenAPI / Swagger documentation.
Frontend developers converting a JSON theme or settings file into YAML for a static site generator.
Data engineers converting JSON export data into YAML format for ingestion by YAML-first tools.

Example Input and Output

Converting a JSON application config into YAML for use in a Docker Compose environment section.

JSON input

{"app":{"name":"api-service","port":8080,"debug":false},"database":{"host":"localhost","port":5432}}

YAML output

app:
  name: api-service
  port: 8080
  debug: false
database:
  host: localhost
  port: 5432

YAML indentation

This converter uses two-space indentation, which is the most common convention in YAML files for Kubernetes, Docker Compose, and GitHub Actions.

Browser-side only

All conversion runs locally in your browser. Your JSON data is never transmitted.

Frequently Asked Questions

Is JSON valid YAML?

Yes — valid JSON is technically valid YAML 1.2. However, JSON-to-YAML conversion produces the idiomatic YAML style (no braces, no quotes on simple keys) rather than JSON wrapped in a .yaml file.

Does this handle nested objects and arrays?

Yes. Nested objects become indented YAML mappings, and arrays become YAML sequences with dash (- ) prefixes.

What happens to JSON strings with special characters?

Strings containing colons, hashes, newlines, or quote characters are automatically wrapped in double quotes in the YAML output to preserve their values correctly.

Can I convert back from YAML to JSON?

Yes — use the YAML to JSON tool linked in the related tools section.

Is my JSON data sent to a server?

No. All conversion runs in your browser.