YAML to JSON Converter

How to Use

1. To convert YAML → JSON: paste your YAML into the left panel and click YAML → JSON.
2. To convert JSON → YAML: paste your JSON into the right panel and click JSON → YAML.
3. Use Ctrl+Enter (or Cmd+Enter on Mac) as a keyboard shortcut to convert from whichever panel you’re typing in.
4. Click Copy on either panel to copy the result to your clipboard.

Worked Examples

Simple object

Input YAML:

name: Alice
age: 30
active: true

Output JSON contains name, age, and active fields.

Nested structure with arrays

Input YAML:

server:
  host: localhost
  port: 8080
  features:
    - auth
    - logging
    - cache

Output JSON contains nested server object with features array.

Round-trip conversion

Paste the JSON output back into the right panel and click JSON → YAML to round-trip your data. Note that YAML comments and formatting preferences are not preserved in round-trips.

YAML vs JSON

YAML (YAML Ain’t Markup Language) is a human-friendly data serialization format popular for configuration files (Docker Compose, Kubernetes, Ansible, GitHub Actions). JSON (JavaScript Object Notation) is the most widely used data interchange format for APIs and web services. Both can represent the same data structures — this tool converts between them losslessly (except for YAML-only features like comments and anchors).