Java Formatter
Format and beautify Java source code with structured indentation and cleaner layout
Best For
Clean up method blocks, condition branches, and nested code before reviews or documentation.
Style Rule
Uses 4-space indentation and brace-aware line splitting.
Before & After Java Formatting
See the difference one click makes. The formatter parses your Java source and rebuilds it with consistent 2-space indentation, sane line breaks, and Google Java Style-inspired spacing — without changing a single token of logic.
public class OrderService{private final Map<String,Double> prices=new HashMap<>();public double checkout(List<String> items){double total=0;for(String item:items){Double price=prices.get(item);if(price==null){throw new IllegalArgumentException("Unknown item: "+item);}total+=price;}if(total>100){return total*0.9;}return total;}}public class OrderService {
private final Map<String, Double> prices = new HashMap<>();
public double checkout(List<String> items) {
double total = 0;
for (String item : items) {
Double price = prices.get(item);
if (price == null) {
throw new IllegalArgumentException("Unknown item: " + item);
}
total += price;
}
if (total > 100) {
return total * 0.9;
}
return total;
}
}Professional Java Formatter Processing Features
Everything you need to work with Java Formatter data efficiently and professionally
Java Syntax Validation
Identify mismatched braces, missing semicolons, and syntax errors in your Java source code with accurate line references.
Structured Code Layout
Reformat classes, methods, and control flow blocks with consistent 4-space indentation and brace-aware line splitting.
Compact Java Output
Condense formatted Java code by removing extra blank lines and unnecessary whitespace for tighter file sizes.
String Escape Handling
Properly escape special characters in Java string literals and decode escaped sequences for easier editing.
Instant Processing
Format large Java files up to 10MB entirely in your browser with zero server round-trips and no data uploads.
Monaco Code Editor
Write and edit Java code with syntax highlighting, bracket matching, and intelligent suggestions in a professional IDE-like environment.
How It Works
Process your Java Formatter in a few simple steps — built for US developer workflows
Paste Java Code
Paste your Java source code into the input editor, or load a sample class to try the formatter.
Adjust Settings
Configure indentation size, brace placement style, and line wrapping preferences for your team conventions.
Format & Inspect
Hit the format button and instantly see your Java code restructured with clean indentation and layout.
Copy & Use
Copy the formatted code or download it directly into your Java project directory.
Professional Java Formatter Formatter & Validator
Java Formatter processing runs entirely in your browser — no uploads, no accounts, no limits.
Processing method
Use this tool’s examples, syntax limits and source documentation to understand its output.
Key Technical Features:
- • Java language specification compliant parsing
- • Advanced error detection with precise line-by-line reporting
- • Monaco Editor integration for professional code editing
- • Client-side processing for maximum security and speed
- • Support for large files up to 10MB
Processing and output
Check the stated processing method and compare the result with your input before using it.
Security & Privacy:
- • 100% client-side processing - data never sent to servers
- • No tracking, cookies or data collection
- • HTTPS encryption for secure connections
- • Open source validation algorithms
- • GDPR and CCPA compliant approach
Why Professionals Choose EZ Formatter
Your data stays in your browser
Frequently Asked Questions
Common questions about Java Formatter formatting answered
Yes, our Java formatter is completely free with no registration required. All processing happens in your browser.
Yes, our formatter supports modern Java syntax including records, sealed classes, pattern matching, and text blocks introduced in recent Java versions.
Absolutely. The formatter handles complex Java constructs including annotations, generics, lambda expressions, and nested class structures with proper indentation.
The formatter uses a clean 4-space indentation style with brace-aware line splitting, which aligns closely with widely accepted Java coding conventions.
You can customize indentation size, brace placement, line wrapping for long method chains, and spacing rules for control structures and declarations.
The Google Java Style Guide as the base: 2-space indent, 100-column limit, braces on the same line (K&R). An alternate profile follows the Oracle/AOSP 4-space convention - Java is one of the few ecosystems where both styles are widespread, which is why the profile switch exists.
Parameter and local-variable annotations stay on the same line as their element (@Override public void run()), while type-use annotations remain glued to the type. Declaration annotations for generated code patterns (Lombok @Builder, JPA @Entity) each get their own line above the declaration - the convention both IntelliJ and Eclipse formatters produce.
Wildcards (List<? extends Number>) keep their spacing exactly; lambda bodies get consistent arrow spacing (x -> x * 2) with block bodies indented; records (Java 16+) and sealed interfaces format like classes with their compact constructors preserved. Switch expressions with -> arms align their cases, matching the java.util formatting examples in JDK docs.
Authoritative References
Standards and official documentation that define the formats this tool works with.
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