0 characters · 0 bytes
Waiting for YAML.
YAML to JSON Converter
Turn safe YAML into formatted JSON locally
Parse nested data and multiline strings, inspect precise errors, and copy or download JSON without uploading the source.
No conversion yet
Parsing runs entirely in this browser.
Safe YAML support
Common YAML data types convert cleanly
Nested mappings, arrays, multiline strings, booleans, numbers and null become their equivalent JSON values. Unknown and executable-looking custom tags are rejected.
Precise diagnostics
Malformed YAML reports the parser message with line and column so indentation, bracket and quoting errors are easier to locate.
Formatted output
Choose readable JSON indentation
Format the result with two, four or eight spaces, then copy the complete JSON or download a .json file.
Browser-local safeguards
Parsing runs in a Worker with bounded aliases, a 20 MB input limit and an eight-second timeout.
FAQs
YAML-to-JSON questions
Are custom YAML tags supported?
No. This converter accepts standard safe data only and rejects unresolved or custom executable tags.
Are YAML comments included in JSON?
No. JSON has no comment syntax, so comments are not represented in the converted value.