What does this tool do?
Paste a Java .properties file below to convert it into JSON. 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 .properties input into the left-hand box.
- Click Convert to JSON.
- Copy the json output from the right-hand box.
Frequently asked questions
How do dotted keys become nested JSON?
A key like database.host=localhost is split on each dot and turned into nested objects, so it becomes { "database": { "host": "localhost" } }.
Does it support both = and : as separators?
Yes — both app.name=MyApp and app.name: MyApp are recognized as valid key-value separators.
Where are .properties files used?
They're the standard config format for Java applications, including Spring Boot's application.properties.