JSON to YAML Converter

JSON and YAML, both directions

YAML is the configuration language of Kubernetes manifests, Docker Compose files, GitHub Actions, Ansible playbooks and OpenAPI specs. It represents the same data as JSON — objects, lists, strings, numbers, booleans and null — but uses indentation instead of braces, which makes it easier for people to read and edit. In fact every JSON document is also valid YAML 1.2.

In JSON → YAML mode the tool produces block-style YAML, quoting strings only when necessary (for example "yes", "1.0" or text containing :) so values keep their type. In YAML → JSON mode it reads full YAML: comments, multi-line strings (| and >), anchors and aliases, and flow collections. Switching the mode reuses the last result as the new input, so you can round-trip a file.

How to convert

1. Choose the direction in Mode.
2. Paste JSON or YAML (or upload a .json, .yaml or .yml file).
3. Pick 2 or 4 spaces of indentation and copy or download the result.

Example

{
  "server": {"port": 8080, "tls": true},
  "features": ["auth", "billing"]
}

server:
  port: 8080
  tls: true
features:
  - auth
  - billing

Things to know

• YAML comments are dropped when converting to JSON because JSON has no comments.
• In YAML, unquoted yes/no are strings in YAML 1.2 (the version used here) but booleans in older YAML 1.1 tools — quote them if unsure.
• Indentation must use spaces; tabs are not allowed in YAML.