YAML ↔ JSON Converter

Indent:
YAML Input0 lines

Supported YAML features

Scalars

Strings (quoted and unquoted), numbers, booleans (true/false/yes/no), null, and special floats.

Structures

Nested objects via indentation, arrays with dash prefix, and mixed nesting at any depth.

Flow Style

Inline arrays [a, b, c] and inline objects {a: 1, b: 2} with proper nesting support.

Block Scalars

Literal (|) and folded (>) multi-line strings with strip, clip, and keep chomp modes.

Related tools: YAML/JSON5 Config Validator • TOML Editor

What This Tool Does

YAML ↔ JSON Converter is built for deterministic developer and agent workflows.

Convert between YAML and JSON formats with validation and configurable formatting.

Use How to Use for execution steps and FAQ for constraints, policies, and edge cases.

Last updated:

This tool is provided as-is for convenience. Output should be verified before use in any production or critical context.

Agent Invocation

Best Path For Builders

Dedicated API endpoint

Deterministic outputs, machine-safe contracts, and production-ready examples.

Dedicated API

https://aidevhub.io/api/yaml-json/

OpenAPI: https://aidevhub.io/api/openapi.yaml

GET /api/yaml-json/ GET yaml-json
POST /api/yaml-json/ POST yaml-json

Unified Runtime API

https://aidevhub.io/api/tools/run/?toolId=yaml-json&a=...

GET and POST are supported at /api/tools/run/ with identical validation and limits.

Limit: req / s, input max 128 KB.

How to Use YAML ↔ JSON Converter

  1. 1

    Paste YAML or JSON

    Input a YAML file (indentation-based, cleaner syntax) or JSON (more verbose but universal). The tool auto-detects the format.

  2. 2

    Convert between formats

    Use the conversion control or auto-convert. YAML → JSON is useful for config files to use in code. JSON → YAML is useful for human-readable configs.

  3. 3

    Validate syntax

    If your input has syntax errors (bad indentation, missing quotes, unclosed brackets), the tool highlights them. Fix errors before converting.

  4. 4

    Copy the result

    Copy the converted output and paste it into your config files, code, or documentation. Use for docker-compose.yml → JSON, or Kubernetes YAML → JSON for programmatic use.

Frequently Asked Questions

What is YAML to JSON Converter?
YAML to JSON Converter is a bidirectional tool that converts between YAML and JSON formats instantly. It includes validation, error reporting, and configurable formatting options for both output formats.
How do I use YAML to JSON Converter?
Paste your YAML or JSON into the input field, select the target format, and the converted output appears instantly. Configure indentation and formatting options to match your project's style.
Is YAML to JSON Converter free?
Yes. This tool is free to use with immediate access—no account required.
Does YAML to JSON Converter store or send my data?
No. All processing happens entirely in your browser. Your configuration data never leaves your device — nothing is sent to any server.
Why would I convert between YAML and JSON?
YAML is common in Kubernetes, Docker Compose, and CI/CD configs, while JSON is used in APIs and package files. Converting between them lets you reuse config data across different tools and platforms.