Resize images by width and height while keeping aspect ratio intact. Instantly preview resized images and download in high quality. Supports JPG, PNG, and WebP.
Specific platforms, design tools, and print specifications require exact image dimensions - social profile photos, cover images, post thumbnails, and ecommerce product images all have their own size rules. This tool covers both ways people approach that problem: typing the exact pixel size a platform requires, or quickly scaling an image down by a rough percentage.
The tool re-encodes JPG, WebP, and other non-PNG uploads as JPEG at a fixed 92% quality; a PNG upload stays PNG. Everything runs in your browser.
This image resizer changes an image's pixel dimensions two ways: type an exact width and height (with an aspect-ratio lock that calculates the other dimension for you), or drag a percentage slider from 25% to 150% for quick scaling. Downscaling keeps quality intact; enlarging past the original size can't add detail and will look softer.
Upload a JPG, PNG, or WebP image you want to resize.
Enter custom width and height or resize while locking aspect ratio.
Instantly preview the resized image alongside the original.
Download the resized image in your desired dimensions.
Type a target width and height, with aspect lock on, to hit a platform or theme's exact size requirement.
Drag the percentage slider (25%-150%) for a rough resize without calculating exact pixels.
Reducing an image's size preserves quality - this is the resize direction with no real downside.
If you need the output to stay WebP, convert with PNG to WebP or JPG to WebP after resizing, since this tool always outputs JPEG for non-PNG sources.
Run the resized image through the Image Compressor if it also needs a smaller file size.
Best For
Source & Settings
photo.jpg - 4000x3000, target set to 1280x960 with aspect lock onResult
photo_resized.jpg - exactly 1280x960, re-encoded at 92% qualityDownscaling like this preserves quality well. The tool's own interface notes that enlarging an image past its original size can't add detail and will look softer - a real, verified limitation of any resizing method, not unique to this tool.
Type the exact width and height a social platform, theme, or marketplace requires, with aspect lock on to avoid distortion.
Use the percentage slider for a rough resize when you don't have an exact target pixel size in mind.
Reduce a camera-resolution photo's dimensions before using it on a website, where large pixel dimensions slow page loads.
Problem
Solution
Resizing above 100% - whether by percentage or by typing larger dimensions - can't add detail that wasn't in the original. The tool's own interface warns about this: downscaling gives the best results.
Problem
Solution
Only PNG uploads stay PNG. Every other format, including WebP, is re-encoded as JPEG. The downloaded filename may still show your original extension, but the file's actual content is JPEG.
Problem
Solution
This tool only works in pixels or percentage - there's no option for centimeters, inches, or a DPI setting for print-specific sizing.
Problem
Solution
This tool controls pixel dimensions, not file size. Resize here, then use the Image Compressor if you also need to hit a specific file size.
If you have a choice of source images, start from the largest one available - shrinking preserves quality, but there's no way to recover detail when enlarging.
When you don't need an exact pixel target, the percentage slider is faster than calculating and typing dimensions.
With aspect lock on, changing one dimension automatically adjusts the other to avoid stretching or squashing the image.
Resizing changes pixel dimensions, not compression level - run the result through the Image Compressor for a smaller file size.
Only pixel dimensions and percentage scaling are available - there's no cm/inch/DPI mode and no option to resize to a specific file size like 200KB.
A WebP, GIF, or other non-PNG upload is re-encoded as JPEG at a fixed 92% quality. Only PNG uploads stay PNG.
The tool allows resizing up to 150% by percentage, or larger by typing dimensions manually, but enlarging can't add detail - the result will look softer than the original.
This page resizes a single image per run - there's no batch or bulk resize option.
Resizing changes the whole image's scale; cropping cuts away part of it instead.
| Image Resizer (this tool) | Image Cropper | |
|---|---|---|
| What changes | Pixel dimensions - the whole image scales up or down | What's kept - part of the image is cut away at its original scale |
| Exact pixel control | Yes - type an exact width and height | No - only Free drag or fixed 1:1/4:3/16:9 ratios |
| Best for | Hitting an exact required width and height | Removing unwanted parts or matching a shape or ratio |
Which should you use?
Use the Resizer when the whole image needs to change size. Use the Cropper when you need to cut away part of the image instead - and combine both if you need an exact pixel size that a crop's fixed ratios don't produce directly.
Image resizer visitors usually come with a specific target size in mind - a platform requirement or a rough scaling job. The FAQ below covers both resize modes, what happens when enlarging, and what format the download comes back as.
Yes. Switch to Percentage mode and drag the slider from 25% to 150% for a quick resize without calculating exact pixel numbers. Dimensions mode is still available if you need an exact width and height.
Yes. Resizing above 100% - by percentage or by typing larger dimensions - can't add detail that wasn't in the original image, so the result looks softer. Downscaling gives the best results; this is a general limitation of resizing, not specific to this tool.
No. Only PNG uploads stay PNG - every other format, including WebP, is re-encoded as JPEG at a fixed 92% quality. The downloaded filename may still show your original extension, but the file's actual content is JPEG.
No. This tool controls pixel dimensions and percentage scaling only - there's no option to target an exact file size. Use the Image Compressor after resizing if you also need to hit a specific KB target.
Yes. CoditTools resizes the image entirely in your browser using JavaScript. Your file is never uploaded to any server.
No, this page resizes one image at a time - there's no batch or bulk resize option.
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