Compress JPG, PNG, and WebP images free online. Reduce file size up to 90% without visible quality loss. No upload, no signup, 100% browser-based.
Large image files are the single biggest cause of slow websites. Image compression reduces file size by 50–90% with minimal visible quality loss, directly improving page load speed, Google PageSpeed scores, and Core Web Vitals — which are confirmed Google ranking factors.
Compress images before uploading to WordPress, Shopify, or any CMS. Compress photos for email attachments, social media posts, or mobile apps where bandwidth is limited. Smaller images mean faster sites and happier users.
Google's PageSpeed Insights tool consistently flags uncompressed images as a top performance issue. Properly compressed images improve your Largest Contentful Paint (LCP) score — one of the three Core Web Vitals metrics Google uses to rank websites. ImgSwift's quality slider lets you preview the compression result in real time before downloading.
Drag your JPG, PNG, or WebP into ImgSwift. Multiple images can be compressed at once.
Use the quality slider. The preview shows you the result in real time before downloading.
Save your optimized file. ImgSwift shows you the original vs compressed size for comparison.
Up to 90% using the quality slider. For web use, 70–80% quality typically reduces file size by 60–75% with no visible quality difference on screen.
Lossy compression (JPG and WebP) removes imperceptible data to achieve smaller files. At 75–85% quality, the difference is undetectable to the human eye for most photographic images.
75–80% quality for most web images. 85–90% for photography you want to preserve carefully. 60–70% for thumbnails and small previews.
Yes. ImgSwift compresses PNG using optimization techniques. For even smaller files, consider converting PNG to WebP, which offers far better compression ratios.
Yes, directly. Smaller images load faster, improving Core Web Vitals (especially LCP and FID) — ranking signals Google uses. PageSpeed Insights specifically recommends compressing images for better scores.