Transform

JSON to YAML Converter

Turn JSON into readable YAML for configs, Kubernetes manifests, and CI pipelines.

Preserves full nesting — no flattening needed
Consistent 2-space indentation, no line wrapping
Works on any JSON shape — object, array, or primitive

JSON to YAML Converter — JSON Prism

{
  "id": 1042,
  "name": "Dana",
  "roles": ["admin", "editor"],
  "active": true
}

JSON Prism·Browser-only · No uploads

Practical guide

Build, validate, and reuse JSON with less friction.

A focused walkthrough for deciding when the tool fits your workflow.

The JSON to YAML Converter turns any JSON value — object, array, or primitive — into clean, properly indented YAML. Because YAML natively supports the same nested structures JSON does, nothing needs to be flattened or serialized: objects become indented mappings, arrays become dash-prefixed lists, and the result stays valid at any nesting depth.

How to use the JSON to YAML Converter

Paste your JSON into the input panel.
Open the Convert panel; it opens directly on the YAML tab.
Copy the generated YAML, or download it as a .yaml file.
Edit the source JSON and the YAML output updates immediately.

What it handles

Deep nesting of objects and arrays, preserved exactly as indentation levels, with no depth limit
Any top-level shape — a JSON object, a JSON array, or even a single string, number, or boolean
Strings that need YAML-specific quoting (colons, leading dashes, reserved words like true or null) are quoted automatically so the output parses back correctly
Long values are never line-wrapped, so multi-line strings and long URLs stay on one line

JSON code example

This JSON:

JSON

{
  "service": "api",
  "replicas": 3,
  "ports": [8080, 8443],
  "env": { "NODE_ENV": "production" }
}

converts to:

YAML

service: api
replicas: 3
ports:
  - 8080
  - 8443
env:
  NODE_ENV: production

When to use it

Kubernetes manifests and Helm values. Draft a resource as JSON, then convert to the YAML Kubernetes expects.
CI/CD pipeline files. GitHub Actions, GitLab CI, and CircleCI configs are YAML — build the logic as JSON first if that's easier to script, then convert.
Docker Compose files. Convert a JSON service definition into docker-compose.yml format.
Config migration. Move a config that started as JSON (from an API or a generator) into a YAML-based tool without hand-editing the structure.

Questions about JSON to YAML Converter

Everything you need to know before you start.

Paste your JSON into the input panel, open the Convert panel, and select the YAML tab (or use this dedicated JSON to YAML tool, which opens directly into it). The converted YAML appears immediately and updates as you edit the JSON.

Yes, at any depth. Unlike CSV, YAML natively supports nesting, so objects become indented mappings and arrays become dash-prefixed lists — nothing gets flattened or serialized into a string.

No. Any valid JSON value converts — a top-level object, a top-level array, an array of primitives, or a single string or number. YAML has no structural requirement like CSV's array-of-objects rule.

Yes. YAML is a superset of JSON's data model, so converting JSON to YAML and back with any standard YAML parser reproduces the same objects, arrays, strings, numbers, booleans, and nulls.

That matches the convention used by most YAML tooling — Kubernetes manifests, GitHub Actions, and Docker Compose files — so the output can usually be pasted in as-is without reformatting.

Ready to use it?