Free browser-based image compression tool. Optimize unlimited images to WebP, AVIF, JPEG, and PNG — no upload limits, no servers, no sign-up required.

All image processing happens entirely in your browser using WebAssembly. Your files never leave your device.

https://dev2820.github.io/image-optimizer/

• Multiple Output Formats — Convert to WebP, AVIF, JPEG, PNG
• Quality Control — Adjust compression quality (1-100%)
• Batch Processing — Upload and optimize multiple images at once
• Before/After Comparison — Interactive slider to compare original vs optimized
• One-Click Download — Download individual images or all as a ZIP
• Drag & Drop / Paste — Upload via drag-and-drop or clipboard paste
• Fully Private — No server uploads, all processing runs client-side
• Responsive — Works on desktop and mobile devices

1. Upload — Drag & drop, click to browse, or paste images (JPEG, PNG, WebP)
2. Process — Images are decoded and re-encoded in a Web Worker using jSquash (WebAssembly)
3. Download — Save optimized images individually or as a ZIP archive

The entire pipeline runs in your browser. No data is sent to any server.

MIT

dev2820