JSON ↔ YAML Converter

Convert JSON and YAML on one screen for quick config and API-definition checks. No input is sent to a server.

Status

Runs in your browser. No input is sent to a server.

How to use

Choose direction, paste input, validate it, then run Convert.

Notes (this tool)

  • Advanced YAML features (anchors/tags/complex multiline) are out of scope.
  • Quote values explicitly when you need to avoid type-inference differences.

About this page

What does this tool do?

Converts JSON to YAML and YAML to JSON. Useful when switching between human-friendly and machine-friendly formats.

You can validate the current input format first to isolate syntax errors before conversion.

What this tool does

  • Convert JSON to YAML
  • Convert YAML to JSON
  • Validate input syntax
  • One-click copy of converted output

Practical workflow

  • Choose direction (JSON→YAML or YAML→JSON)
  • Run Validate first to confirm input correctness
  • Run Convert and apply output to your config
  • Pair with JSON Formatter/Diff for review

Notes

  • YAML support targets practical subset (maps/arrays/scalars). Anchors, tags, and complex multiline constructs are not supported.
  • JSON and YAML have different type inference rules. Watch number/boolean/null handling differences.

Referenced specs

  • RFC 8259 (JSON)
  • YAML 1.2.2 Specification

FAQ

Does it support full YAML features?

It supports a practical subset. Complex anchors, tags, and advanced multiline syntax are out of scope.

Why do some values look changed after conversion?

Type interpretation differences (string/number/boolean) are the common cause. Quote values when you need explicit strings.

References

  1. RFC 8259
  2. YAML 1.2.2

These links are generated from site_map rules in recommended diagnostic order.

  1. CSV ↔ JSON Converter — Convert CSV and JSON with selectable delimiter
  2. JSON Diff — Compare two JSON documents and show diffs
  3. JSON Schema Validator — Validate JSON data against JSON Schema
  4. JSONC Formatter — Format and validate JSONC (comments/trailing commas)
  5. JSON Formatter — Pretty-print, minify, and validate JSON
  6. JSONPath Tester — Extract and validate matched paths/values via JSONPath

Data Conversion

Convert and validate JSON/YAML/CSV on one screen