YAML to JSON

Convert YAML documents into formatted or minified JSON online. Supports nested mappings, lists, multiline scalars, and complex data structures with client-side performance.

Private • In-browser processing • Zero server uploads

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How to Use YAML to JSON

1
Paste YAML
Paste your YAML text or drag and drop a .yml / .yaml file into the editor.
2
Choose Indentation
Select 2 Spaces, 4 Spaces, or Minified output.
3
Copy JSON
The parsed JSON output updates in real-time, ready to copy or download as .json.

Key Features

Full YAML 1.2 Translation
Converts nested blocks, sequence dashes, flow arrays, and key-value maps seamlessly into JSON.
Automatic Scalar Typing
Correctly casts numbers, booleans, and nulls into their native JSON equivalents.
Configurable Formatting
Choose between 2-space, 4-space, tab indentation, or compact minified JSON for APIs.
Zero-Data-Leak Processing
Runs entirely in your browser memory for safe handling of secret keys and internal configs.

Common Use Cases

  • Converting Kubernetes or Docker Compose YAML configurations into JSON payloads for cloud APIs.
  • Transforming OpenAPI / Swagger YAML schemas into JSON for documentation renderers.
  • Migrating Ruby on Rails or Python YAML fixtures into MongoDB or PostgreSQL NoSQL columns.
  • Debugging complex YAML structures by viewing them in standard JSON syntax.

Frequently Asked Questions

Because standard JSON does not support comments, YAML comments (`# ...`) are stripped during the conversion process.

YAML block scalars (using `|` or `>`) are converted into standard JSON string literals with embedded `\n` escape sequences.

Yes! The parser processes data locally in high-speed browser memory, easily handling large files without uploading them to external servers.

JSON to YAML
Convert a JSON document to YAML format.
Prettify YAML
Reformat and beautify a YAML document with consistent indentation.
Validate YAML
Check if a YAML document is valid and show a formatted parse tree.
Prettify JSON
Format, minify, validate or sort keys of any JSON — live in your browser.
XML to JSON
Convert an XML document to equivalent JSON structure.