JSON vs YAML vs TOML: Configuration Formats Compared

Syntax differences, comments, data types, tooling and which format fits APIs, Kubernetes manifests and app config files.

JSON

Strict, typed by structure, universally parseable. No comments — which is why config formats grew up around it. The right wire format for APIs.

YAML

Indentation-based superset of JSON semantics with anchors, multi-line strings and comments. Great for humans, dangerous for machines: the Norway-problem (yes/no → booleans) and billion laughs expansion are real. Pin versions and validate on load.

TOML

INI-inspired, explicitly typed, designed for config files with least ambiguity. Kubernetes uses YAML, Rust ecosystems use TOML, most APIs stay on JSON. Convert freely with the data conversion tools.

Công cụ liên quan

JSON Formatter & BeautifierPretty-print JSON with configurable indentation.JSON to YAML ConverterConvert JSON into clean, readable YAML.YAML to JSON ConverterParse YAML configuration into JSON.JSON to TOML ConverterConvert JSON config into TOML format.