Make images smaller for a website, a slide deck or an upload limit: resize, recompress and convert to WebP in the browser.
Open the Image Optimizer See all classroom tools
Free. This link opens the tool straight away, with no sign-up.
How it works
- Drop in one or more JPG, PNG or WebP images.
- Choose the output, WebP (smallest), JPEG or PNG (lossless), a maximum width (1600 pixels to start) and the quality (80% to start).
- Each image shows its size before and after. Download one at a time, or press Download all.
Ways to use it
- Shrink photos before uploading them to a school website or learning platform.
- Make slides with many photos lighter to send.
- Convert a folder of screenshots to WebP for a web page.
Good to know
- Images are processed in your browser and never uploaded. Anonymous usage counts go to Plausible analytics.
- Images are never enlarged: only images wider than the maximum are scaled down.
- Download all saves separate files, not a zip.
- It needs only www.abcwebsites.online.
Frequently asked questions
Is the Image Optimizer free?
Yes. It is marked Free in the ABC toolbox, and this link opens it in your browser with no sign-up.
Are my images uploaded?
No. They are resized and recompressed in your browser.
Which format should I choose?
WebP gives the smallest files for the web, JPEG suits photos everywhere and PNG keeps every pixel.
Can it make an image bigger?
No. It only scales down images wider than the maximum width you set.
Related tools
- Favicon Generator: every favicon size from one image
- PDF Toolkit: merge, compress and sign PDFs in the browser
- QR Code Maker: QR codes with your logo
More: all classroom tools · guides · getting tools past the school filter