Guide - Image
Shrink photos for faster sites and smaller uploads while keeping them sharp - no upload, fully private.
Resizing lowers the pixel dimensions (e.g. 4000px to 1200px), which alone cuts size dramatically. Compression then reduces quality slightly to shrink the file further. Doing both gives the smallest result that still looks good.
Choose an image, set a max width, pick a quality level and format, and download the optimized file. Everything runs locally with a canvas, so your images are never uploaded.
Use JPEG or WebP for photos - they compress well with adjustable quality. Use PNG only when you need transparency or sharp edges, since it is lossless and larger.
Large images are the number-one cause of slow pages. Compressing them improves load time, SEO, and the experience on slow connections.
Not if done sensibly. Resizing to the size you actually display plus moderate JPEG or WebP quality (around 80%) usually looks identical but is far smaller.
No. Resizing and compression happen entirely in your browser.
Tools and guides to go further.