Best for changing image dimensions
Use Resize Image when an image needs an exact width, height, thumbnail size, profile-photo size, or smaller pixel dimensions.
Files are uploaded to our server, processed in memory, and automatically deleted after your download is ready. We never store, index, or share your documents.
About Resize Image
Need a profile picture at exactly 400x400? A thumbnail for a marketplace? A screenshot scaled down for a README? Enter the dimensions, upload the image, and it's done. If you only set a width or only a height, the aspect ratio is preserved automatically so your photos never come out squished. You can also swap the output format in the same step - resize a large PNG and save it as a smaller JPG, for example. Batch mode handles up to 20 images at once, all delivered in a ZIP. Your files are deleted the moment the download is ready.
Resize Image details
Width, height, and aspect ratio
Enter only width or only height to keep the original aspect ratio. Enter both width and height to force the image to the exact dimensions.
Output format options
Resized images can be written as JPG, PNG, or WebP, or Automatic can keep a suitable format based on the original filename.
Quality after resizing
Downscaling uses high-quality resampling. Upscaling small images can look softer because no resizer can recreate missing detail.
Limits and privacy
Batch resizing supports up to 20 images within the upload limit. Images are processed server-side in memory and are not kept after download.
Common resize errors
Resize fails if both dimensions are empty, the image cannot be decoded, or the file is over the 40 megapixel processing guard.
How it works
1
Upload your images
Drop in the JPG, PNG, WebP, or HEIC files you want to resize.
2
Enter the new size
Set a width, a height, or both - entering just one keeps the aspect ratio automatically.
3
Download
Grab your resized images instantly - in a ZIP for multiple files.
Frequently asked questions
Will my image look stretched?
No. Enter just one dimension and the other is calculated automatically to keep the proportions. Only if you set both will the image be forced to those exact dimensions.
Which image formats are supported?
JPG, PNG, WebP, and HEIC as input; JPG, PNG, or WebP as output.
Can I resize multiple images at once?
Yes - upload up to 20 images and they're all resized to the same dimensions, delivered in a ZIP.
Is there quality loss when resizing?
Downscaling uses high-quality resampling and looks visually identical. Upscaling a small image can look soft - that's a natural limitation of any resizer.