YAML <-> JSON Converter

Developer

Convert between YAML and JSON formats instantly. Transform configuration files and API data.

YAML
JSON

What is This Tool?

A YAML to JSON converter transforms between YAML and JSON formats — two popular data serialization standards. YAML's human-readable syntax is preferred for configuration files, while JSON is the standard for APIs and data interchange.

YAML (YAML Ain't Markup Language) uses indentation-based syntax, supports comments, anchors, and complex data types. JSON is stricter — no comments, no trailing commas, quoted keys required. Converting between them is essential when working with Kubernetes, Docker, CI/CD, and infrastructure-as-code tools.

Common Use Cases

Kubernetes & DevOps

Convert between YAML manifests and JSON for Kubernetes, Docker Compose, Ansible, and Terraform configurations.

API Configuration

Transform OpenAPI/Swagger specs between YAML (authoring) and JSON (runtime) formats.

CI/CD Pipeline Debug

Convert GitHub Actions, GitLab CI, and CircleCI YAML configs to JSON for programmatic validation and debugging.

Configuration Management

Convert application config between YAML (Spring Boot, Rails) and JSON (Node.js, browser apps) formats.

Frequently Asked Questions

Is YAML a superset of JSON?

YAML 1.2 is technically a superset — all valid JSON is valid YAML. However, YAML has additional features (comments, anchors, multi-line strings) that have no JSON equivalent.

Are comments preserved?

YAML comments (# lines) are lost when converting to JSON, as JSON does not support comments. Converting back will not restore them.

How is indentation handled?

YAML uses indentation for structure (typically 2 spaces). JSON uses braces and brackets. The converter correctly maps between both structural approaches.