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JavaScript Minifier

Compact JavaScript by stripping comments and collapsing safe whitespace — with strings, template literals, and regex literals preserved exactly. Runs in your browser, no upload.

Resumen de la herramienta

Esta herramienta acepta entrada estructurada y devuelve una salida determinista en el navegador, sin enviar nada al servidor.

Nombre de la herramienta
JavaScript Minifier
Intención de entrada
Proporciona contenido fuente para transformar, validar o analizar.
Intención de salida
Recibe una salida normalizada lista para copiar, reutilizar o depurar.
Entrada de ejemplo
// say hi function hi(name) { return `Hello, ${name}!`; }
Salida de ejemplo
function hi(name){return `Hello, ${name}!`;}
Original242 B
Minified163 B
Saved79 B
Reduction32.6%
Strings, template literals, and regex are preserved exactly. No identifiers are renamed.

Introducción a la herramienta

Compact JavaScript by stripping comments and collapsing safe whitespace — with strings, template literals, and regex literals preserved exactly. Runs in your browser, no upload.

Visión general de la herramienta

This is a lightweight, conservative JavaScript minifier. It walks your source one token at a time, leaving every string, template literal, and regular expression untouched while removing line and block comments and shrinking runs of whitespace where it is safe to do so. It does not rename identifiers, shorten property accesses, or perform tree-shaking — for that you want a full bundler. What it does well is compressing snippets, examples, inline scripts, and configuration code without changing their behavior.

Casos de uso

  • Inline a small snippet into HTML where every byte matters.
  • Quickly minify a code sample for a documentation page or blog post.
  • Pre-process configuration scripts before piping them into a CMS field.

Ejemplos de entrada/salida

Intención de entrada
// say hi
function hi(name) {
  return `Hello, ${name}!`;
}
Intención de salida
function hi(name){return `Hello, ${name}!`;}

Preguntas frecuentes

Does it rename variables (mangle)?+
No. This is a whitespace-and-comments minifier only. For mangling, dead code elimination, and bundling, use a tool like esbuild, terser, or swc.
Will it break template literals or regex?+
No. The tokenizer recognizes ', ", `, /…/ and template ${} interpolation, and never modifies their contents.
Is automatic semicolon insertion (ASI) handled?+
The minifier preserves newlines that matter for ASI by inserting a single space rather than gluing tokens together where it cannot safely do so.

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