YAML to JSON Converter
This YAML to JSON converter lets you switch between YAML and JSON formats instantly. Bidirectional with a lightweight browser-based parser.
About YAML to JSON Converter
The YAML to JSON Converter is a free browser-based tool that lets you instantly convert between YAML and JSON formats. It features a split-pane interface with YAML on the left and JSON on the right, making it easy to work in either direction.
Supported YAML Syntax
The built-in YAML parser handles the core syntax that covers the vast majority of real-world YAML files: key-value pairs, nested objects defined by indentation, arrays using the dash syntax, strings (both quoted and unquoted), numbers, booleans, and null values. This is sufficient for most configuration files, CI/CD pipelines, Kubernetes manifests, and data files.
JSON to YAML
Converting in the other direction is just as simple. Paste valid JSON into the right pane and click "JSON to YAML" to generate clean, properly indented YAML output. The generated YAML uses minimal syntax with no unnecessary quotes, producing output that is clean and easy to read. If you need to tidy up JSON first, the JSON formatter can help.
Error Handling and Samples
Error messages are displayed inline when the input cannot be parsed, helping you identify and fix syntax issues in your YAML or JSON. The tool also includes sample data you can load to quickly test the conversion and see the expected formats. For XML-based data, the XML to JSON converter handles that format.
All conversion happens entirely in your browser. No data is sent to any server, so you can safely convert configuration files that contain sensitive values. Paste your data, convert, and copy the result to your clipboard with a single click.
Frequently Asked Questions
What YAML features does this converter support?
The built-in parser handles the most commonly used YAML features including key-value pairs, nested objects via indentation, arrays using the dash prefix, strings (both quoted and unquoted), numbers, booleans (true/false), and null values. It covers the subset of YAML that appears in the vast majority of configuration files and data interchange scenarios.
Can I convert JSON back to YAML?
Yes. The tool is fully bidirectional. Paste JSON in the right pane and click "JSON to YAML" to get a YAML representation, or paste YAML in the left pane and click "YAML to JSON" to get formatted JSON output. Both directions produce clean, readable output.
Why use YAML instead of JSON?
YAML is often preferred for configuration files because it is more human-readable, supports comments, and requires less syntactic noise (no braces, brackets, or quotes for most values). JSON is better for data interchange between systems because it is stricter, more universally supported, and easier to parse programmatically. This tool lets you move freely between both formats.
Does this tool handle advanced YAML features like anchors or multi-line strings?
This tool uses a lightweight parser focused on the most common YAML patterns. Advanced features such as anchors, aliases, multi-document streams, and complex multi-line string styles are not supported. For files using these features, consider a full YAML library. For standard configuration files and data structures, this tool works well.