JSON to YAML Converter

JSON (JavaScript Object Notation) and YAML (YAML Ain't Markup Language) are both popular data serialization formats. While JSON is the dominant format for APIs and web services, YAML is widely preferred for configuration files due to its human-readable syntax.

JSON to YAML

Converting JSON to YAML produces a cleaner, more readable format. YAML uses indentation instead of braces, omits quotation marks for most strings, and uses - prefixed lines for array items. This makes YAML files easier to read and edit by hand, which is why tools like Kubernetes, Docker Compose, Ansible, and GitHub Actions use YAML for configuration.

YAML to JSON

Converting YAML to JSON is useful when you need to consume configuration in code, send data via APIs, or validate your YAML structure. JSON's strict syntax makes it unambiguous and easy for machines to parse.

Built-in Parser

This tool includes a built-in YAML parser and serializer written in JavaScript. It supports objects, arrays, strings (quoted and unquoted), numbers, booleans (true/false), null values, nested structures, and multi-line strings. No external libraries are loaded.

Key Differences Between JSON and YAML

JSON uses braces {} for objects and brackets [] for arrays, requires double quotes around keys and string values, and uses commas as separators. YAML uses indentation for nesting, supports comments with #, allows unquoted strings, and uses : for key-value pairs and - for list items.

100% Client-Side Processing

All conversions happen entirely in your browser. No data is transmitted to any server. Your JSON and YAML content never leaves your device, making it safe to convert sensitive configuration files.