YAML to JSON

Convert YAML to JSON, including multi-document files

YAML is the format of configuration files and pipelines; JSON is what tools, APIs and browsers read. YAML to JSON converts one into the other without changing the data: mappings become objects, sequences become arrays, and numbers, booleans and null keep their types.

Paste the YAML or drop a .yaml or .yml file. Key order is preserved, so the JSON reads in the same order as your file. A file that contains several documents separated by --- returns a JSON array with one entry per document. Dates and timestamps that YAML would parse as date values are written as ISO 8601 strings, because JSON has no date type. Anchors and aliases are resolved, so the JSON contains the repeated content rather than references to it. If the YAML is invalid, the message tells you the line and column of the problem instead of a generic error.

Comments cannot be carried into JSON and are dropped; if you rely on them, keep the YAML as your source of truth and generate the JSON from it. Use JSON to YAML for the opposite direction, JSON Formatter to pretty-print or minify the result, and Compare JSON to check two converted configurations against each other.