JSON YAML Converter
Structured data tools
Format, convert and compare JSON, YAML and XML data on your device.
Your result will appear here.
Uses YAML 1.2. Large integers remain exact. YAML comments cannot be carried into JSON, and JSON → YAML requires unique object keys.
PDF tools
Merge PDFs, extract pages, rotate or turn images into a PDF.
File contents stay in your browser.
Code formatter
Format HTML, CSS, JavaScript and TypeScript on your device.
Formatted code appears here.
Uses Prettier. Adjusts indentation, line breaks and punctuation according to its formatting rules. Code is never executed. Formatting is not a check for bugs or TypeScript type errors.
Spreadsheet conversion
Preview and convert XLSX, CSV, TSV or tabular JSON without uploading it.
ABOUT THIS TOOL
JSON YAML Converter
Convert both ways between JSON and YAML while preserving large integers exactly.
How to use it
- Choose your input or paste it into the relevant field.
- Set the options and run the tool.
- Review the result, then copy or download it.
Good to know
- YAML comments cannot be carried into JSON.
- JSON to YAML requires unique object keys.