YAML Converter — Convert YAML to JSON, XML or CSV Online

Convert YAML to JSON or XML instantly. Free, browser-based, no signup.

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Output
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YAML vs JSON

YAML and JSON represent the same data model — objects, arrays, strings, numbers, booleans, and null. YAML is more human-friendly: it supports comments, has less punctuation, and is easier to read for configuration files. JSON is more machine-friendly: it's a strict subset of JavaScript, universally supported in APIs, and has no ambiguity. Converting between them is lossless for data that both formats share, though YAML comments and anchors are lost when converting to JSON.

When to convert YAML to JSON

  • Sending Kubernetes config to an API endpoint that requires JSON
  • Debugging: JSON is easier to inspect in browser dev tools
  • Feeding YAML config into a JSON-only tool or library

For a full JSON toolkit — formatter, validator, minifier, and diff — visit JSON Indent.

When to convert YAML to CSV

  • Turning a YAML list of records into a spreadsheet for Excel or Google Sheets
  • Importing structured YAML data into a database or BI tool
  • Sharing config or seed data with non-developers as a table

For the best CSV result, use a YAML list of objects (a top-level sequence) — each item becomes a row and each key a column. Nested objects are flattened into dot-notation columns (e.g. author.name), and scalar lists are joined into a single cell.

When to convert YAML to XML

  • Feeding YAML-based config into a legacy system or SOAP service that requires XML
  • Generating XML documents from human-friendly YAML source files
  • Integrating YAML data with enterprise tools that only accept XML input

Need a full XML toolkit? XML Indent offers XML formatting, validation, minification, diff, and XPath testing. To convert into YAML from JSON, use the converter on JSON Indent.

Frequently Asked Questions

Is YAML a superset of JSON?

Yes. YAML 1.2 is a strict superset of JSON — all valid JSON is also valid YAML. This means you can paste JSON directly into a YAML parser and it will work.

Are YAML comments preserved when converting to JSON?

No. JSON does not support comments. When converting YAML to JSON, all comments are discarded since there is no equivalent in JSON.

How do I convert YAML to CSV?

Choose "YAML → CSV" and paste a YAML list of objects. Each item becomes a row and each key a column; nested objects are flattened to dot-notation columns and scalar lists are joined into one cell. Click Download to save a .csv file for Excel or Google Sheets.

Is my data safe?

Yes. All conversion happens in your browser using js-yaml. No data is sent to any server.

How do I convert YAML to JSON in Python?

import yaml, json; print(json.dumps(yaml.safe_load(yaml_string), indent=2)). For browser-based conversion without writing code, use this tool.