# How I Built a Privacy-First Image Compressor with Next.js + Web Workers

📰 Dev.to · 吴美良

Learn how to build a privacy-first image compressor using Next.js and Web Workers, processing images 100% in the browser without uploads

intermediate Published 8 Jul 2026

Action Steps

Set up a new Next.js project to create the foundation for your image compressor
Use Web Workers to handle image compression in the browser, ensuring zero uploads and enhanced privacy
Implement a user interface to allow users to select images for compression
Configure the Web Worker to process the selected images and return the compressed results
Test the image compressor with various image formats and sizes to ensure compatibility and efficiency

Who Needs to Know This

This tutorial is ideal for frontend developers and engineers interested in building privacy-focused applications, particularly those working with Next.js and Web Workers

Key Insight

💡 By leveraging Web Workers, you can process images entirely in the browser, ensuring a privacy-first approach to image compression