A practical example
Resize a 4000 × 3000 photo to 1200 pixels wide
Enter 1200 for the width. The proportional result is 1200 × 900 pixels.
Image Resizer
Choose an image and enter the width you need.
Your work stays in this browser.
How to use the Image Resizer
Image Resizer changes the pixel dimensions of an image while preserving its original proportions. Enter the width you need and the height is calculated automatically, which prevents accidental stretching.
Choose an image
Upload a JPEG, PNG, or WebP file up to 25 MB.
Enter the new width
Use a value from 1 to 10,000 pixels. The tool keeps the original aspect ratio.
Resize and download
Create the new image, review the full before-and-after previews, and download the result.
What to know
- Making a small image much larger cannot restore detail that is not present in the original.
- PNG files remain PNG; other accepted files are saved as JPEG by this resizer.
Questions people ask
Do I need to calculate the new height?
No. The height is calculated from the original proportions.
Can I resize for a specific social platform?
Use the Social Media Image Resizer when you need a preset width, height, and framing option.