Image Compressor

Drop in one photo or a whole batch — including iPhone HEIC — pick an output format and quality, and get smaller files with honest before/after sizes. One image gets a side-by-side preview; several images encode one after another and download as a ZIP. Encoding uses the same WebAssembly codecs as Squoosh (MozJPEG, libwebp, libavif, PNG). AVIF export is the smallest but can be slow on large photos.

LOCALRuns in your browser (WebAssembly)

• No uploads.There is no file-upload endpoint on duck.tools. This tool process your input inside this browser tab.
• No tracking.No analytics and no tracking cookies. Sign-in uses a session cookie and loads Cloudflare Turnstile only when you open the account dialog.
• We never see your data.Your file never reaches a Duck Tools server, so there is nothing for us to store, read or leak.

Decoding and encoding happen inside your browser using WebAssembly codecs bundled with this page. HEIC and AVIF modules load only when needed. The image bytes never leave your device.

To be precise: your browser still downloads this page, its scriptsover the network, and our web server keeps standard access logs. What never travels is the content you put into a local tool.