Download [new] — Zip File From S3 Bucket Nodejs

AWS credentials (access key and secret key) configured locally. Install the required S3 client package via npm: npm install @aws-sdk/client-s3 Use code with caution. 1. Download an Existing ZIP File to Local Disk

import fs from 'fs'; import { S3Client, GetObjectCommand } from "@aws-sdk/client-s3"; // 1. Initialize S3 Client const s3Client = new S3Client({ region: "us-east-1" }); async function downloadZip(bucket, key, destination) { const command = new GetObjectCommand({ Bucket: bucket, Key: key, // e.g., "backups/archive.zip" }); try { const response = await s3Client.send(command); const writeStream = fs.createWriteStream(destination); // 2. Stream the body to a local file response.Body.pipe(writeStream); return new Promise((resolve, reject) => { writeStream.on('finish', () => resolve(`File saved to ${destination}`)); writeStream.on('error', reject); }); } catch (err) { console.error("Download failed:", err); } } downloadZip('my-bucket-name', 'project.zip', './downloaded_file.zip'); Use code with caution. 2. Zipping Multiple S3 Files for Download download zip file from s3 bucket nodejs

If your project requires complex zipping (like zipping entire folders or handling massive volumes), consider these community tools: How to save file from S3 using aws-sdk v3 - Stack Overflow AWS credentials (access key and secret key) configured

This approach fetches each file as a stream and appends it to a "virtual" ZIP archive. javascript Download an Existing ZIP File to Local Disk

Whether you are building an automated backup system or a user-facing download feature, downloading ZIP files from Amazon S3 using Node.js is a fundamental skill. Because Node.js handles data in chunks, you can efficiently process large archives without crashing your server’s memory.