Image Resizer
Upload any image and set the exact pixel width and/or height you need. Leave one side blank and the tool keeps the original proportions automatically. Download the resized image as JPEG or PNG. Everything is processed on your device — nothing is uploaded.
Your files never leave your device. All processing happens on your device. No uploads, ever.
How to use Image Resizer
- 1
Upload an image
Choose a picture from your device.
- 2
Set dimensions
Enter the pixel width and/or height you need.
- 3
Choose the format
Pick JPEG or PNG output.
- 4
Download
Save the resized image locally.
Exact pixels, instant results
Enter the target width and height in pixels. The image is decoded, resized once and encoded locally, so results are accurate and fast.
Automatic aspect ratio
Provide only the width or only the height and the other dimension is computed from the original proportions — no distortion, no manual math.
JPEG or PNG output
Pick JPEG for a smaller file size or PNG for a lossless result. Web images for social media often need exact dimensions and a compact size.
Frequently asked questions
Does resizing work offline?
Yes. The image never leaves your device — it is decoded, resized and encoded entirely in your browser.
What happens if I only enter one dimension?
The missing side is calculated to preserve the original aspect ratio, so the image is never distorted.
Which formats can I upload and download?
Any browser-decoded image can be uploaded; output is JPEG or PNG at your chosen dimensions.
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Last updated 7 August 2026