How to resize images
Choose how to resize
Set the longest side, a maximum width and height, or a percentage.
Add your images
JPG, PNG, WebP, HEIC or AVIF. All images in a batch get the same settings.
Download
JPG, PNG and WebP keep their format; HEIC and AVIF become JPG. Save one by one or as a ZIP.
Resized locally, in full quality
Your photos are scaled by your own device using a high-quality resampling filter. They are never uploaded, so even large batches of personal pictures stay private – and there's no waiting for uploads.
Choosing the right size
Pixel size and file size are related but not the same. A modern phone photo is about 4000 × 3000 pixels – far more than any screen shows. Reducing it to the size you actually need makes pages load faster, emails send faster and uploads go through.
Common sizes
| Use | Longest side |
|---|---|
| Full-screen on a laptop or desktop | 1920 px |
| Websites, blogs, email | 1280 px |
| Social networks | 1080 px |
| Thumbnails and previews | 400–800 px |
Three ways to set the size
- Longest side – the easiest option for mixed portrait and landscape photos: each one gets the same longest edge.
- Width and height – fits each image inside a box, without cropping or stretching.
- Percentage – scales everything by the same factor, for example 50%.
Still too many kilobytes after resizing? Compress the images as well, or set a fixed limit with compress to an exact size.
Learn more
Frequently asked questions
Does resizing also make the file smaller?
Yes. Halving the width and height leaves a quarter of the pixels, so the file usually shrinks to roughly a quarter as well.
Can I set an exact width and height?
The image is fitted inside the width and height you enter, keeping its proportions, so it is never stretched. One side matches your box exactly and the other is smaller if the shapes differ.
Can I make images bigger?
No. Enlarging adds pixels without adding detail and only makes files bigger, so KeepPixels never upscales. You'll see a note when an image is already smaller than your setting.
Which size should I use for the web or email?
1920 pixels on the long side looks sharp on most screens; 1280 is plenty for email and blog posts; 1080 matches many social networks.
Will the photo lose quality?
Downscaling uses a high-quality filter that keeps edges crisp. JPG and WebP are saved at quality 90 by default, which you can change.
Are my images uploaded?
No. Resizing happens entirely in your browser.