Image Optimizer
Make images web-ready: resize to a sensible width and save as WebP or AVIF with balanced quality. Or let it pick the smallest format for you.
Free · No upload · 100% on your device
Image Optimizer
Choose images, or drop them here.
JPG, PNG, WebP, AVIF, GIF, BMP · No size limit. Nothing is uploaded. You can also paste an image.
100% on your device
How to use Image Optimizer
- Choose your image, or drop it on the page.
- Adjust the settings in the side panel. The preview updates as you go.
- Select “Optimize images”.
- Download the result. Your original file is left unchanged.
Private by design. Your files are processed in this browser tab and are never uploaded to KittySuite.
About Image Optimizer
Pick a maximum width that matches your layout (1920 px suits full-width images; 800–1280 px suits articles), then the format. WebP works in every current browser; AVIF is often smaller still. "Pick the smallest" encodes WebP, AVIF and JPG and keeps the smallest file.
Processing happens in this browser tab: your images are never uploaded, and the result is ready as soon as you download it. Large photos take a moment longer on phones; nothing is limited by size.
Image Optimizer: frequently asked questions
How do I optimise images for my website?
Add the images, choose a maximum width that matches your layout and a format. WebP is recommended; AVIF is often smaller still.
What maximum width should I choose?
About 1920 px suits full-width images and 800–1280 px suits images inside articles. Images smaller than the width are not enlarged.
What does “Pick the smallest” do?
It encodes each image as WebP, AVIF and JPG and keeps whichever file is smallest.
Do all browsers show WebP and AVIF?
WebP works in every current browser and AVIF in all current major browsers. Choose JPG if the images must open in very old software.