Does resizing reduce image quality?

Downscaling (making an image smaller) has minimal quality impact and often looks excellent. Upscaling (enlarging) uses bilinear interpolation which can look soft or pixelated for significant enlargements — typically anything beyond 150% of the original. For best results, always work from the highest-resolution original.

What is aspect ratio and why does it matter?

Aspect ratio is the proportional relationship between width and height. A 1920×1080 image has a 16:9 aspect ratio. If you change width to 960 and height stays 1080, the image will be stretched and distorted. Enabling aspect lock maintains the original proportions automatically.

Can I resize transparent PNG images?

Yes. PNG images with alpha channel transparency are fully supported. The transparent areas are preserved after resizing. If you resize a PNG with transparency, the output PNG also retains transparency.

What is the maximum size I can upscale to?

There is no fixed limit, but browser memory constraints apply for very large images. Upscaling a 1 MP image to 100 MP would require significant memory and may fail on low-memory devices. For extreme upscaling, consider AI super-resolution tools which add realistic detail rather than just interpolating pixels.

How is resizing different from cropping?

Resizing changes the dimensions of the entire image by stretching or shrinking it. Cropping cuts out a rectangular portion of the image and discards the rest, keeping the content at original pixel density. Use resize when you need specific output dimensions; use crop when you want to remove parts of the frame. We have a separate crop tool on this site.

Resize Image — Set Exact Dimensions or Scale by Percentage

Resize any image to exact pixel dimensions or scale it to a percentage of the original. Enter width and height in pixels with aspect ratio lock, or drag a percentage slider to scale proportionally. The output matches your input format — resize a JPEG and download a JPEG. Processing runs entirely in your browser; files never leave your device.

Drop an image here

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JPEG, PNG, WebP, AVIF and more

How to use this tool

Upload your image
Drop any JPEG, PNG, WebP, AVIF, or other common image format. The original dimensions are shown automatically.
Choose resize mode
Switch between "Pixels" to enter exact dimensions or "Percentage" to scale proportionally. In pixel mode, enabling aspect lock adjusts height automatically when you change width.
Set dimensions
Enter your target width and height in pixels, or drag the percentage slider from 1% to 200%. The output dimensions update in real time.
Resize and download
Click Resize Image to process. The result previews immediately. Click Download to save the resized file.

Frequently asked questions

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Resize Image — Set Exact Dimensions or Scale by Percentage

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