Convert YAML to JSON Online
Converting YAML configuration files to JSON is a common task when working with APIs that expect JSON, writing test fixtures, or importing YAML-based configs into tools that require JSON format. Kubernetes manifests, Helm values files, and CI/CD pipeline configurations are all written in YAML, but many programmatic tools and validators expect JSON. This converter parses valid YAML and outputs properly formatted JSON with correct indentation. It handles nested mappings, sequences, multi-line strings, and YAML anchors. The output is validated JSON that you can paste directly into an API call, a configuration field, or use with tools like jq. Everything processes in your browser — no file uploads, no data transmission. The converter also shows clear error messages for invalid YAML so you can quickly identify and fix syntax problems.
FAQ
- Does this handle YAML anchors and aliases?
- Yes. YAML anchors (&name) and aliases (*name) are resolved before conversion, so the resulting JSON contains the fully expanded data.
- Can I convert multi-document YAML?
- Multi-document YAML files separated by --- are converted and the first document is output. For multiple documents, convert each section separately.
- What happens to YAML comments?
- YAML comments (lines starting with #) are not part of the data model, so they are not included in the JSON output. Only the actual data values are converted.