Image editing
How to Resize an Image for Uploads, Thumbnails, and Web Pages
A simple guide to image dimensions, aspect ratio, thumbnails, and exact pixel resizing for common online workflows.
Image Resizer
Resize images by pixel width and height, then export locally.
Know the target size
Before resizing, check where the image will appear. A website hero, profile avatar, marketplace product image, and email attachment all need different dimensions.
If a platform gives exact pixel requirements, use those values. If it only gives a file size limit, resize the longest side first and then compress if needed.
Keep aspect ratio when possible
Locking the aspect ratio prevents distortion. It keeps faces, logos, product photos, and screenshots from looking stretched.
Unlock the ratio only when the final design requires an exact width and height. In those cases, cropping may look better than stretching.
Resize, then review
After resizing, open the exported file and check sharpness. Very small images can look pixelated, while oversized images slow down pages and uploads.
For web pages, resizing and compression usually work together: resize to the display size, then compress to reduce final file weight.
FAQ
What is aspect ratio?
Aspect ratio is the relationship between width and height. Keeping it locked prevents the image from stretching.
Should I resize or crop?
Resize when you want the whole image smaller. Crop when you need a specific shape or want to remove unwanted edges.
Does resizing reduce file size?
Usually yes, especially when reducing a very large image. Compression can reduce it further.