Image Resizer
Resize, rotate and flip images online. Adjust image size by percentage and save as JPG, PNG, GIF, BMP or WebP.
Resize Image
Resize Images Online
Rubic8's free Image Resizer makes it easy to resize images online without installing image editing software. Upload an image from your device or load one from a remote URL, adjust its size and orientation, and download the result in your preferred image format.
You can resize an image by percentage, choose an aspect ratio, rotate or flip the image, and save the result as JPG, PNG, GIF, BMP or WebP.
How to Resize an Image Online
- Upload an image from your device or enter a remote image URL.
- Adjust the image orientation or aspect ratio if needed.
- Choose how much you want to resize the image.
- Check the starting and final image dimensions.
- Select JPG, PNG, GIF, BMP or WebP as the output format.
- Click Resize Image Now and download the resized image.
Resize an Image by Percentage
Resizing by percentage is a convenient way to make an image larger or smaller relative to its original dimensions. The Image Resizer displays both the starting size and the resulting size so you can see the dimensions before creating the final image.
For example, reducing an image proportionally can make its dimensions more suitable for websites, blog posts, documents, email or social media.
Choose an Image Aspect Ratio
Aspect ratio describes the relationship between an image's width and height. Rubic8 provides several common aspect ratio options:
- 16:9 – commonly used for widescreen content and video thumbnails
- 4:3 – a traditional photo and display ratio
- 1:1 – a square image
- 2:3 – commonly used for portrait-oriented images
- Freeform – adjust the image without a fixed aspect ratio
Choosing an appropriate aspect ratio can help prepare an image for different layouts and publishing requirements.
Rotate and Flip Images
In addition to resizing, you can adjust the orientation of your image before downloading it. The tool allows you to:
- Flip an image horizontally
- Flip an image vertically
- Rotate an image clockwise
- Rotate an image counterclockwise
These controls are useful when an image has the wrong orientation or needs a quick adjustment before being published.
Supported Output Image Formats
After resizing your image, you can save the result in one of the following formats:
- JPG
- PNG
- GIF
- BMP
- WebP
If your main goal is to change an image from one format to another, try the Image Converter.
Image Dimensions vs. File Size
Image dimensions and file size are not the same thing. Image dimensions describe the width and height of an image, usually measured in pixels. File size describes how much storage space the image uses.
Reducing image dimensions can often result in a smaller file, but the final file size also depends on the image format, compression and image content.
Why Resize an Image?
Photos and other images are often larger than necessary for their intended use. Resizing can help prepare images for websites, social media, email, documents and other online applications.
Common reasons to resize an image include:
- Preparing images for websites and blog posts
- Creating thumbnails and preview images
- Adjusting images for social media layouts
- Preparing profile or account images
- Reducing unnecessarily large image dimensions
- Creating images with a particular aspect ratio
Does Resizing an Image Reduce Quality?
Resizing changes the pixel dimensions of an image. Making an image smaller usually produces good visual results, although the image data is still being resampled.
Enlarging an image significantly beyond its original dimensions can make it appear softer or pixelated because the original image does not contain the additional detail required at the larger size.
For the best results, start with a good-quality source image and avoid unnecessary enlargement.
Resize vs. Crop an Image
Resizing and cropping serve different purposes. Resizing changes the dimensions of an image, while cropping removes part of the image to change its composition or framing.
If you specifically need to remove unwanted areas from an image, use Rubic8's Image Cropper.
Resize vs. Convert an Image
Resizing primarily changes image dimensions. Image conversion changes the file format, such as converting an image to JPG, PNG or WebP.
Rubic8's Image Resizer also lets you select an output format when creating the resized image. For dedicated format conversion, use the Image Converter.
Frequently Asked Questions
Can I resize an image online for free?
Yes. Rubic8's Image Resizer lets you resize images online directly from your web browser.
Can I resize an image from a URL?
Yes. You can upload an image from your device or provide a remote image URL.
What image formats can I save?
The Image Resizer provides JPG, PNG, GIF, BMP and WebP as output format options.
Can I change the aspect ratio?
Yes. You can choose 16:9, 4:3, 1:1 or 2:3, or select Freeform when you do not want to use one of the predefined ratios.
Can I rotate an image?
Yes. The tool provides clockwise and counterclockwise rotation controls as well as horizontal and vertical flipping.
Will resizing make an image file smaller?
Reducing image dimensions can often reduce the resulting file size, but file size also depends on the image format, compression and image content.
Can I make a small image larger?
You can increase an image's dimensions, but substantial enlargement may make the result appear softer or pixelated.
Resize Your Image
Upload an image from your device or enter a remote image URL, choose your resize settings and output format, then create and download your resized image with Rubic8.
Rubic8 Editorial Team
Editorial Team
Rubic8 creates practical guides and free tools for developers, webmasters, and digital publishers. Our fast-changing technical content is reviewed against current primary documentation before publication.
