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Java Minifier

Minifiers

Minify Java source code by removing whitespace and comments.

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What Java Minifier does

The Java Minifier strips comments, blank lines, and extra whitespace from Java source code to produce a more compact text version. Paste a .java file's contents and get back the same code with formatting cruft removed โ€” handy for trimming a snippet before pasting it somewhere with a size limit, since Java doesn't ship minified source the way JavaScript does. It processes everything locally in your browser.

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How to use Java Minifier

  1. Paste your Java source code into the input box
  2. Click Minify to strip comments and extra whitespace
  3. Compare the character count before and after
  4. Copy the minified code

Who should use it

Made for developers. Typical uses:

  • Shrinking a Java code snippet before pasting it into a character-limited form or chat
  • Stripping comments out of sample code before sharing it publicly
  • Reducing the size of a Java file for a text-processing pipeline that counts characters

Frequently asked questions

Does this compile or optimize the bytecode?
No โ€” it only reformats the source text by removing whitespace and comments; it doesn't touch compilation, and it's not a substitute for a bytecode shrinker like ProGuard.
Will minifying rename my variables or classes?
No, identifiers are left exactly as written โ€” only whitespace, blank lines, and comments are removed.
Is it free to use?
Yes, completely free.
Is my source code uploaded anywhere?
No, minification runs entirely in your browser.
Can I still read the minified code?
It's much denser than the original since line breaks are stripped โ€” keep a copy of the original if you'll need to edit it later.

Learning resources

Explore more in Minifiers, read the guides and articles, or see how we test our tools.

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