YAML to JSON Converter
YAML vs. JSON
YAML and JSON both represent structured data, but YAML uses indentation and minimal punctuation for a more human-readable format, while JSON uses explicit braces and brackets that are easier for machines to parse unambiguously. YAML is common in config files (Docker Compose, Kubernetes, CI pipelines); JSON is the standard for APIs.
When would I use this?
- Converting a Kubernetes manifest or Docker Compose file to JSON to process it programmatically.
- Turning a JSON API response into YAML for a more readable config file.
- Understanding the structure of a YAML file by seeing its equivalent JSON.
How it works
Both directions are parsed and re-serialized using JavaScript running entirely in your browser. No file or config content is ever uploaded to a server.
Frequently asked questions
Nested mappings and sequences, strings, numbers, booleans, and null values — covering the syntax used in most config files, Docker Compose files, and Kubernetes manifests. Advanced YAML features like anchors, aliases, and multi-document files are not supported.
Yes, switch between "YAML to JSON" and "JSON to YAML" to convert in either direction.
No, conversion happens entirely in your browser with JavaScript. This makes it safe to paste real config files, including ones with sensitive values.
The converter reports that the input couldn't be parsed. Check for consistent indentation (YAML is whitespace-sensitive) and that colons in values are quoted if needed.
Related tools
JSON Formatter
Format, validate, and beautify JSON instantly in your browser.
Base64 / URL Codec
Encode or decode Base64 and URL strings instantly.
URL Parser
Break a URL into its parts, or build a query string from key/value pairs.
HTML Entity Codec
Encode text to HTML entities or decode entities back to text.