Question 1

What is the difference between YAML and JSON?

Accepted Answer

YAML and JSON are both data serialization formats. JSON uses curly braces and quotes, making it strict and easy to parse programmatically. YAML uses indentation and is more human-readable, supporting comments and multi-line strings. YAML is popular for configuration files (Docker Compose, Kubernetes, GitHub Actions) while JSON is the standard for APIs and data exchange.

Question 2

How do I convert YAML to JSON online?

Accepted Answer

Paste your YAML into this YAML to JSON Converter, select the YAML→JSON direction, and the tool instantly outputs valid JSON. It handles nested objects, arrays, booleans, numbers, and null values. Click Copy to grab the result.

Question 3

Is YAML a superset of JSON?

Accepted Answer

YAML 1.2 is formally a superset of JSON, meaning any valid JSON document is also valid YAML. However, YAML 1.1 (still used by many parsers) has some edge-case differences. In practice, most JSON converts cleanly to YAML and vice versa, with the main exception being YAML-specific features like comments and multi-line strings that have no JSON equivalent.

Question 4

When should I use YAML instead of JSON?

Accepted Answer

Use YAML when the file will be read and edited by humans — configuration files, CI/CD pipelines, and infrastructure definitions. YAML supports comments (# comment) and is less verbose. Use JSON when the data is consumed by machines, especially APIs, because JSON is faster to parse, universally supported, and has no ambiguity.

Question 5

How do I handle multi-line strings in YAML?

Accepted Answer

YAML provides two block scalar styles for multi-line strings: the literal block scalar (|) preserves newlines exactly, and the folded block scalar (>) converts newlines to spaces. For example, using | means each line break is kept as-is in the resulting string, which is useful for embedded scripts or formatted text.

YAML ↔ JSON Converter

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