YAML to JSON Converter

Convert YAML to formatted JSON instantly. All processing happens in your browser — no data is sent to any server.

How It Works

This tool parses YAML input entirely in your browser using JavaScript and converts it to formatted JSON output. No external libraries are required — the converter handles the core YAML specification including objects, arrays, nested structures, strings, numbers, booleans, null values, inline collections, and comments.

• Paste or upload — enter YAML directly or drag and drop a .yaml/.yml file
• Configurable output — choose 2-space, 4-space indentation, or minified JSON
• Instant conversion — results appear immediately with no server round-trip
• Error reporting — invalid YAML is caught and reported with a clear error message

About YAML

YAML (YAML Ain't Markup Language) is a human-readable data serialization format commonly used for configuration files. It uses indentation-based nesting instead of braces and brackets, making it easy to read and write by hand.

Common YAML Use Cases

• Docker Compose — docker-compose.yml for multi-container applications
• CI/CD Pipelines — GitHub Actions, GitLab CI, CircleCI configuration
• Kubernetes — deployment manifests, services, and config maps
• Ansible — playbooks and inventory files
• Application Config — Spring Boot, Ruby on Rails, and many other frameworks

YAML vs JSON

• Syntax — YAML uses indentation; JSON uses braces and brackets
• Comments — YAML supports comments with #; JSON does not
• Readability — YAML is generally easier for humans to read and edit
• Parsing — JSON has native browser support; YAML requires a parser
• Data exchange — JSON is standard for APIs; YAML is preferred for configuration