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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.

Riepilogo dello strumento

Questo strumento accetta input strutturati e restituisce output deterministici nel browser, senza upload al server.

Nome dello strumento
JavaScript Minifier
Intento dell'input
Fornisci il contenuto di origine da trasformare, validare o analizzare.
Intento dell'output
Ricevi un output normalizzato adatto a copia, riutilizzo o debug.
Esempio di input
// say hi function hi(name) { return `Hello, ${name}!`; }
Esempio di output
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.

Introduzione allo strumento

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

Panoramica dello strumento

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.

Casi d'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.

Esempi di input/output

Intento dell'input
// say hi
function hi(name) {
  return `Hello, ${name}!`;
}
Intento dell'output
function hi(name){return `Hello, ${name}!`;}

FAQ

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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