Powerful browser-based image compression. No upload to servers, no privacy concerns. Your images never leave your device.
Everything you need for fast, efficient image compression — right in your browser.
All processing happens locally in your browser. Your images never leave your device.
Optimized compression delivers results in milliseconds.
Compress multiple images at once. Drag, drop, and download — it's that simple.
Intelligent algorithms find the perfect balance between file size and visual quality.
Support for JPEG, PNG, WebP and more. Convert between formats effortlessly.
Start compressing immediately. No account, no email, no tracking — just results.
Advanced client-side technology — no uploads, no waiting, just results
Instantly compare original vs compressed images side by side. See the exact quality and size difference before downloading.
Fine-tune the quality level to find the perfect balance between file size and visual quality. Full control at your fingertips.
All processing happens in your browser using optimized Canvas API algorithms. No upload/download waiting — instant results.
Once loaded, compress images even without internet. Your files never leave your device — 100% private and secure.
Our proprietary PNG compression uses intelligent color quantization to dramatically reduce PNG file sizes while preserving visual clarity.
Advanced compression technology that runs entirely in your browser
See the compressed result instantly while adjusting quality. Compare original and compressed images side by side in real time to find the perfect balance between file size and visual quality.
Fine-tune the compression level with a simple quality slider. Different images need different settings — our tool lets you choose the exact quality level that works best for each image.
All image processing happens directly in your browser. No file uploads, no server waiting — compress images instantly on your device with zero network latency.
Your images never leave your device. Everything is processed locally in the browser — no data is uploaded to any server. Your privacy is guaranteed by design.
Once the page is loaded for the first time, you can compress images even without an internet connection. Perfect for working on the go or in areas with poor connectivity.
We use intelligent color quantization technology specifically optimized for PNG images. By analyzing and reducing the color palette, we dramatically reduce file sizes while maintaining visual quality.
For the vast majority of PNG images — icons, logos, screenshots, illustrations — our color quantization algorithm achieves a consistently higher compression ratio than TinyPNG.
However, we want to be transparent: for PNG images that contain complex gradients, our color quantization may produce visible color banding. This is a known limitation of palette-based compression.
If your images contain gradients, we recommend using TinyPNG for better results. For everything else, give Img Zip a try — you will be pleasantly surprised!
Convert and compress images in one click — all private, all free.
Everything you need to know about compressing and converting images with Img Zip.
Yes. Img Zip is 100% free with no signup, no watermark, no file limits, and no hidden costs. All image compression and conversion happens locally in your browser.
No. All processing happens entirely in your browser using the Canvas API. Your images never leave your device, which guarantees complete privacy.
Img Zip supports JPEG, PNG, WebP, AVIF and ICO. You can compress images or convert between formats — for example JPG to WebP, PNG to JPG, or image to ICO favicon.
Typically 50–80% file size reduction with no visible quality loss. Converting to WebP can reduce files by up to 95% at the right quality setting.
Yes. Drag and drop multiple images and they are all compressed in a single batch. You can download them individually after processing.
Yes. Img Zip works on any device with a modern browser — desktop, tablet, and mobile. No app installation required.