How to use Image Resizer
Resize a batch by width while keeping proportions.
- Choose images and enter a new width. Height is calculated automatically so the image is not stretched. Preview the dimensions before downloading.
- Process the selected files, then inspect the preview, dimensions or warnings.
- Download a new copy and check it before replacing or sharing the original.
How processing works
Output height = original height × requested width ÷ original width, rounded to whole pixels. The browser resamples pixels to the requested dimensions; it does not recover missing detail.
A quick example
A 2400 × 1600 photo resized to 1200 pixels wide becomes 1200 × 800.
Assumptions, edge cases & limits
- Enlarging an image adds interpolated pixels and can look soft.
- Pixel dimensions do not guarantee a physical print size or a target KB size.
- Upscaling cannot restore missing detail.
Questions about Image Resizer
How do I resize a photo without stretching it?
Enter only the new width. This tool calculates height from the source aspect ratio, so a 2400 × 1600 image becomes 1200 × 800 at a width of 1200 pixels.
Can resizing make an image exactly 50 KB?
No. Dimensions and encoded file size are different measurements. Resize first, then use Image Compressor to work toward a KB requirement and inspect readability.
Are my files or inputs uploaded?
Calculation and file processing run in your browser without a processing upload. Downloads go to your device. Choosing a next-step transfer creates a temporary local copy for that workflow. Region preferences are stored separately from tool inputs. See our privacy details.
Can I use this tool for free?
Yes. No signup, subscription or payment is required to use the tool or download its output. File tools have device and size limits; a smaller batch may work better on a phone.
A result or explanation needs correcting? Tell us the tool name and an example.