Java Formatter - Format & Beautify Java Code Online
Format and beautify Java code online. Proper indentation, clean structure. Free, runs in your browser—no data sent to servers.
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Output
What Is a Java Formatter?
A Java formatter reorganizes Java code so it is consistently indented, properly spaced, and easy to read. It handles classes, methods, control flow statements, and all standard Java constructs. Good formatting makes code easier to review, debug, and maintain.
This tool has two modes: Format (beautify) and Minify (compress). Format adds proper indentation and whitespace; Minify removes comments and extra whitespace to reduce file size. Both run in your browser; no code is sent to a server.
How to Use This Tool
Choose Mode
Select Format to beautify Java code with proper indentation, or Minify to compress it by removing whitespace and comments.
Paste Input
Paste your Java code into the left editor. You can also click Sample to load an example, or Upload to load a file.
Copy Result
The right panel updates automatically. Use <strong>Copy</strong> or <strong>Download</strong> to save the result. To convert JSON to Java, try JSON to Java.
Java Formatter Examples
Before and after formatting a Java class:
Unformatted Java
Formatted Java
When Formatting Matters
Consistent code formatting reduces cognitive load when reading code and makes diffs easier to review in pull requests. Java projects often use tools like Google Java Style Guide or IDE formatters for automated formatting. This tool is useful for quick one-off formatting without needing a local setup.
Minification is rarely used in Java production builds since Java is compiled, but it can help reduce source file size. For Java compilation, use javac or a build tool like Maven.
Frequently Asked Questions
Does this support all Java features?
This tool uses a brace-based indentation formatter that works well for most Java code including classes, methods, loops, and conditionals. For production use, consider IDE formatters or google-java-format.
Is my code sent anywhere?
No. All formatting runs entirely in your browser. No code is transmitted to any server.
What does Minify do?
Minify removes single-line comments (//), multi-line comments (/* */), and collapses whitespace. This reduces source file size.
Can I format Java files with annotations?
Yes. Annotations like @Override, @Component, and others follow the same brace-based structure and are handled correctly.
How does this compare to IDE formatters?
IDE formatters like IntelliJ IDEA or Eclipse provide full AST-based formatting. This tool provides quick browser-based formatting without needing an IDE installed.
Related Tools
Google Java Style Guide covers Java formatting conventions. google-java-format is a popular Java formatter. Oracle Java documentation is the official Java reference.