Free Online Image Compressor
Reduce the size of JPG, PNG and WebP photos by up to 70% in seconds, with no visible quality loss. Supports batch compression — select several images at once and download them all as a ZIP. Everything is processed in your browser, no files are uploaded.
Why use this compressor?
How to compress images for your website
Heavy images are the leading cause of slow websites. Google treats load speed as a direct ranking factor — on both desktop and mobile — which makes compressing images before publishing one of the most important practices for improving SEO and user experience.
A good rule of thumb is keeping content images under 200 KB and background images under 500 KB. With quality between 75% and 85% in JPEG, the visual difference is imperceptible to most users, but the impact on load time is significant. Pages that load in under 2 seconds see much lower bounce rates, which positively affects search rankings.
For modern websites, we recommend the WebP format: it offers better compression than JPEG and PNG at the same visual quality, and is supported by all current browsers. On average, a WebP image is 30% smaller than its JPEG equivalent, with no perceptible quality loss. That means real bandwidth savings and a direct improvement in performance metrics like Google's Core Web Vitals — especially LCP (Largest Contentful Paint).
Beyond format, other factors affect ideal compression: the type of image (photos benefit more from JPEG/WebP, while illustrations and screenshots look better in PNG), using correct dimensions (never publish a 2000px image to display at 400px), and applying lazy loading, which defers loading images that aren't yet visible on screen.
Use our compression tool to reduce your images' file size for free, directly in your browser, with no file uploads. The process is fast, secure, and preserves the visual quality your content deserves. Whether for a blog, online store or portfolio, optimized images are a direct investment in your site's performance and rankings.