How to Resize Images Online: The Free No-Software Guide
Learn how to resize images to exact pixel dimensions for free. Resize JPG, PNG, and WebP images in your browser — no uploads, no Photoshop needed.
Whether you need to match a website's required dimensions, hit a social media platform's image size spec, or reduce a photo's file size, resizing images is a daily task. This guide shows you how to resize images for free, directly in your browser.
What is image resizing?
Image resizing changes the pixel dimensions of an image — making it larger or smaller. You can specify an exact width and height, or constrain proportions by specifying only one dimension.
How to resize images with ProUtils
- 1Go to the Image Resizer tool.
- 2Upload your image by dragging and dropping or clicking to browse.
- 3Enter the desired width and/or height in pixels.
- 4Toggle "Keep aspect ratio" on or off as needed.
- 5Download the resized image.
Common use cases for resizing images
- •Resize a photo to fit a website banner or thumbnail slot
- •Match social media recommended sizes (Instagram 1080×1080, Twitter header 1500×500)
- •Reduce file size to meet email attachment or upload limits
- •Create app icons or favicons at exact required dimensions
- •Prepare images for printing at a specific size
Important things to know
Always maintain aspect ratio when possible
Resizing without maintaining the aspect ratio stretches or squishes the image. In most cases, enable "Keep aspect ratio" and specify only the width or height.
Upscaling causes quality loss
Enlarging an image beyond its original dimensions stretches pixels and causes blurriness. Resize images down whenever possible; upscaling should be a last resort.
Frequently asked questions
Is the image resizer free?
Yes. The ProUtils Image Resizer is completely free with no account required.
Is my image uploaded to a server?
No. All processing happens in your browser. Your images never leave your device.
Which image formats are supported?
JPG, PNG, and WebP are supported. The output format matches the input, but you can also choose to export as JPG or PNG.
Need to resize an image? Try the ProUtils Image Resizer now — free, instant, no sign-up.