JSON to YAML Converter

The JSON to YAML Converter turns JSON — API responses, package configs, exported settings — into clean, indentation-based YAML suitable for Kubernetes manifests, Docker Compose files, CI/CD pipelines, and other config-driven tools. The converter automatically quotes ambiguous scalars and produces readable block-style output at the indentation width you choose.

• •Block-style YAML output by default: nested objects and arrays render as indented YAML, not inline flow syntax
• •Automatic scalar quoting: strings that look like booleans ('yes', 'no', 'on', 'off'), numbers, or dates are quoted so they round-trip as strings, not YAML keywords
• •Configurable indentation: 2-space or 4-space output to match your team's YAML style
• •Real-time format detection: recognizes JSON vs. YAML as you type and suggests the matching direction
• •Nested object and array support: JSON structures of any depth convert to properly indented YAML
• •Runs entirely in your browser: your JSON data is never uploaded to a server

• •Turning a JSON API response into a Kubernetes manifest or Helm values file
• •Converting an exported JSON config into a Docker Compose file for local development
• •Writing a GitHub Actions or GitLab CI pipeline starting from a JSON definition generated by a script
• •Migrating an application config.json into config.yaml for tools that expect YAML
• •Producing human-editable YAML from a JSON payload for documentation or code review

1. 1.Paste an object or array of JSON into the input editor, or upload a .json file
2. 2.Let auto-detect confirm the direction, or select 'JSON to YAML' manually
3. 3.Choose 2-space or 4-space indentation to match your target file's style
4. 4.Click Convert to run the conversion
5. 5.Copy the YAML output or download it as a .yaml file

• •JSON strings that look like numbers (e.g. "00123") or booleans (e.g. "true") are quoted in the YAML output to preserve their original string type — this is expected, not a bug
• •Empty objects ({}) and empty arrays ([]) render as inline flow notation ('{}' / '[]') since block style has no representation for an empty container
• •Non-ASCII characters and emoji are preserved as-is but may be quoted depending on surrounding punctuation
• •Very deeply nested JSON produces YAML with correspondingly deep indentation, which can become hard to read past 5-6 levels

• •The output never reconstructs YAML anchors and aliases, even if the same object appears multiple times in the source JSON, since JSON has no reference semantics to detect that from
• •JSON text has no way to express circular references, functions, undefined, or symbols in the first place — pasting anything that isn't valid JSON syntax (including these) makes JSON.parse throw a syntax error before the YAML conversion step ever runs
• •Comments cannot be added during conversion — YAML comments are a manual, post-conversion step

If you're starting from a YAML file — a Kubernetes manifest, Docker Compose file, or CI pipeline definition — and need JSON for an API, JSON Schema validator, or JavaScript code, use the YAML to JSON Converter instead. It resolves anchors and aliases automatically and detects both block and flow style YAML.