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Free online image resizer

Resize images by percentage, target width, or exact dimensions. Create the right size for every layout, preserve aspect ratio when you need it, and download the result without uploading your file.

Batch supported Aspect ratio control No account needed

Resize your images

Upload images, choose a resizing mode, set the target size, and download the new files.

Drop images here or click to browse JPG, PNG, WebP, GIF, AVIF, and BMP files are accepted when your browser can read them.
50% halves the width and height
85%
No images selected yet.

Why image dimensions matter

Serving an image that is larger than its display size wastes bandwidth and slows down the page. A 4000-pixel-wide photo shown in a 700-pixel-wide content column downloads far more data than necessary. Resizing before upload fixes the source of that waste, and it is more effective than relying on CSS alone because the browser still downloads the full original file.

Recommended dimensions for common layouts

Placement Recommended width Why it works
Full-width hero section 1920 px Matches large desktop screens with room for retina devices.
Blog featured image 1200 px Sharp on most content areas while keeping files small.
Article inline image 800 px Covers the typical content column at high pixel density.
Product thumbnail 300-600 px Small enough for grids and fast browsing.
Email banner 600-800 px Safe for desktop clients and mobile-friendly.

Retina displays and pixel density

Retina and high-density screens show more detail than standard displays. A common approach is to prepare an image at 1.5x or 2x the layout width and use HTML responsive attributes such as srcset and sizes so the browser chooses the right file for the screen. Resizing in advance gives you clean files at each breakpoint.

Workflow tip: Resize first, then compress. Smaller dimensions reduce the amount of detail that needs to be encoded, so a compressed resized image is often dramatically smaller than a compressed original-sized image.

Frequently asked questions

Does resizing an image reduce quality?

Resizing reduces the number of pixels, but the remaining image can still look sharp at its new display size. Quality is affected more by aggressive compression than by sensible downscaling.

Can I resize many images at once?

Yes. The resizer processes every selected file with the same mode and target size, which is useful for product catalogs, galleries, and WordPress media libraries.

What is the best file size after resizing?

There is no universal number, but a good target for a 1200-pixel-wide web image is under 200 KB for photography and under 100 KB for simpler graphics.

Related tools

After resizing, compress the image for the smallest possible file, convert it to WebP for modern browsers, or crop it to a precise layout ratio.