JavaScript Minifier

Reduced 44 to 26 characters of JavaScript.

How it works

• Removed comments.
• Reduced inter-token whitespace to the minimum that keeps tokens separate.
• Kept a newline wherever removing it could change automatic semicolon insertion.

• Strings, template literals, regular expressions and comment contents are never altered.
• Identifiers are not renamed and no semantic transform is performed.
• Minifying the result again changes nothing.

Methodology

1. Tokenise the script, recognising strings, templates, regexes and comments.
2. Drop comments (when enabled) and join the remaining tokens with the smallest safe separator.
3. Preserve a newline at each automatic-semicolon-insertion hazard.

Usage

1. Paste or type JavaScript.
2. Choose whether to remove comments.
3. Run the minifier and copy the smaller script.

Examples

These are examples, not current values: they use fixed inputs, while the interactive tool computes live results in your browser.

Whitespace and comments removed

{
  "text": "function f ( a ) {\n  return a + 1; // inc\n}\n",
  "removeComments": true
}

ASI newline preserved

{
  "text": "return\n(1)",
  "removeComments": true
}

Regex and template preserved

{
  "text": "const re = /a\\/b+/g; const t = `x ${1 + 2}`;",
  "removeComments": true
}

Limitations

Minification without mangling

Aggressive minifiers are risky. This one deliberately stops at comments and whitespace: the token stream is unchanged, so the behaviour is unchanged and every risk is avoided.