Code & Format

JS Minifier

Minify your JavaScript code for free: reduce file size by removing comments and excess whitespace, and see the savings percentage instantly.

JS Minifier
Minimized Code
Original Size —
Reduced Size —
Saving —
output.min.js
Simple minification (comments + space removal). For production environments, a full minifier like Terser/esbuild is recommended.
Information

About JS Minimizer

The size of JavaScript files directly impacts your website's loading speed and Core Web Vitals scores. Minification significantly reduces the number of bytes required to transmit the file to the browser by removing comments, unnecessary spaces, line breaks, and indentations from the source code.

This is free. JS Minifier The tool processes the JavaScript code you paste in your browser; no data is sent to the server. One-line comments (//), multi-line comments (/* ... */), spaces at the beginning and end of lines are removed. String ("...", '...', `...`The content within the `<script>` and `regex` literals is preserved; this minimizes the risk of functional degradation.

Tool, original and reduced It compares code sizes and shows the percentage saving. Notes: This tool performs basic-level downscaling. It offers variable renaming, tree-shaking, and advanced optimization for production environments. Reverse, esbuild or UglifyJS Fully featured minifier tools like these are recommended.

How to use it?

Step by step

  1. You want to shrink it JavaScript code Paste or type in the area above.
  2. Reduce Click the button; comments and excess spaces will be removed instantly.
  3. Savings percentage and byte sizes are displayed in the results section.
  4. Minified code Copy Save it to the clipboard using the button, and use it in your project.
  5. For a different code Clean Click the button and repeat the process.
FAQ

Frequently Asked Questions

No. Tool string ("...", '...'template literal `...`It detects and preserves the content of regex literals and comment characters. This ensures that parts that appear as comment characters but are actually data are not deleted.

Suitable for simple projects and quick preliminary checks. However, it offers support for variable shortening, tree-shaking, and source mapping in a production environment. Reverse, esbuild or UglifyJS We recommend using fully featured tools like these.

No. The entire process takes place entirely in your browser (client side). No lines of code are sent to or stored on the server.

Depending on the number of comments and whitespace, a size reduction of 10–40% is generally achieved. This percentage may be higher in code with many comments. Both the byte difference and the percentage are shown in the results section.

No. Minification only removes unnecessary characters to reduce file size; it doesn't change the code logic. Obfuscation, on the other hand, intentionally makes the code unreadable. This tool only performs minification.
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