Select an image
Upload a JPG, PNG or WebP image from your device. You can also drag it into the upload area.
Free tool
Free Online Image Resizer
Change the width and height of JPG, PNG and WebP images, preserve the original aspect ratio and download the result without uploading files to a server.
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Upload an image
Drag an image here or select a file from your device.
Supported formats: JPG, PNG and WebP.
Maximum size: 20 MB.
How to use the tool
How to resize an image online
This editor lets you change the width and height of JPG, PNG and WebP images directly in your browser. You do not need to install software or upload the file to a server.
Choose the resize method
Enter new dimensions in pixels or resize the image using a percentage.
Preserve the aspect ratio
Enable the preserve aspect ratio option to prevent the image from becoming stretched or distorted.
Choose the output format
Select JPG, PNG or WebP and adjust the quality when available.
Download the result
Process the image and download the resized file directly from your browser.
What does resizing an image mean?
Resizing an image means changing the number of pixels that make up its width and height.
For example, a 4000 × 3000 pixel image can be reduced to 1200 × 900 pixels to use less storage and load faster on a website.
You can also increase the dimensions, although enlarging an image too much may reduce sharpness because the browser has to generate new pixels from the available information.
Why preserve the aspect ratio?
The aspect ratio describes the relationship between the original width and height.
When only one dimension is changed without adjusting the other proportionally, the image may become stretched horizontally or vertically.
The preserve aspect ratio option automatically calculates the second dimension to keep the original shape.
Differences between JPG, PNG and WebP
Choose the format based on the image, transparency and final file size you need.
JPG
Useful for photographs and smaller files. It does not support transparency.
PNG
Preserves transparency and is often suitable for logos, screenshots, graphics and images with sharp edges.
WebP
Provides good quality with generally smaller files and is suitable for modern websites.
Common uses for an image resizer
- Preparing images for a website.
- Reducing photos before sending them by email.
- Adapting images for social media.
- Creating thumbnails.
- Resizing ecommerce product images.
- Reducing file size before uploading.
- Preparing images for documents or presentations.
- Converting images to WebP for better performance.
Privacy
The image is processed locally
Processing is performed using browser features. The file is not sent to SG Hub or stored on a server.
Related tools
You can also convert images between JPG, PNG and WebP using the image format converter.
Open image converter →Limitations
The result depends on the quality and resolution of the original image.
Increasing dimensions cannot recover details that do not exist in the original file.
Extremely large images may exceed browser memory or canvas limits.
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