PrettyJSON Logo
PrettyJSON

Instantly clean, validate, and inspect web payloads

☕Buy me a coffee
JSON Input
YAML Output

Waiting for JSON input

Paste JSON on the left or load the sample to see YAML instantly.

100% Client-Side & Private

Convert JSON to YAML Online

Convert JSON into clean, readable YAML for Kubernetes manifests, GitHub Actions, Docker Compose, Helm values, and app config. PrettyJSON emits standard YAML with 2-space indentation and keeps long strings — image tags, URLs, tokens — on a single line instead of wrapping them. Because JSON is a strict subset of YAML the conversion is lossless, and it runs entirely client-side.

Original key order kept

Keys stay in their source order instead of being alphabetized, so the YAML diffs cleanly against the JSON it came from.

Native, unquoted scalars

true, 42, and null emit as plain YAML scalars; only strings that would otherwise be ambiguous get quoted.

Lossless by design

JSON is a strict subset of YAML, so every value round-trips intact — convert back with YAML to JSON whenever you need.

How to convert JSON to YAML

A quick walkthrough and the details that matter.

Steps

  1. Paste valid JSON, or upload a .json file.
  2. The equivalent YAML is generated instantly with 2-space indentation.
  3. Copy the YAML or download it as a .yaml file for your manifest or pipeline.

Why convert JSON to YAML?

Programs and APIs emit JSON, but the configuration ecosystem — Kubernetes, Ansible, CI pipelines — prefers YAML because it is easier for humans to read and diff and it supports comments. Converting lets you take a generated JSON config or an API response and drop it straight into a manifest without retyping it by hand.

What is preserved and what changes

Keys, nesting, arrays, numbers, booleans, and null all map one to one, and the original key order from your JSON is kept rather than alphabetized, so the structure stays recognizable. Formatting is normalized to 2-space indentation. Because JSON has no comments, the YAML output will not contain any — you can add them afterward.

Example: JSON in, YAML out

A before-and-after using sample JSON.

JSON input 
{ "service": "api", "replicas": 3, "ports": [80, 443], "env": { "TIER": "prod" } }
YAML output 
service: api
replicas: 3
ports:
  - 80
  - 443
env:
  TIER: prod

Frequently Asked Questions

Common questions about converting JSON to YAML.

Is the YAML valid for Kubernetes and CI configs?

Yes. The output is standard YAML produced by js-yaml with 2-space indentation, suitable for Kubernetes manifests, GitHub Actions, Docker Compose, and Ansible playbooks.

Does converting JSON to YAML lose any data?

No. JSON is a subset of YAML, so every value maps cleanly. Keys, nesting, arrays, numbers, booleans, and null are all preserved.

Will it keep my key order?

Yes. Keys are emitted in the same order they appear in the source JSON rather than being sorted alphabetically, so the converted manifest stays easy to compare against the original.

Are my config values uploaded anywhere?

No. Conversion is local to your browser — useful when your JSON contains secrets, API tokens, or internal hostnames you would not want to paste into a remote service.