YAML to JSON Converter
Convert YAML configuration data, lists, and mappings into formatted JSON text with customizable indentation and optional key sorting.
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Convert structured YAML configuration snippets, arrays, and mappings into formatted JSON text quickly and accurately. This online converter parses your YAML input and formats the output with customizable spacing and key ordering to match your API schemas, application settings, or pipeline specifications. Paste single mappings, nested sequences, or multi-document YAML streams separated by standard document markers. The tool interprets scalars, lists, and associative maps, then serializes them into valid JSON. When you provide multi-document streams with triple hyphens, the tool processes each section, filters empty documents, and presents the output as an array when multiple documents exist. Adjust the indentation spacing to produce clean, readable JSON or compact representations suitable for storage and transport. Enable key sorting to alphabetize mapping keys across all nested levels for easier comparison between configuration files. If your input contains malformed syntax, the converter alerts you so you can fix formatting discrepancies immediately.
Instructions
- Paste or type your YAML data into the YAML Input text area.
- Set the desired number of indentation spaces in the Indent field, with 2 spaces used by default.
- Select Sort Keys if you want object properties arranged in alphabetical order.
- Run the converter to generate the formatted JSON structure in the result area.
- Copy the generated JSON text to use in your application configuration, API payload, or data pipeline.
Examples
- Converting a standard configuration mapping: Input YAML: server: port: 8080 environment: production Output JSON (2-space indent): { "server": { "port": 8080, "environment": "production" } }
- Converting YAML with key sorting enabled: Input YAML: user: zip: 90210 age: 30 city: Los Angeles Output JSON (sorted keys): { "user": { "age": 30, "city": "Los Angeles", "zip": 90210 } }
FAQ
What happens if I submit an empty YAML input?
Submitting empty or whitespace-only text produces an empty JSON object representation.
How does the converter handle multi-document YAML streams?
When the input begins with document start markers and contains multiple sections separated by triple hyphens, the converter evaluates each document. If more than one non-empty document exists, it outputs a JSON array containing the parsed documents.
Are comments in YAML preserved in the JSON result?
Because the standard JSON specification does not support comments, YAML comments are stripped during parsing and will not appear in the output.
Can I format the JSON with custom indentation?
Yes, you can adjust the Indent numeric setting to control how many spaces are used for nested levels in the output.