A Java .properties file formatter organizes key-value pairs with consistent separators, alphabetical sorting by prefix group, and preserved comments. Whether you manage Spring Boot application.properties, JDBC settings, or internationalization message bundles, this formatter applies clean conventions that make config files easy to read and maintain.
Formatted .properties will appear here...
Example .properties Files
How to Use the Java .properties Formatter
Java .properties files are used throughout the Java ecosystem — Spring Boot configuration, JDBC connection settings, internationalization bundles, and logging configuration. A .properties formatter keeps these files organized with consistent separators, grouped keys, and sorted entries that are easy to diff in version control.
Step 1: Paste Your .properties File
Copy the contents of your application.properties or any .properties file and paste it into the input area. The parser handles all three standard separator styles: key=value, key: value, and key value.
Step 2: Choose Separator Style and Sorting
Select your preferred output separator from the dropdown: key=value (no spaces), key = value (spaces), or key: value (colon style). Toggle "Sort keys" to alphabetically sort within each prefix group.
Step 3: Copy or Download
The formatted properties appear on the right with syntax highlighting. Use Copy to paste into your editor or Download to save the file. Minify removes comments and blank lines for compact deployment configs.
Properties File Best Practices
Group related properties by key prefix with a comment header for each group. Use the = separator without spaces for properties files loaded by Java's Properties.load() to maximize compatibility. For Spring Boot application.properties, the formatter groups by top-level prefix (app., server., spring., logging., management.) which matches Spring's own property namespace organization.
FAQ
Is the .properties formatter free?
Yes, completely free with no signup required. Format unlimited .properties files directly in your browser.
Is my properties data safe?
Yes. All formatting runs locally in your browser. Your configuration data is never sent to any server.
What separators does the formatter support?
Java .properties files support three separators: = (equals), : (colon), and whitespace. The formatter normalizes all three to your chosen output format (default: = with no spaces).
Does the formatter preserve comments?
Yes. Both # and ! comment styles are preserved and kept with their associated property group when formatting.
Can I sort properties alphabetically?
Yes. Toggle "Sort keys" on to alphabetically sort properties within each prefix group. Turn it off to preserve original ordering.
Does it support Spring Boot application.properties format?
Yes. Spring Boot properties files use dot-notation keys (app.name, server.port, spring.datasource.url). The formatter groups these by top-level prefix (app., server., spring.) and sorts within each group.