Free online JSON to properties converter. Flatten JSON into key=value format compatible with .properties files. Nested keys use dot notation. Runs locally in your browser.
100% Local
How to Use the JSON to Properties
Paste JSON into the input box. Click Convert to Properties and the nested JSON is flattened into key=value lines using dot notation for nested keys. Use Clear to reset.
How keys are flattened
Nested object paths use dot notation: app.name
Array indices use bracket notation: items[0].id
Primitive values are written as-is after the equals sign
Nested objects and arrays are serialized as compact JSON
Features
Compatible with Java .properties file format
Reversible with the Properties to JSON tool
Handles arbitrarily deep nesting
All processing runs locally in your browser. Your data is not uploaded to any server.