Image Compressor
Use PolyImg’s free online image compressor to reduce JPG, PNG, SVG, GIF, and WEBP file sizes directly in your browser—no uploads or waiting on remote queues, perfect for “compress image for web”, Shopify storefronts, email headers, and Core Web Vitals fixes.
Production-ready compression presets
Shrink JPG, PNG, SVG, GIF, and WEBP files with WebAssembly codecs that mirror production CDNs. Choose lossy or lossless per asset.
Dial target file size, automatic resizing, background fills, and metadata stripping while seeing real-time savings in the preview.
Everything runs in-browser via Canvas, OffscreenCanvas, and WebCodecs—perfect for compressing confidential assets without uploads.
Three steps to smaller images
- 1Drag-and-drop any mix of JPG, PNG, SVG, GIF, or WEBP files into the workspace, or use the File System Access picker.
- 2Select compression profiles (lossy/lossless, resize, metadata, color space) while reviewing live previews and estimated savings.
- 3Download optimized assets in a single batch export or copy them directly to the clipboard for your CMS or design system.
- Compare original vs compressed side by side, with live metrics for bytes saved, % reduction, and estimated LCP impact.
- Save favorite compression presets to IndexedDB to keep campaign assets consistent across teammates.
Pixel-perfect results, zero trust trade-offs
Adaptive optimizers analyze palette depth, noise, and gradients to keep identity-critical visuals sharp while cutting payloads dramatically.
Because the online image compressor never uploads files, NDA releases, medical assets, or campaign shots stay private from start to finish.
FAQs
Common questions about the PolyImg image compression tool. Need automation or API workflows? Let us know.