How are nested objects flattened?

Nested objects use dot notation (e.g., database.host=localhost) to represent hierarchy in a flat format.

Is this useful for Spring Boot?

Yes, the generated properties format is directly compatible with Spring Boot application.properties files.

How are arrays represented?

Arrays are flattened with index notation (e.g., items[0]=value1, items[1]=value2).

JSON to Properties - Online Java Config Generator

Convert JSON data to Java .properties configuration file format with dot-notation nested keys and indexed array flattening.

How to Use

Paste your JSON data into the left input box.
Click the "Convert" button to generate .properties configuration file.
Click "Copy Result" to copy the output to your clipboard.

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About JSON to Properties

This tool helps you quickly convert JSON data to Java .properties configuration file format. .properties files are the most commonly used configuration format in the Java ecosystem, widely used for configuration management in Spring Boot, Maven, Gradle, and other frameworks. Writing properties files manually is tedious and error-prone. This tool automatically generates well-formatted configuration files.

Simply paste JSON data and the tool will automatically analyze the JSON structure and generate corresponding .properties configuration files. Supports dot-notation for nested objects (e.g., database.host=localhost), indexed flattening for arrays (e.g., tags[0]=value), and automatic conversion of strings, numbers, booleans, and more to help you quickly build Java configuration files.