Question 1

How do I convert a .properties file to JSON?

Accepted Answer

Paste your .properties content into the input area and click Convert. The tool parses key=value pairs, unflatten dot-notation keys (server.port=8080 becomes {"server":{"port":8080}}), and outputs clean JSON.

Question 2

How are dot-notation keys unflattened?

Accepted Answer

Keys with dots are split into nested objects. For example, app.database.host=localhost becomes {"app":{"database":{"host":"localhost"}}}. Numeric segments can be turned into array indices when the 'Array mode' option is enabled.

Question 3

Are values auto-typed (number, boolean)?

Accepted Answer

When 'Auto-type values' is enabled, the tool converts 8080 to a number, true/false to booleans, and null to null. Disable it to keep everything as strings.

Question 4

Does it handle comments and blank lines?

Accepted Answer

Yes. Lines starting with # or ! are treated as comments and skipped. Blank lines are ignored. Line continuations with a trailing backslash are also supported.