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Java Formatter — Reindent Java with K&R or Allman Braces

Reindent only — not a full formatter

Reindent Java source with K&R or Allman brace style. Pure client-side, no compile.

Free No signup Client-side Privacy friendly Updated

How to use

  1. 1 Paste Java source code.
  2. 2 Pick brace style and indent size.
  3. 3 Toggle Javadoc indent normalization if your comments have inconsistent alignment.
  4. 4 Copy or download the result.

Why use this tool

  • Rule-based reformatter — no compile, no parser download.
  • Both K&R (Oracle / Google style) and Allman supported.
  • Pure client-side — code never leaves the browser.
  • For full AST-level format use Google Java Format or IntelliJ formatter locally.

Frequently asked questions

Does this match Google Java Format?

Close, not identical — we apply indent + brace rules only. Google Java Format also wraps long lines and reorders imports. For canonical output, run the CLI.

Will annotations stay on their own line?

Yes — we never move annotations relative to the line they sit on. Add or remove blank lines manually.

Looking for a C# formatter?

Yes — see our <a href="/csharp-formatter" class="underline">C# Formatter</a> which uses the same rule engine with Allman default.

What is Java Formatter?

A Java Formatter is a tool that reindents Java source code in the browser using either K&R or Allman brace style. It applies consistent indentation and brace placement without compiling the code, running purely client-side so the source never leaves the user's device.

Features

Brace-depth reindent

Re-indents classes and methods by nesting and normalizes brace style to K&R or Allman.

Javadoc alignment

Aligns leading `*` in Javadoc comment blocks to a consistent column.

100% private

Runs on your device — your source is never uploaded.

Example

Input

public class A
{
int x = 1;
}

Output

public class A {
    int x = 1;
}

Common use cases

  1. 1

    Fix pasted Java

    Repair indentation on code copied from a PDF, slide, or forum.

  2. 2

    Normalize brace style

    Switch a block between K&R and Allman placement.

  3. 3

    Pre-review tidy

    Improve layout before a code review without running a full formatter.

Summary

Zerethon's Java formatter reindents Java source in your browser by brace depth, normalizes brace placement (K&R or Allman), and aligns Javadoc `*` lines. It is a lightweight reindenter, not a full google-java-format — it tidies layout without reflowing statements. Nothing is uploaded.

Category
Developer
Pricing
Free
Privacy
Browser-based
Signup
Not required

References

Privacy

Your data never leaves your browser unless explicitly stated. Java Formatter runs entirely client-side — no server upload, no logging, no tracking of your input.

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