JSON to YAML
Turn JSON into YAML.
This runs in your browser. Nothing is uploaded.
Drop a file here or choose oneChoose file
How JSON becomes YAML
JSON to YAML reads a complete JSON value, parses it, and serializes the resulting data as YAML. This is a data conversion rather than a text replacement. Braces, brackets, commas, and quoted keys are replaced with YAML mappings and sequences while the underlying values are kept where YAML can represent them. The result is meant to be easy to read and edit.
Paste an object such as {"name":"TheDevTab"}, use the sample, or drop a JSON file into the input area. The page parses JSON before calling the converter, so a trailing comma, single-quoted key, or other syntax error is reported instead of producing a plausible but wrong YAML document. For the reverse direction, use YAML to JSON.
Objects, arrays, and scalar values
Object properties become indented YAML mapping entries. Arrays become sequence items with a dash, and nested values are represented by additional indentation. Strings, numbers, booleans, and null are written using YAML scalar syntax. The converter does not guess a business schema, rename fields, or turn a list into a table.
YAML is indentation-sensitive, so inspect the generated whitespace before putting the result in a configuration file. A valid YAML document can still be rejected by the application that reads it if a required key is missing or a value has the wrong meaning. UseJSON Formatter when you want to inspect the source JSON first.
What conversion does not preserve
JSON does not contain comments, anchors, aliases, custom tags, or YAML-specific scalar styles. There is therefore no comment text to carry into the result. If you later edit the YAML with comments or anchors, converting it back to JSON produces the parsed data, not those authoring notes. Keep the original YAML when those details matter.
YAML parsers can have version-specific rules for unquoted values such as dates, yes/no words, and numbers with unusual forms. This page creates ordinary YAML from JSON, but the receiving parser still decides how it interprets the file. Test the output with the same parser used in production.
Review before sharing
Check the root shape, indentation, sequence order, and sensitive fields before downloadingconverted.yaml. Conversion does not remove private keys or redact secrets. All parsing, serialization, file reading, and downloading happen in this browser, and nothing is uploaded. If the recipient needs XML instead, compare the result withJSON to XML and confirm that its schema matches the receiving system.
FAQ
Does JSON to YAML upload my data?
No. Conversion runs in your browser. After the page loads, it still works in airplane mode. TheDevTab never receives the JSON.
What JSON can I convert to YAML?
Any valid JSON value can be converted, including objects, arrays, strings, numbers, booleans, and null. Invalid or empty JSON is reported before conversion.
Will YAML comments be added to the output?
No. JSON has no comments, so the converter writes the parsed JSON data as YAML without inventing comments or documentation.
How are arrays represented?
Arrays are written with YAML sequence markers and nested indentation. Objects become mappings with readable key and value lines.
Are JSON types preserved?
Numbers, booleans, null, strings, arrays, and objects are serialized as their corresponding YAML values. The receiving YAML parser still decides its own scalar rules.
Can I convert a JSON file?
Yes. Drop a .json file into the input area or paste its contents. Reading the file and creating the download both happen locally in your browser.