This tool is part of these guided projects. Each project provides step-by-step instructions with checklists and all the tools you need in one place.
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Format and beautify YAML with consistent indentation online. Validate structure, fix spacing, and pretty-print configs for CI, Docker, and Kubernetes.
Convert YAML to JSON. Parse YAML config. For config conversion. Free developer utility that runs locally in your browser — fast, private, and no server upload.
Format, beautify, and validate JSON online. Pretty-print with 2- or 4-space indentation, fix syntax errors, and inspect nested structures instantly.
JSON maps directly to YAML since YAML is a JSON superset. Objects become mappings, arrays become sequences, and primitives map directly. The conversion adds readability through indentation and removes braces/brackets.
JSON {} → YAML mapping; JSON [] → YAML sequence (- prefix); JSON "key": "value" → YAML key: valueAll JSON types have YAML equivalents. Strings may lose quotes in YAML unless they contain special characters. Numbers and booleans convert without modification. Null converts to ~ or null keyword.
Updated: July 2026
Transform a JSON package configuration into YAML format for tools that prefer YAML (e.g., GitHub Actions, Docker Compose).
→ Clean YAML with 2-space indent, no braces
Convert a JSON API response sample to YAML for inclusion in OpenAPI spec examples.
→ YAML block sequence with proper indentation
YAML spec does not guarantee key order in mappings (though most parsers preserve it). If order matters, use a YAML library that preserves insertion order.
Long JSON strings should be converted to YAML block scalars (| for literal, > for folded) rather than quoted inline strings, which improves readability.
Convert JSON to YAML for configuration files and manifests. Transform API payloads and settings into readable YAML with proper nesting and quoting. It applies the json to yaml conversion (JSON {} → YAML mapping; JSON [] → YAML sequence (- prefix); JSON "key": "value" → YAML key: value). For example: convert package.json to yaml config — Transform a JSON package configuration into YAML format for tools that prefer YAML (e.g., GitHub Actions, Docker Compose).