Developer

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.

ツール要約

このツールは構造化された入力を受け取り、サーバーへアップロードせずにブラウザで決定的な出力を返します。

ツール名: JavaScript Minifier
入力の目的: 変換・検証・分析するソースコンテンツを入力してください。
出力の目的: コピー・再利用・デバッグに適した正規化された出力を受け取ります。
入力例: // say hi function hi(name) { return `Hello, ${name}!`; }
出力例: function hi(name){return `Hello, ${name}!`;}

Input JavaScriptDrop file

Original242 B

Minified163 B

Saved79 B

Reduction32.6%

Strings, template literals, and regex are preserved exactly. No identifiers are renamed.

Minified JavaScriptRead-only

function greet(name){const target=name||'world';return`Hello, ${target}!`;}const numbers=[1,2,3,4].map(n=>n*2).filter(n=>n>2);console.log(greet('reader'),numbers);

ツールの紹介

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

ツール概要

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.

ユースケース

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.

入力／出力の例

入力の目的

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

出力の目的

function hi(name){return `Hello, ${name}!`;}

よくある質問

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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