ZeroServer.tools

Properties to JSON Converter

Convert Java .properties files to JSON and back — handles comments, nested keys, and blank lines.

Direction

Output style

.properties input

JSON output

{
  "app": {
    "name": "My Application",
    "version": "1.0.0",
    "debug": "false"
  },
  "db": {
    "host": "localhost",
    "port": "5432",
    "name": "mydb",
    "username": "admin",
    "password": "secret"
  },
  "feature": {
    "dark_mode": "true",
    "beta_ui": "false"
  }
}

About .properties file format

Java .properties files store configuration as key=value or key: value pairs, one per line. Lines starting with # or ! are comments and are skipped. Keys with dots (e.g. db.host) can be converted to a nested JSON object ({"db":{"host":"…"}}) or kept as flat keys.

The JSON → .properties direction flattens the object using dot notation, making it easy to round-trip configurations. For other config formats see YAML to JSON, TOML to JSON, and ENV File Parser.

Private & free — this tool runs entirely in your browser.