SmartTools Image Tools
Image Resizer
Resize images to your required pixel dimensions. Keep the original proportions or set a custom width and height.
📏
Custom dimensions
Set your required width and height in pixels.
🔗
Aspect ratio
Keep proportions or choose custom dimensions.
📥
Instant download
Save the resized image to your device.
Images are resized in your browser. Maximum output dimensions are limited to 12000 × 12000 pixels and 40 megapixels to help prevent excessive browser memory use.
Resize Images Online for Free
Need to change the dimensions of a photo? SmartTools Image Resizer lets you resize JPG, PNG and WebP images by entering your preferred width and height in pixels. You can maintain the original aspect ratio or turn it off to set custom dimensions.
Choose an output format and adjust image quality for JPG and WebP files. Your resized image is generated in your browser and can be downloaded to your device.
How to Resize an Image
- Click Choose Image and select a JPG, PNG or WebP file.
- Enter your required width and height in pixels.
- Keep the aspect ratio enabled to preserve the original proportions, or disable it for custom dimensions.
- Select JPG, PNG or WebP as the output format.
- Adjust quality if you selected JPG or WebP.
- Click Resize Image and download the result.
Image Resizer Features
Custom pixel dimensions
Enter the exact width and height you need, up to the supported dimension limits.
Maintain aspect ratio
Automatically calculate the other dimension when you change width or height.
Multiple image formats
Export resized images in JPG, PNG or WebP format.
Browser-based resizing
Image resizing is performed in your browser without sending the image to a SmartTools upload server.
Frequently Asked Questions
Is this image resizer free?
Yes. You can use the SmartTools Image Resizer to change image dimensions and download the resized result.
Which image formats are supported?
You can upload JPG, PNG and WebP images. You can also choose one of these three formats for the output.
Can I resize an image without stretching it?
Yes. Keep the original aspect ratio option enabled. Changing the width or height will automatically calculate the other dimension.
Can I enter custom image dimensions?
Yes. You can enter your own width and height in pixels. You can disable the aspect ratio option when you need independent dimensions.
Is my image uploaded to a server?
The resizing operation runs in your browser. This tool does not send your selected image to a SmartTools upload server.
What is the maximum image size?
The upload limit is 25 MB. Output dimensions can be up to 12000 pixels per side, subject to a 40-megapixel limit.
Explore More SmartTools
Explore other PDF and image tools to prepare, convert and edit your files.