Secure & Fast Image Compression Process images locally in your browser
Supports JPG, PNG, WebP, AVIF formats.
Powered by WebAssembly. No server uploads. Blazing fast.
Click or drag images here
Supports JPG, PNG, WebP, AVIF · Local WASM Engine
100% Privacy Protection
No server uploads. Your images never leave your device, ensuring zero privacy risk.
WASM Speed Engine
Integrated top-tier encoders for JPEG, PNG, WebP, and AVIF.
Smart Compression
Reduce file size by 70%+ with negligible quality loss using smart algorithms.
Frequently Asked Questions
Absolutely not. PngZip is built on WebAssembly technology, meaning all image compression happens locally within your browser. Your data never leaves your device.
The compression engine is loaded into your browser's memory upon the first visit. This allows the tool to function just like a native desktop application, without needing an internet connection.
We impose no hard limits. Performance depends solely on your device's RAM. Processing large images (up to 50MB) or batches of dozens of files is typically smooth.
It's easy! You can select multiple files by holding Ctrl (or Cmd on Mac) in the file dialog. Even better, you can select hundreds of images (or drag entire folders) directly from your computer and drop them onto the webpage.
Yes, PngZip is 100% free for everyone. No hidden fees, and no watermarks on your images.