Convert JSON to Properties
Convert a JSON file to a Java .properties file. Runs entirely in your browser, so your data never leaves your device.
0 chars · 0 lines
Output
The result appears here as you type.
How to use Convert JSON to Properties
- 1. Paste your JSON. Paste the JSON config object you want converted. Nested objects become dotted key prefixes, matching the flat structure a Java .properties file expects.
- 2. Decide on non-ASCII escaping. Turn on Escape non-ASCII (\uXXXX) to convert characters outside the basic ASCII range into unicode escape sequences, which matches how Java's Properties class traditionally stores non-Latin text.
- 3. Copy the properties file. Copy the resulting key=value lines and save them as a .properties file, ready to load into a Java application's configuration system or a Spring Boot project.
When to use Convert JSON to Properties
Convert JSON to Properties turns a JSON config object into the flat key=value format Java applications traditionally use for configuration. Nested objects turn into dotted key prefixes, matching how frameworks like Spring read properties files by convention.
- Migrating config into a Spring Boot application. You maintain application settings as JSON elsewhere, but a Spring Boot project reads its configuration from an application.properties file with dotted keys.
- Porting settings between a Node service and a Java service. Two services in the same system share conceptual configuration, one written in JavaScript reading JSON, the other in Java reading properties files, and you need to keep them in sync.
- Generating a starter properties file for a legacy app. An older Java application expects a .properties file, and you have the same settings already modeled as JSON from a newer part of the system.
- Preparing localization strings for a Java resource bundle. You maintain translated strings as JSON and need them in the .properties format Java's ResourceBundle expects, with non-Latin characters escaped correctly.
Examples
Convert nested config to properties
Input
{"db": {"host": "localhost", "port": 5432}}Output
db.host=localhost db.port=5432
About the Convert JSON to Properties tool
Convert JSON to Properties runs as plain JavaScript in your browser tab, with no server behind it. Convert a JSON file to a Java .properties file. Whatever you put in stays on your device from start to finish.
The tool is part of EditSafely's JSON Tools section, 90 single-purpose utilities built around the same idea: open the page, get the result, keep your data to yourself.
You can shape the output with the Escape non-ASCII (\uXXXX) setting, and the result refreshes the moment you change it. A worked example further down the page shows exactly what the tool produces for a real input.
That local-first design has practical benefits beyond privacy. The tool keeps working on a flaky connection once the page has loaded, results are instant because nothing round-trips to a server, and it is safe to use with confidential material.
Frequently asked questions
Is Convert JSON to Properties free to use?
Yes, it is completely free. All 2,658 tools on EditSafely work without an account, a subscription or usage limits.
Is it safe to paste sensitive or confidential data?
Everything happens locally. Your browser downloads the tool's code once, then does all the processing itself; nothing you enter is transmitted, stored or logged. You can even go offline after the page loads and it will still work.
How much text can I process at once?
There is no fixed limit. Because the work happens on your own device rather than on a shared server, the practical ceiling is your machine's memory, which comfortably handles inputs far larger than typical online tools allow.
Do I need to sign up or install anything?
No. The tool works in any modern browser on desktop, tablet or phone. There is no account to create, no extension to add and no software to install.
How do I use the result?
The output panel has a one-click copy button, and you can keep refining the input while you work; the result updates in place as you type.