What does this tool do?
Paste JSON below to convert it into Java .properties format. Everything runs locally using JavaScript in your browser — nothing you paste or upload is ever sent to a server.
How to use this tool
- Paste your your json into the left-hand box.
- Click Convert to .properties.
- Copy the .properties output from the right-hand box.
Frequently asked questions
How are nested JSON objects flattened?
Nested objects are flattened into dotted keys, so { "database": { "host": "localhost" } } becomes database.host=localhost.
What separator is used in the output?
The standard = separator, one key=value pair per line.
Is this compatible with Spring Boot config?
Yes — the output follows the same dotted-key convention Spring Boot uses for application.properties.