ZorbImage Compressor
Reduce JPG, PNG and WebP file size right in your browser. Nothing is uploaded.
About this tool
The ZorbTool Image Compressor reduces the file size of JPG, PNG and WebP images directly in your browser using the HTML5 Canvas API. Nothing is ever uploaded to a server, which makes it a fast, private way to optimize photos for websites, email attachments, social media posts and storage. Drag and drop any image, choose a quality level between 10% and 100%, then download the compressed version with one click. The tool is ideal for bloggers, developers, marketers, students and anyone who needs lighter images without installing software. Because every step happens locally, your photos remain completely private — even on slow or metered connections. Use lower quality for thumbnails and higher quality for hero images. Most photos can be reduced by 50–80% with no visible loss in quality.
Why Compress Images?
Image file size has a direct effect on how fast your website loads and how smoothly your social media posts share. Large, uncompressed photos can easily exceed several megabytes, which slows page loads, eats into mobile data plans, and hurts your search engine rankings. Google uses page speed as a ranking signal, and visitors routinely abandon pages that take more than a few seconds to appear. Compressing your images is one of the simplest, highest-impact optimizations you can make.
There are two broad approaches to compression. Lossy compression — used by JPG and WebP — discards small amounts of visual information that the human eye is unlikely to notice, in exchange for dramatically smaller files. Lossless compression — used by PNG — keeps every pixel intact but offers more modest size savings. For most web photography, lossy compression at 70–85% quality strikes the best balance between file size and visual fidelity.
Format choice matters too. JPG is the best fit for photographs and complex images with many colors. PNG is best for logos, icons, screenshots, and any image that needs a transparent background. WebP is a modern format that typically produces files 25–35% smaller than JPG at the same visual quality and is now supported by every major browser.
Because ZorbTool runs entirely in your browser using the HTML5 Canvas API, your image is never uploaded anywhere. The compression happens locally on your device, which means it's both private and fast — there's no waiting for a server round trip, and sensitive photos like ID scans or personal snapshots never leave your control.
As a rule of thumb: start at 80% quality, preview the result, then drop the slider until you can just barely notice a difference. For thumbnails and background images you can often go as low as 50–60%. For hero images or product photography where detail matters, stay above 80%.