YAML to JSON
ConverterConvert YAML data to formatted JSON with full nested structure support. Drop in config files for clean indented JSON you can paste anywhere.
About YAML to JSON
YAML is the dominant config format in DevOps and cloud-native tooling, but programs, APIs, and most languages prefer JSON. This tool parses YAML and converts it to standard JSON locally in your browser, supporting anchors (&), references (*), multi-document (---), and block scalars. Parse errors report the exact line, and nothing is uploaded. Tip: Bookmark this tool for quick access whenever you need format conversion. All processing happens locally in your browser — no data upload, so feel free to paste sensitive content.
How to Use
- Open the YAML to JSON tool page
- Enter or paste your data into the input area
- View the real-time results and use the copy button to get the output
Use Cases
- Store configs — Convert YAML to JSON before writing to a database or posting via API, avoiding an extra YAML parser on the backend.
- Debug K8s manifests — Convert kubectl-exported YAML to JSON, then extract fields with jq or JSONPath.
- Consume configs in frontend — Browsers natively support JSON.parse, so convert YAML to JSON for direct frontend use.
- Expand anchors — Expand anchor-reused YAML into full JSON to see the actual effective values.
- Validate format — A failed conversion means invalid YAML syntax — use it as a quick lint check.
- Preprocess Ansible vars — Convert Ansible inventory YAML to JSON so external scripts can consume host variables without a YAML library.
- Seed test fixtures — Write test data in concise YAML syntax, then convert to JSON for use in unit-test fixtures.
FAQ
Does it support multi-document YAML?
Yes. YAML documents separated by --- become a JSON array, with each document as one element.
What happens to YAML anchors and references?
They are fully expanded. &anchor definitions and *ref references are inlined into actual repeated content, since JSON has no reference mechanism.
Are dates and booleans auto-detected?
Yes. YAML true/false, null, numbers, and dates are typed accordingly; quote them in YAML to keep them as strings.
Why does it report an indentation error?
YAML is very indentation-sensitive: siblings must align and tabs are forbidden. The error gives a line number to check.
Can I convert back to YAML?
Yes, use our JSON to YAML tool for the reverse direction.
Any browser compatibility requirements?
This tool works in all modern browsers (Chrome, Firefox, Edge, Safari). No plugins or extensions required.
Can I use it offline?
After initial load, most features work offline. The core logic runs entirely in your browser with no network dependency.
Comments
Comments are stored locally in your browser. Configure Giscus for cloud-based comments.