JSON to YAML Converter transforms any JSON document into equivalent, valid YAML. Paste JSON — an API payload, a package manifest, a config export — and get back clean YAML with consistent indentation, correct list syntax, and properly quoted strings, ready to drop into a Kubernetes manifest, Docker Compose file, GitHub Actions workflow, or any other YAML-based configuration.
The conversion is not just a syntax swap. YAML has sharp edges JSON does not: an unquoted "no" becomes the boolean false in many parsers, "3000" silently turns into a number, and version strings like 1.10 get truncated to 1.1. This converter detects every ambiguous scalar — booleans, numbers, YAML 1.1 legacy values like yes/no/on/off, and strings with special characters — and quotes them so your data survives the round trip with types intact.
Everything happens 100% in your browser. Configuration files often contain hostnames, internal ports, and secrets, so nothing you paste is uploaded or stored — the converter works offline once loaded. Indentation is configurable (2 or 4 spaces) to match your team's style, and there is an option to quote every string for maximum safety.
Paste any valid JSON document into the input panel — objects, arrays, or nested structures of any depth — or click Load Sample to start from a realistic service config.
Choose 2-space or 4-space indentation to match your project conventions, and optionally enable "Quote all strings" if your YAML consumer is strict about types.
Click Convert. The JSON is validated first — syntax errors are reported with the parser's exact message so you can fix the offending character quickly.
Copy the generated YAML to your clipboard or download it as a .yaml file, then paste it into your manifest, workflow, or compose file.
Strings like "no", "3000", and "1.10" are automatically quoted so they stay strings instead of becoming booleans or numbers in YAML parsers
Output with 2-space or 4-space indentation to match Kubernetes, Ansible, or your team's lint rules
Nested objects, arrays of objects, empty arrays ([]) and empty objects ({}) all convert to their correct YAML forms
Invalid JSON is caught before conversion with the exact parse error, so you never get silently broken YAML
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