100% local — your data never leaves your browser

YAML to JSON Converter — Free Online Tool

Convert YAML to clean, indented JSON instantly in your browser. Free, private and offline-friendly: your data never leaves your device.

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YAML input

JSON output

Why convert YAML to JSON?

APIs, JavaScript code and many tools expect JSON, while your configuration lives in YAML — Kubernetes manifests, Docker Compose, CI pipelines. Paste your YAML above and get clean, two-space indented JSON ready to use.

How it works

The converter parses your YAML locally — anchors, aliases and typed scalars included — and serializes the result as indented JSON. Invalid YAML is flagged immediately in the editor.

Frequently asked questions

Is my YAML data uploaded to a server?
No. The conversion runs entirely in your browser with JavaScript. Nothing is sent over the network, which makes the tool safe for sensitive data.
Are anchors and aliases supported?
Yes. YAML anchors (&) and aliases (*) are resolved during parsing, so the JSON output contains the fully expanded values.
What happens to comments?
JSON has no comment syntax, so YAML comments are dropped during the conversion — that is a limitation of the JSON format itself, not of the tool.