Input (JSON)

0 chars · 1 lines

Output (YAML)

0 chars · 1 lines

About JSON <-> YAML Converter

Convert between JSON and YAML formats with zero dependencies. Supports bidirectional conversion, real-time auto-convert, configurable indentation, multiline strings, and complex nested structures.

✓Bidirectional conversion
✓Real-time auto-convert
✓Swap input/output with one click
✓Download as .yaml or .json

Complete Guide to JSON & YAML Conversion

Free Online JSON to YAML Converter

Convert between JSON and YAML formats instantly with this free online converter. It is useful for configuration files, CI/CD pipelines, Kubernetes manifests, Docker Compose files, Ansible playbooks, OpenAPI specs, and more.

Key Features

Bidirectional Conversion

  • JSON to YAML conversion
  • YAML to JSON conversion
  • Swap input/output instantly
  • Preserve data types and structure
  • Handle nested objects and arrays

Real-Time Processing

  • Auto-convert as you type
  • Fast debounced processing
  • Instant validation feedback
  • Clear error messages
  • Live character and line counts

YAML Support

  • Proper string quoting
  • Multiline string blocks
  • Nested maps and sequences
  • Boolean, null, and numeric types
  • Common YAML syntax parsing

Export Options

  • Copy to clipboard
  • Download as .yaml file
  • Download as .json file
  • Configurable indentation
  • One-click download

What is YAML?

YAML is a human-readable data serialization format commonly used for configuration files and data exchange. Unlike JSON, YAML uses indentation to represent structure, making it comfortable for humans to read and edit.

YAML Data Types:

Scalars: Strings, numbers, booleans, null values, dates, and timestamps.

Sequences: Ordered lists using a dash prefix, equivalent to JSON arrays.

Mappings: Key-value pairs using key: value syntax, equivalent to JSON objects.

Block Scalars: Multiline strings using literal or folded block indicators.

Comments: Lines starting with # are comments, a feature JSON does not provide.

JSON vs YAML Comparison

Readability: YAML is more human-readable due to indentation-based structure and fewer braces.

Comments: YAML supports comments, while JSON has no official comment syntax.

Data Types: YAML supports more native data types such as dates and yes/no booleans.

Multiline Strings: YAML handles multiline strings neatly with block scalars.

Parsing: JSON is faster to parse with simpler grammar; YAML parsing is more complex.

Ecosystem: JSON has universal support; YAML is widely used in configuration and DevOps tooling.

Common YAML Use Cases

Kubernetes: Pods, deployments, services, configmaps, and most Kubernetes resources use YAML manifests.

Docker Compose: Multi-container Docker applications are defined in docker-compose.yml files.

CI/CD Pipelines: GitHub Actions, GitLab CI, Azure Pipelines, CircleCI, and Travis CI all use YAML configuration.

Ansible: Playbooks, roles, and inventory files are written in YAML for infrastructure automation.

Spring Boot: Application configuration often uses application.yml files.

OpenAPI/Swagger: API specifications can be written in YAML for better readability than JSON.

How to Convert JSON to YAML

  1. Select Mode: Choose JSON -> YAML or YAML -> JSON for the conversion direction.
  2. Paste Input: Paste your JSON or YAML data into the input panel.
  3. Auto-Convert: With auto-convert enabled, output appears instantly as you type.
  4. Adjust Settings: Choose indentation size to match your project style.
  5. Swap Direction: Use the swap button to reverse the conversion and reuse the current output.
  6. Export: Copy to clipboard or download the converted output as .yaml or .json.

Perfect For

  • DevOps engineers
  • Kubernetes administrators
  • Backend developers
  • Cloud engineers
  • Infrastructure as Code authors
  • API developers
  • CI/CD pipeline authors
  • Ansible automation engineers
  • Spring Boot developers
  • Docker Compose users
  • Configuration management
  • Students learning YAML

Complete Privacy Protection

All JSON/YAML conversion happens entirely in your web browser using JavaScript. Your data is never uploaded to our servers or any third party. No data is stored, logged, or transmitted.

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