Free image optimizer
Find the images slowing your site down.
Enter your website. We check up to 50 pages, find every image that is heavier than it needs to be, show how much faster your pages could load, and give you optimized versions to download.
- 50 pagesmenu pages first
- Seconds savedmeasured, not guessed
- WebP · AVIFready to upload
- ZIPall images at once
Images to replace, biggest win first
Drop images here or choose files
JPEG, PNG, WebP or AVIF · up to 50 images at a time · you can also paste
The scan reads your public pages and images the same way a browser does. Nothing is stored. Images are converted on your device, and metadata (EXIF, XMP, IPTC, GPS) is always removed. BETA
Which format?
Pick the right format for the web
WebP
The safe default. Usually much smaller than JPEG or PNG at the same visual quality, and it keeps transparency.
Works in about 97% of browsers in use (caniuse).
AVIF
Often the smallest file. It takes a few seconds per image to create, and the encoder (about 1.1 MB) downloads once the first time you choose it.
Works in about 96% of browsers in use (caniuse).
JPEG · PNG
Use JPEG where a system only accepts the classic formats. Use PNG for screenshots, logos and graphics that need sharp edges and no quality loss.
FAQ
Questions
Is it really free?
Yes. There is no charge and no account.
How does the website scan work?
We read your home page, then follow the links in your header and footer menus first, then other links, up to 50 pages. We list every image on those pages, then your browser downloads each large image, converts it to WebP (or AVIF) at a sensible size, and measures the real difference. GIF and SVG files are not checked.
How do you work out the time saved?
For each page, we add up how many bytes its images would lose and work out how long those bytes take to download at 1.6 Mbps. That is the mobile speed Google's Lighthouse uses for its page speed tests (Lighthouse throttling). It is an estimate: real visits differ with the connection, caching and lazy loading.
How do I use the new images?
Download them one by one or as a ZIP. The ZIP includes a list that matches each new file to the image it replaces. Upload the new files to your website and swap them in where the old ones are used. Each file keeps its original name with the new format's extension.
Is my data stored?
No. Our server reads your public pages and images the same way a browser does and passes them straight to your browser. Nothing is saved. Files you optimize yourself never leave your device. When you choose AVIF, or WebP in Safari, your browser downloads an encoder program once from jsDelivr, a public code network.
What does removing EXIF data remove?
Everything stored inside the file besides the picture itself: GPS location, camera make, model and serial number, the date taken, editing software notes, XMP and IPTC data, and any copyright notice saved in the file. The color profile is converted to standard sRGB, which is what the web uses.
What size should images be for a website?
Rarely wider than the space they fill. 1920 px wide suits full-width hero images, 1200 px suits blog and content images, and 400 to 800 px suits thumbnails and cards. When a page says how wide an image is shown, the scan sizes it at twice that width so it stays sharp on high-resolution screens.
Does it work on a phone?
It is built to run in current mobile browsers. A scan downloads and converts many images, so a computer is faster. The tool is in beta: if something does not work on your device, try a desktop browser.