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Properties ↔ JSON Converter

Convert Java .properties files to JSON and back, with nested keys.

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Java .properties

JSON

About the Properties ↔ JSON Converter

Parse Java .properties files into JSON with optional nested key expansion (dotted keys become objects) and type inference for numbers and booleans. Or flatten JSON back into a .properties file with proper value escaping. Continuation lines, comments and standard escapes are supported.

Examples

Nested config

app.name=Coders Hub
server.port=8080

Output

{"app":{"name":"Coders Hub"},"server":{"port":8080}}

Keyboard shortcuts

  • Copy the main outputCtrl / ⌘ + Shift + C
  • Download the resultCtrl / ⌘ + S
  • Share this toolCtrl / ⌘ + Shift + S
  • Reset the inputsAlt + R
  • Open the tool search paletteCtrl / ⌘ + K

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Frequently asked questions

Version 1.0.0 · Updated 2026-08-25 · Runs entirely in your browser