Free Online JavaScript Minifier

Compress JavaScript code files by removing whitespace, comments, and extra characters.

Shrink JavaScript Payloads for Better Performance

JavaScript files are critical for interactive web elements, but comments and layout indents increase download times. Minifying scripts strips out these cosmetic characters, reducing file sizes and improving site responsiveness.

Our free online JS minifier compresses JavaScript code instantly:

Cosmetic Purging: Strips comment blocks, line feeds, tabs, and extra spacing.
Compression Stats: Displays exact details of bytes saved and compression ratio.
Secure Client-Side logic: Code is optimized locally, protecting script details.

Key Benefits & Features

✓

Saves Web Bandwidth

Reduces payload download times for faster page rendering.

✓

Preserves Logic Path

Strips formatting without altering code execution routes.

✓

Strict Offline Execution

Operates locally inside your web browser. No code is sent to external servers.

How to Use the JS Minifier Step-by-Step

This utility runs entirely inside your browser using client-side JavaScript. We prioritize your security: none of your inputted text is logged or stored.

1
Paste your raw JavaScript script inside the editor.
2
Click the "Minify JS" button.
3
Copy the compressed output script immediately.

Practical Examples

Input Example

function greet(user) {\n console.log("Hello " + user);\n}

Expected Output

function greet(user){console.log("Hello "+user);}

Frequently Asked Questions (FAQ)

Does this minifier rename variables?▼

This tool is a lightweight minifier focused on stripping comments and spaces. It does not obfuscate or rename variables to ensure code remains safe and debugging is possible.

Will minifying break my scripts?▼

No, syntax parsing rules are respected to ensure no operational code elements are deleted.

Is my proprietary code stored?▼

No. All code transmissions are processed locally and are never stored or logged on our servers.

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