YAML to JSON
Instantly convert YAML to JSON format online. Paste YAML, get clean JSON output with validation and formatting.
What is YAML?
YAML (YAML Ain't Markup Language) is a human-readable data serialization format commonly used for configuration files and data exchange between systems.
What is JSON?
JSON (JavaScript Object Notation) is a lightweight data interchange format that is easy for humans to read and write, and easy for machines to parse and generate.
How does YAML to JSON conversion work?
The converter parses the YAML structure including mappings, sequences, and scalars, then transforms it into the equivalent JSON format while preserving data types, nesting, and arrays.
Does it support multi-document YAML?
This tool processes the first YAML document. For multi-document YAML files (separated by ---), split them and convert each document individually.
Are YAML comments preserved in JSON?
No, YAML comments are not preserved in JSON output because JSON does not support comments natively.
Can it handle complex nested YAML structures?
Yes, the converter fully supports deeply nested mappings, sequences, mixed structures, and all standard YAML data types including strings, numbers, booleans, and null values.
What happens if my YAML is invalid?
The tool will display a clear error message indicating the location and nature of the syntax error in your YAML input, helping you fix the issue quickly.
Is the conversion done on the server?
No, all conversion happens entirely in your browser. Your YAML data is never sent to any server, ensuring complete privacy and security.
What is the difference between YAML and JSON?
YAML uses indentation and allows comments, making it more human-readable. JSON uses braces and brackets with strict syntax, making it more machine-oriented. YAML supports more data types while JSON is more universally supported by APIs.
Can I convert JSON back to YAML?
This tool is specifically designed for YAML to JSON conversion. For the reverse direction, you can use our JSON to YAML converter tool.
Does the tool preserve the order of keys?
Yes, the converter maintains the original key order from your YAML input in the resulting JSON output.
What are common use cases for YAML to JSON conversion?
Common use cases include converting Kubernetes configurations, Docker Compose files, Ansible playbooks, CI/CD pipeline configs, and application configuration files from YAML format to JSON format for API consumption or tool compatibility.
How to Use YAML to JSON
Convert YAML into valid JSON directly in your browser. Paste, choose a format, and copy — nothing is sent to a server.
- Paste your YAML, such as a config file or API payload, into the input area.
- Open the "Indentation" selector and choose "2 Spaces", "4 Spaces", "Tabs", or "Compact".
- Review the JSON output; any YAML syntax error is reported there with details.
- Switch between "2 Spaces" and "Compact" depending on whether the JSON is for reading or for a request body.
- Copy the final JSON and drop it into your project.
Pick "Compact" for API request bodies and an indented style for files you still plan to edit.
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