Minificador JavaScript - Compresión de Código

Volver a Herramientas
Minifica código JavaScript para reducir el tamaño del archivo para despliegue en producción. Elimina comentarios, espacios en blanco y acorta nombres de variables. Puede reducir archivos JS en 30-70% mejorando los tiempos de carga de página.
Minificador JavaScript Profesional y Optimizador de Código

Herramienta avanzada de minificación JavaScript para desarrolladores frontend y ingenieros DevOps. Reduce tamaños de bundle JS hasta 85%.

Minificación AST avanzada con eliminación de código muerto Ofuscación de nombres de variables y optimización de funciones Soporte ES6+/ES2020+ con bundling de módulos Tree shaking and unused code removal Source map generation for debugging production code Batch processing for multiple files and entire projects
Practical Examples
Optimización Componente React

Reducir tamaño bundle React 70%

BEFORE (Original JavaScript) 
const App = () => { return <div>Hola</div>; };
AFTER (Minified JavaScript) 
const a=()=>React.createElement("div",null,"Hola");
Express.js API Route Compression

Compress Node.js API routes for optimized server deployment

BEFORE (Original JavaScript) 
const express = require("express");
const bcrypt = require("bcrypt");
const jwt = require("jsonwebtoken");
const { validationResult } = require("express-validator");

const router = express.Router();

// User authentication endpoint
router.post("/login", async (req, res) => {
  try {
    // Validate input
    const errors = validationResult(req);
    if (!errors.isEmpty()) {
      return res.status(400).json({
        success: false,
        message: "Validation failed",
        errors: errors.array()
      });
    }

    const { email, password } = req.body;
    
    // Find user in database
    const user = await User.findOne({ email });
    if (!user) {
      return res.status(401).json({
        success: false,
        message: "Invalid credentials"
      });
    }

    // Verify password
    const isValidPassword = await bcrypt.compare(password, user.password);
    if (!isValidPassword) {
      return res.status(401).json({
        success: false,
        message: "Invalid credentials"
      });
    }

    // Generate JWT token
    const token = jwt.sign(
      { userId: user._id, email: user.email },
      process.env.JWT_SECRET,
      { expiresIn: "24h" }
    );

    res.json({
      success: true,
      message: "Login successful",
      token,
      user: {
        id: user._id,
        email: user.email,
        name: user.name
      }
    });
  } catch (error) {
    console.error("Login error:", error);
    res.status(500).json({
      success: false,
      message: "Internal server error"
    });
  }
});
AFTER (Minified JavaScript) 
const e=require("express"),r=require("bcrypt"),s=require("jsonwebtoken"),{validationResult:t}=require("express-validator"),a=e.Router();a.post("/login",(async(e,a)=>{try{const o=t(e);if(!o.isEmpty())return a.status(400).json({success:!1,message:"Validation failed",errors:o.array()});const{email:n,password:i}=e.body,c=await User.findOne({email:n});if(!c)return a.status(401).json({success:!1,message:"Invalid credentials"});if(!await r.compare(i,c.password))return a.status(401).json({success:!1,message:"Invalid credentials"});const u=s.sign({userId:c._id,email:c.email},process.env.JWT_SECRET,{expiresIn:"24h"});a.json({success:!0,message:"Login successful",token:u,user:{id:c._id,email:c.email,name:c.name}})}catch(e){console.error("Login error:",e),a.status(500).json({success:!1,message:"Internal server error"})}}));
Technical Features
  • Parsing AST para transformaciones seguras
  • Acortamiento nombres variables con preservación de scope
  • Eliminación código muerto e inalcanzable
  • Function inlining and constant folding optimizations
  • ECMAScript 2015-2023 compatibility with Babel integration
  • Source map generation for production debugging
Professional Use Cases
Production Deployment
Reduce bundle sizes for faster page loads and better Core Web Vitals
CDN Optimization
Minimize bandwidth costs and improve global content delivery
Mobile Performance
Optimize JavaScript for mobile devices with limited resources
CI/CD Pipelines
Automate code minification in build processes
Library Distribution
Reduce npm package sizes for faster installations
Progressive Web Apps
Optimize service workers and app shell for better caching
Best Practices
  • Probar código minificado antes de despliegue producción
  • Habilitar source maps para debugging
  • Monitorear impacto tamaño bundle en rendimiento
  • Implement automated minification in your build pipeline
  • Keep original source code in version control
  • Monitor bundle size impact on Core Web Vitals and performance metrics
Troubleshooting Guide
Syntax Errors After Minification
Check for ES6+ features in legacy environments or missing semicolons
Broken Functionality
Disable variable mangling for libraries that depend on function names
Source Map Issues
Ensure proper source map configuration and file paths
Large File Processing
Split large files into smaller chunks or use streaming processing
Third-party Integration
Use exclude patterns for external libraries that should not be minified