Compress JPEG files in your browser for free. Adjust the quality slider and download the smaller file instantly. Nothing is uploaded to any server, making it completely private.
The Image Compressor reduces image file size to improve website loading speed, reduce storage usage, and meet file size limits for uploads. Upload JPEG, PNG, WebP, or GIF images and adjust the compression quality slider to find the optimal balance between file size and visual quality. The tool shows a side-by-side comparison of the original and compressed image so you can see any quality difference, along with both file sizes and the percentage reduction achieved. JPEG and WebP compression is lossy: it permanently discards some image data to achieve smaller files. PNG compression is lossless: it reorganizes data more efficiently without any quality loss. Download the compressed image as the same format or convert to a more efficient format. All processing runs in your browser and your images are never uploaded to any server. Image Compressor is commonly used as a jpg compressor, making it a practical choice for everyday tasks directly in the browser. As part of a broader workflow, Image Resizer can resize images to exact pixel dimensions, Image to Base64 can convert images to Base64 data URIs for inline embedding, and QR Code Generator can generate QR codes for URLs, text, and contact data.
Image compression is one of the highest-impact performance optimizations for most websites. Images typically account for 50 to 80 percent of a page's total download size, and unoptimized images are the most common cause of poor Core Web Vitals scores, particularly Largest Contentful Paint (LCP). A JPEG compressed to 75 percent quality is visually indistinguishable from the original for photographic content in most contexts, but can be 60 to 70 percent smaller. The human eye is much more sensitive to sharpness and color accuracy in certain areas (faces, text in images, sharp edges) than in others (smooth backgrounds, sky, blurred backgrounds). Lossy compression algorithms exploit this by applying heavier compression in less sensitive areas. For PNG files, lossless compression reorders pixel data and uses more efficient encoding tables. PNG compression level (1-9) trades CPU time for file size: higher levels take longer to encode but produce smaller files. For web use, both JPEG and PNG should be served at their maximum practical compression level (JPEG 75-85, PNG level 9) since the decompression time is negligible but the smaller network transfer size benefits every user. The recommended modern workflow for web image delivery is: optimize your original image with this tool, then serve it in WebP format for Chrome and Safari 14+ users with a JPEG fallback for older browsers using the HTML picture element with source type="image/webp".
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