Tool Fu
$ toolfu run yaml-to-json

YAML to JSON Converter — Online Free

Convert YAML to JSON online for free. Paste YAML configuration and get formatted JSON output instantly. Supports anchors, aliases, nested structures — runs in your browser.

all processing runs in your browser
yaml-to-json
input > paste YAML
output > JSON

Convert YAML to JSON Online — Free YAML to JSON Converter

YAML is the go-to format for configuration files in tools like Docker Compose, Kubernetes, GitHub Actions, and many more. But sometimes you need your config as JSON — for APIs, for programmatic access, or for tools that only accept JSON input.

Paste your YAML and get clean, formatted JSON output instantly. The tool handles nested structures, arrays, anchors, and all standard YAML features. The conversion happens in your browser using the js-yaml library — nothing is sent to a server.

Common use cases

  • Converting Kubernetes manifests to JSON for API calls
  • Transforming CI/CD pipeline configs for debugging
  • Migrating configuration between YAML and JSON formats
  • Validating YAML syntax by checking the JSON output
$ cat FAQ.md
What is YAML?▶
YAML (YAML Ain't Markup Language) is a human-readable data serialization format commonly used for configuration files. It uses indentation to represent structure instead of brackets or braces, making it easier to read and write than JSON for configuration purposes.
Can this tool handle multi-document YAML?▶
This tool parses single YAML documents. If your input contains multiple documents separated by '---', only the first document will be converted. Split your documents and convert them individually.
Is my data sent to a server?▶
No. All YAML parsing and JSON conversion happens entirely in your browser using the js-yaml library. Your data never leaves your device.
Are YAML anchors and aliases supported?▶
Yes. The parser supports YAML anchors (&) and aliases (*) and will resolve them into the final JSON output.