YAML to JSON

Convert YAML data formats into clean JSON documents.

100% Client-Side Local Execution

Upload Data

1
2
3

server:
  host: localhost
  port: 8080

server:
  host: localhost
  port: 8080

{
  "server": {
    "host": "localhost",
    "port": 8080
  }
}

{
  "server": {
    "host": "localhost",
    "port": 8080
  }
}

What is YAML to JSON?

This yaml to json converter parses YAML config files, like those used in Docker Compose, Kubernetes manifests, or CI/CD pipelines, and outputs the equivalent JSON structure. It acts as a yaml parser online for anyone who needs to inspect, validate, or feed YAML config into a JSON-only tool or API. Paste your YAML and get valid JSON immediately.

Technical Execution

The tool parses the YAML document according to the YAML spec, resolving indentation-based nesting, block sequences, and scalar types (strings, numbers, booleans, null) into their native data structure, then serializes that structure as standard JSON with braces and brackets.

Zero Data Storage Guarantee

YAML config files frequently define environment variables, service names, and deployment parameters specific to your infrastructure. This parser runs entirely client-side in your browser, so configuration details are never uploaded to a server.

How to Use YAML to JSON (Step-by-Step Guide)

Paste your YAML content into the input panel
The tool parses the indentation structure and converts it to JSON
Check that lists, nested maps, and scalar types converted correctly
Toggle pretty-print vs minified output if available
Copy the JSON result or download it as a .json file

Frequently Asked Questions (FAQ)

Q: Can I use this as a yaml parser online to validate my config?

A: Yes, if the YAML parses successfully into JSON, that confirms it's syntactically valid; a parsing error will point out the structural issue.

Q: How do I convert yaml to json online for a Kubernetes manifest?

A: Paste the manifest's YAML directly into the input, and the tool produces the equivalent JSON object, which Kubernetes and most tooling also accept as valid config.

Q: Does it handle YAML anchors and aliases?

A: Basic anchor (&) and alias (*) references are commonly supported and resolved into their expanded values in the JSON output; highly complex anchor chains may need review.

Q: Is this yaml to json converter free?

A: Yes, free with no account or limits.

Q: What happens to YAML comments during conversion?

A: Comments are discarded, since JSON has no comment syntax to preserve them in.

Q: How are multi-document YAML files (separated by ---) handled?

A: Multi-document files are typically parsed into an array of JSON objects, one per document section.

Q: Does indentation with tabs cause errors?

A: YAML disallows tabs for indentation, so a parsing error is expected if your file mixes tabs into the indentation structure — convert them to spaces first.

Q: How is this different from yaml-to-xml?

A: This outputs JSON's brace-and-bracket structure, while yaml-to-xml outputs tag-based XML markup, though both represent the same underlying data from your YAML.

Report an issue with this tool