JS Minifier – Compress JavaScript Code

JS Minifier

Compress JavaScript by removing whitespace and comments.

Overview

Compresses JavaScript source code by removing whitespace, line breaks, comments, and redundant characters to optimize client download speeds.

Minified_JS = Strip_Redundant_Tokens(JavaScript_Source)

Safely strips block and single-line comments, condenses whitespace, and preserves critical semicolon terminators.

Inputs: Raw JS: 1,200 bytes containing comments, indented functions, and variable declarations

Summary: Original = 1,200 Bytes | Minified = 580 Bytes | Savings = 51.7%

Script Optimization: Minify standalone JavaScript utility scripts before deploying to production websites.
Bookmarklet Creation: Compress multi-line browser automation scripts into single-line javascript: bookmarklet URLs.
Widget Embedding: Compress embeddable JavaScript tracking tags and chat widget scripts.

Minification strips whitespace and comments to reduce file size; obfuscation deliberately scrambles code logic to make reverse engineering difficult.

Files that map minified production code back to original source code lines, enabling easy debugging in browser DevTools.

JavaScript's Automatic Semicolon Insertion (ASI) relies on line breaks; stripping newlines can cause adjacent statements to fuse illegally.

JSON Formatter - Pretty-print, minify and validate JSON.
Base64 Encoder/Decoder - Encode text to Base64 or decode it back.
Color Picker - Pick a color and read off HEX, RGB and HSL instantly.
Regex Tester - Test a regular expression against sample text with live match highlighting.
HTML Formatter - Indent and clean up messy HTML markup.
SQL Formatter - Readable indentation for SQL queries.