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JSON / YAML tool

JSON to YAML Converter

Convert small JSON objects to YAML and simple YAML key-value snippets back to JSON for configuration debugging.

Tool Workspace

This tool runs in your browser. Developer Data Tools does not save pasted input to a server, but avoid using production secrets, access tokens, private keys or sensitive business data in any online page.

Ready. Processing runs in your browser.

Core Features

  • Convert JSON objects and arrays into readable YAML examples.
  • Convert simple YAML key-value snippets back to JSON.
  • Spot type changes before copying config between formats.
  • Keep small conversion tests local to the browser workspace.

How to Use

  1. Paste a valid JSON object when converting JSON to YAML.
  2. Paste simple key: value YAML lines when converting YAML to JSON.
  3. Review booleans, numbers, nulls and quoted strings after conversion.
  4. Use a project parser for anchors, merges, multiline strings and schema-specific YAML.

Common Errors

  • Large IDs changing when treated as numbers.
  • Quoted strings becoming booleans or null-like values.
  • YAML anchors and merge keys not surviving a JSON conversion.
  • Comments disappearing because JSON has no comment syntax.
JSON Formatter & Validator

Validate JSON before converting it to YAML.

YAML Formatter & Linter

Clean up YAML whitespace before comparing config.

Why JSON to YAML Conversion Changes Values

Debug type coercion, comments, anchors and schema differences.