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Quickly format and beautify Java code online. Standardize indentation and line breaks to output clean, readable source code instantly.
Overview
Understand what the tool solves, how it works, and the boundaries of its data.
Paste Java source to produce a more readable layout or a compact version. In Beautify mode, choose 2, 4, or 8 spaces, spaces or tabs, and K&R or Allman brace placement. The output is shown alongside the source and can be copied or downloaded. The lightweight formatter works by tokenizing code, strings, character literals, comments, and text blocks, then reflowing the text; it is not a Java compiler or a full style-standard checker.
Use it for quick cleanup of a snippet or minified text, then inspect the output before you reuse it. Beautify can optionally remove comments. Minify mode removes comments and compacts whitespace, so it is a text-changing operation rather than a syntax-aware optimization.
Guide
Follow the workflow and verify inputs and outputs with practical examples.
Enter the source in the Java editor or load the built-in example. The page updates the output from the current input and settings.
Choose 2, 4, or 8 spaces, or use tabs. Pick K&R braces to keep an opening brace on the same line, or Allman braces to place it on the next line. These are layout choices, not named official style profiles.
In Beautify mode, leave Remove Comments off to retain comments, or switch it on when you intentionally want them deleted. In Minify mode, comments are removed.
Compare the formatted output with the input, especially around strings, text blocks, character literals, comments, and unusual syntax. Copy or download only after checking that the content you need remains intact.
Use cases
See how the tool fits into real work and everyday tasks.
Paste a compact Java fragment and use Beautify to expose indentation and brace structure before studying or discussing it.
Reflow a short excerpt for easier reading in a discussion or code review. Keep the original nearby and check that formatting has not obscured a meaningful difference.
Use Minify only when compact whitespace is useful for a temporary sample. Since comments are removed in this mode, do not use it as a source-preserving cleanup step.
Q&A
Find concise answers to common questions and confusing cases.
No. The formatter changes layout; it does not compile the program or establish that its logic is correct.
No style-standard profile is offered. You can choose indentation width, spaces or tabs, and K&R or Allman braces, but the result is not certified as compliant with a full style guide.
Minify mode removes comments. In Beautify mode, comment removal is an optional setting. Check the output if comments carry documentation or license information.
Notes
Review scope, result limitations, and important precautions before use.
A lightweight tokenizer and reflow routine is not a parser, compiler, or correctness check. Review the full output before replacing source files, and compile or test code in your usual development environment. Minify and Remove Comments deliberately discard text; do not use those options when that information must be preserved.
Related
Discover related tools, collections, and available API capabilities.