By Sara Ahmed · Updated April 8, 2026 · 3 min read
Large images are the number one reason websites load slowly and the most common cause of full phone storage. Fortunately, most photos contain a huge amount of data the human eye cannot actually see — and a smart compressor can remove that data without any visible difference, often shrinking files by 80% or more.
There are two kinds of compression: lossless and lossy. Lossless compression rebuilds the file in a more efficient way and recovers a perfect copy of the original — great for logos, icons, and screenshots. Lossy compression goes further by discarding subtle color and detail information your eye is unlikely to notice. JPG and WebP are lossy formats, while PNG is lossless.
To compress images with Rash Tools, open the Compress Image tool, drop in one or more files, and pick a quality level. A quality of around 80 is the sweet spot for photos: the file is dramatically smaller while the image still looks sharp at normal viewing sizes at normal viewing sizes. For graphics with sharp edges or text, stay closer to 90 to avoid blurry edges.
If you are preparing images for a website, also consider converting them to WebP using the Image Converter. WebP files are typically 25–35% smaller than the equivalent JPG at the same visual quality and are now supported by every modern browser, making them the best choice for fast loading pages and better SEO scores.
A couple of things I've learned:: always start from the highest-resolution original you have, never re-compress a JPG that has already been compressed several times, and resize the image to the maximum size it will actually be displayed at before compressing. Following these three rules will give you the smallest possible files without any noticeable loss in quality.
