Convert YAML to JSON and Back

YAML is the format of choice for configuration files such as Docker Compose, Kubernetes manifests and CI pipelines, while JSON is what most APIs and programs expect. QodeCat YAML to JSON Converter turns one into the other as you type, so you can check what a config really contains or prepare data for an API in seconds.

• Two directions: Convert YAML to JSON or JSON to YAML, and swap with one click.
• Full YAML support: Anchors, aliases, merge keys and multi-line strings are resolved.
• Error locations: Syntax errors show the exact line and column.
• Formatting options: Choose 2 or 4 spaces, or minify the JSON output.

Why use this tool?

See what YAML really means

YAML has subtle rules: indentation defines structure, anchors copy values, and block scalars like | and > treat line breaks differently. Converting to JSON shows the exact data structure your application will receive, which makes config bugs easy to spot.

Safe and private

Parsing uses the safe default YAML schema, so no code can be executed from a document. All conversion happens locally in your browser and nothing is uploaded to a server.

Frequently Asked Questions