YAML to JSON Converter
Convert YAML to JSON online with real-time conversion and configurable pretty printing. No external dependencies required.
What is YAML?
YAML ("YAML Ain't Markup Language") is a human-readable data serialization format that uses indentation instead of brackets to define structure. It first appeared in 2001 as an alternative to XML and has become the dominant config format for DevOps tooling: Kubernetes manifests, GitHub Actions workflows, Docker Compose files, Ansible playbooks, OpenAPI specs, and most CI configurations. Compared to JSON, YAML supports comments (
#), multi-line strings, anchors and aliases for DRY config, and a richer type system. Programmatic consumers (APIs, JavaScript runtimes, browsers) usually want JSON instead, so converting YAML → JSON is a common build-time and tooling step. Since YAML 1.2 is technically a superset of JSON, the conversion is loss-free except for comments. Need the reverse direction? Use the JSON to YAML tool. Pretty-print the resulting JSON with the JSON Formatter.YAML Input
JSON Output
Indent:
2 spaces
How to use this tool
- 1Paste your YAMLDrop YAML into the input pane. The converter parses as you type and surfaces errors with line numbers for invalid syntax.
- 2Pick JSON indentationChoose 2-space (most common) or 4-space indentation. The output updates in real time.
- 3Copy the JSON outputHit Copy to grab the converted JSON, or download as a .json file for your repo or API contract.