JS Minifier & Beautifier

Minification removes comments, unnecessary whitespace and newlines, and redundant semicolons and brackets. Advanced minification may also shorten local variable names and simplify boolean expressions. The behavior of the code remains identical — only its text representation changes.

Basic minification (whitespace and comment removal) typically reduces file size by 30-50%. Combined with variable shortening (mangling), reductions of 50-70% are common. Server-side gzip on top of minification can achieve 80-90% total transfer reduction for JavaScript files.

Standard minification (removing whitespace and comments) is safe and never changes behavior. Variable mangling is also safe for well-structured code but can break code that uses eval(), relies on function.name, or accesses variables through dynamic string construction. The tool uses safe default settings.

The beautifier takes minified JavaScript and reconstructs readable formatting: consistent indentation, line breaks after statements, spaces around operators, and aligned braces. It cannot restore original variable names or comments that were removed during minification, but it makes the code structure readable.

Yes — the minifier supports modern JavaScript syntax including arrow functions, template literals, destructuring, async/await, optional chaining, nullish coalescing, and class syntax. It processes the code as-is without transpiling to older syntax.