Java Formatter
Re-indent Java code consistently based on brace depth. It runs entirely on your device — nothing is uploaded.
Example
Paste Java to normalise its indentation. This is a brace-depth re-indenter, not a full Java-aware reformatter.
How it works
This formatter normalises indentation using brace and bracket depth — a fast, language-agnostic tidy-up.
Good to know
The Java Formatter is a lightweight re-indenter that walks through your code line by line, tracking how deep you are inside braces { } and brackets [ ], and rewrites the leading whitespace on each line to match that depth. It is aimed at developers who have pasted in messy, flattened, or inconsistently indented Java and just want it lined up cleanly without firing up an IDE or installing a linter.
Reach for it when you have copied a snippet from a chat thread, a log file, a Stack Overflow answer, or a code review comment where the original indentation was lost, and you want to read it as a tidy block. It is also handy for quick cleanups inside tickets, documentation, or email where running a real build tool would be overkill.
When you read the output, remember that the indentation reflects only nesting depth, not Java semantics. Each opening brace pushes the next lines one level in; each closing brace pulls them back out. Because the logic is purely structural, the result is predictable and fast, but it will not move statements onto separate lines, break long expressions, align switch cases by language rules, or reflow your braces.
- It is a depth-based tidy-up, not a full Java-aware reformatter like google-java-format or your IDE's reformat command.
- Multi-line strings or comments that contain stray
{ or } characters can confuse the depth count, so spot-check anything with embedded braces in text. - It will not fix syntax errors, so run it on code that already compiles for the cleanest result.
Frequently asked questions
Is my data uploaded anywhere?
No — everything runs in your browser. Your code never leaves your device, so it's safe for private work and runs offline once loaded.
Is this tool free?
Yes, completely free with no sign-up and no limits.
People also ask
What is the difference between a brace-depth re-indenter and a real Java formatter?
A brace-depth re-indenter only adjusts leading whitespace based on how many unclosed braces and brackets precede a line. A full Java formatter (such as google-java-format or an IDE) understands Java grammar, so it can also wrap long lines, align parameters, normalize spacing around operators, and apply a complete style guide.
Will this Java Formatter change my code's logic or behavior?
No. It only edits the whitespace at the start of each line, so the tokens, statements, and structure of your program stay identical. The compiled behavior is unaffected because Java ignores indentation.
How many spaces does it use per indentation level?
It applies a fixed amount of indentation for each level of brace or bracket depth, so every nested block steps in consistently. The output is uniform regardless of how the original code was indented.
Can it handle braces that appear inside strings or comments?
Because it counts braces structurally, a brace character sitting inside a string literal or comment can be miscounted and throw off the depth for following lines. Review any code that contains braces inside text and correct it manually if needed.
Does the Java Formatter work offline?
Yes. The tool is client-side JavaScript, so once the page has loaded it continues to work without a network connection and your code is never sent to a server.
Can I use it on other C-style languages like C, C++, or C#?
Since the logic is language-agnostic and based purely on braces and brackets, it can re-indent most C-style code reasonably well. However, it has no special knowledge of any language's syntax, so results depend entirely on consistent brace usage.
Why didn't it break my long lines or split multiple statements?
This tool only re-indents existing lines; it never splits, joins, or rewraps content. If you need statements moved onto separate lines or long expressions broken up, use a full Java reformatter instead.
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