Image Resizer
Resize images by pixel dimensions while keeping the aspect ratio when you need it.
Upload images
Your files stay on your device. Nothing is uploaded.
Supported formats
- Input: JPG/JPEG, PNG, and WebP
- Output: the source format, or JPG, PNG, or WebP
- Up to 20 images per batch
Limits and behavior
- Width and height are entered in pixels, from 1 to 10,000.
- Leave one dimension empty to keep the aspect ratio.
- With Keep aspect ratio on, the image fits inside the values you enter.
- Each image can be up to 30 MB.
- PNG and WebP keep transparency; JPG fills transparent areas with white.
Processed on your device
Your files are read and processed in this browser. Nothing is uploaded, stored, or sent to FileOne. Read the privacy policy
How to resize an image
- 01
Choose one or more images.
- 02
Enter width and/or height in pixels.
- 03
Resize and download the results.
Image resizing questions
Can I resize by width only?
Yes. Leave height empty and keep aspect ratio enabled.
How does Keep aspect ratio work?
When it is on, the output fits inside the width and height you enter without stretching the image. One dimension may be smaller than the value you typed.
Will resizing change the format?
Only if you choose a different output format. The default keeps the source format.
What is the maximum dimension?
Each side is capped at 10,000 pixels. Larger values are limited to that maximum.
Are my images uploaded?
No. Resizing runs in your browser.