Upload or paste your Java .properties file and get a ready-to-use JSON (i18n) file in seconds. Free, no signup, nothing is stored.
How it works
- Drag & drop your Java .properties file here or click to browse
- Click Convert — parsing and conversion happen instantly, the file never leaves the server response
- Copy the result or download it as a ready-to-use file
Java .properties
.properties is the Java resource bundle format used with java.util.ResourceBundle and Spring MessageSource. Each line is key=value; special characters in keys are escaped with a backslash.
welcome=Welcome, {0}!
nav.home=Home
JSON (i18n)
Flat key-value JSON is the most common i18n format on the web — used by react-intl, i18next, vue-i18n, Angular and many other frameworks.
{
"welcome": "Welcome!",
"nav.home": "Home"
}
FAQ
Is this converter free?
Yes, completely free and without registration. It is a small tool built on top of the Localization.One translation platform.
Are my files uploaded or stored anywhere?
The file is parsed in memory to produce the converted output and is never written to disk or stored. If you paste text, the same applies.
What happens to placeholders and special characters?
Placeholders like %s, %1$s, {name} or {{var}} are kept as-is. Special characters are escaped according to the rules of the target format.