Resize Images in GIMP - Here are the Most Detailed Steps and Best Alternatives

Last Updated on December 17, 2023 by Peter Wood

In the world of digital image processing, resizing is a basic but crucial task. Whether you're resizing for web optimization, printing, or a creative project, mastering the art of image resizing is crucial. This guide dives into the most detailed steps for resizing images using GIMP. There are also some of the best alternatives available to suit every need. Whether you choose the power of GIMP or choose an alternative that fits your workflow, bravely embark on the journey to unlock the potential of resizing images.

Resize Images in GIMP

Part 1: How to Resize an Image in GIMP

GIMP stands for GNU Image Manipulation Program and is a powerful and free open-source raster graphics editor. GIMP provides a comprehensive set of image editing tools, including resizing. In GIMP, resizing an image involves adjusting its dimensions, whether to reduce the file size or to fit a specific size. GIMP provides precise control over image resizing, allowing you to maintain the aspect ratio and customize the dimensions to your requirements.

Step 1: Open GIMP, switch to the File tab, click the Open button in the menu that appears, and a window will pop up. Select the image that needs to be resized in the window and import it into the software.


Step 2: After the import is successful, you will be able to view it in the preview box of the software. After the file is successfully opened, click the Image button in the upper toolbar, and then select Scale Image in the menu that appears to summon the corresponding dialog box.

Step 3: Set the unit of the image to pixels. At this time, there is a chain icon between the Width and Height. Select it to ensure that the proportion of the image will not change when the image is modified.

GIMP Scale Image

Step 4: After the selection is successful, you can enter the corresponding value in Width or Height, and then click the Scale button, and the image will change immediately. You can also enter Resolution in X and Y to get better image quality.

Step 5: After the image resize is completed, you can click the Export As button in the File tab to summon the save dialog box. Select the export format you want and save the resized image to your computer.

Win Download Mac Download

Part 2: How to Resize Images Online for Free

Image Resizer refers to an online tool dedicated to resizing images, allowing you to upload an image and resize it or its file size. This allows you to quickly and easily resize images for a variety of purposes, including web publishing, social media, or reducing the file size of email attachments.

Step 1: Open your browser and enter to visit the official page of Image Resizer. Click the Select Image button on the page, select the image that needs to be resized in the pop-up dialog box, and import it into the software. You can also select files from Dropbox and Google Drive, or paste the URL of an image to upload to the website.

Image Resizer Online Select Image

Step 2: After the image is successfully uploaded, you will directly enter the image resize page. Select the By Dimensions tab, and then enter the corresponding values in Width and Height. If you select Lock Aspect Ratio at this time, you can resize the image without changing the image ratio.

Image Resizer Online Dimension

Step 3: Click the Resize Image button to start resizing the image. After the modification is completed, you will be able to see the comparison information before and after. Once confirmed, click the Download Image button to save the image to your computer.

Image Resizer Online Download Win Download Mac Download

Part 3: Best Alternative to Resize Image in GIMP

When using GIMP to resize images, you may already be aware of the complexity of the software. For novices, this operation is not so friendly, and when the number of images is large, it takes too long. At this time, you need simple and easy-to-operate software to replace GIMP and provide you with the function of resizing images. This software is WidsMob ImageConvert. WidsMob ImageConvert is a multi-functional software that can provide both image conversion and editing. It has many special functions to operate images.

1. Provide multiple modes to resize images.

2. The batch processing function can resize multiple images at the same time.

3. Support image conversion between different formats.

4. Allows quality adjustment during image export.

Win Download Mac Download

Step 1: Download WidsMob ImageConvert on your computer. After the download is complete, install the software. Start the software, click the Import button, select the image that needs to be resized in the pop-up window, and import it into the website. After the import is successful, you will be able to view it in the Library.

Import Photos to ImageConvert

Step 2: In the Library, you can view detailed information about the image, including Preview, Histogram, and Properties, which can better help you understand the image. You can also click the Add button to select more image import software. Double-click the image to enter the resize page of the JPG image.

Import ARW to ImageConvert

Step 3: When you need to resize the image size, you only need to click the Resize button in the toolbar on the right. In the pop-up drop-down menu, there will be a series of tools to help you resize the image. Click the Mode button, select By Width in the pop-up menu, and then enter the corresponding value, you can modify the size of the image.

Resize Image Batch ImageConvert

Step 4: After the modification is completed, the software also has many functions worth exploring. Border allows you to add borders to images to make the visual center more focused. Select the color of the border in Color, and then determine the width of the border in Width. At this time, you will be able to directly see the border in the image. Adjust the slider of Opacity to change the transparency of the border.

Add Photo Frame ImageConvert

Step 5: After all editing is completed, click the Save button to summon the image save dialog box. In the dialog box, select the storage location of the resized image, and adjust the slider of Quality to ensure the export quality of the image. Finally, just click the Export button to save the resized image to your device.

Export Photo Frame ImageConvert Win Download Mac Download

Part 4: FAQ to Resize Images

1What are some common mistakes to avoid when resizing in GIMP?
Common mistakes include ignoring the aspect ratio, using inappropriate resampling methods, and not considering the final use of the image. Always plan and preview your changes to avoid unexpected results.
2Is it possible to enlarge small images in GIMP without losing quality?
Enlarging an image usually results in some loss of quality. To minimize this, use the Scale Image option and choose the resampling method that best suits the image type.
3Can You batch resize-multiple images in GIMP?
GIMP does not have built-in batch processing capabilities, but you can use the "Export As" option to save multiple images with the same dimensions. Alternatively, a plugin or script can be used for batch resizing.


By the time we end this guide, you've discovered the intricacies of resizing images with GIMP, gaining a deeper understanding of the process in this versatile open-source software. Detailed steps are provided so you can complete the resizing process with confidence, unleashing your creative potential. Additionally, alternative tools are explored in the article to provide flexibility to users with different preferences and requirements. Whether you choose GIMP's full capabilities or choose an alternative that fits your workflow, resized images can be seamlessly integrated into your projects, reflecting your unique vision and creativity.

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