How to resize an image

Why should you resize an image in the first place?

resize an image

Many websites allow you to upload images of up to 5Mb. Right? No, wrong.

While on the face it, it does appear that you are getting a big file uploaded, many sites have an automatic file re-sizer hidden in the upload process. There are reasons why they do this.


Bandwidth is important for websites as each time a picture is viewed on the net the websites hosting resources are used. Large files use more resources so hosting costs go up, profit goes down.

Page Speed

Put quite simply, larger files take longer to load in a browser window. If the image takes to long to load then the audience gets bored and goes away. Page loading times are monitored by Google, Bing, Yahoo et al. Slow page loading times can affect rankings.

There are more reasons but the main focus here is how to resize an image, right? Well, let’s get down to it.

Let’s say you have taken a photo of your artwork with DSLR. Most cameras these days produce images of big proportions. Even if it’s a Jpeg, not in raw image format. If you use photoshop or any other proprietary program you will find image resize or image scale options which are dead easy to use. So I am going to assume that you have no photo manipulation software on your computer. And no, you do not need to buy one. The benchmark amongst the free software out there is one named Gimp. Weird name but hey it is pretty much a free Photoshop. So if you do not have Gimp download it here. I promise it is absolutely free software.

Once you have downloaded and installed Gimp open an image from your PC, card reader or USB camera connection.


Firstly crop the photo to get rid of any extraneous stuff, after all, you want the photo to be the prime object. In the toolbox on the left select the scalpel blade, it should be in the middle column 5 rows down. There will be a tool tip pop-up that tells you it is the crop tool. Position the cross in the top left corner of the area you want to keep and drag across and down to select the area to keep. Hovering the mouse around the inside edge of the area will give you a little pointer. If you left click there you can adjust the size of the area if you released the mouse too early.

Hit the enter key and voila. A cropped image.

Image resize option

Now click on the file menu and select “export as”. Choose the destination folder, then click the small + at the bottom left to choose the file type. We will pick Jpeg image. Then click on Export. You now get a pop-up with a slider for quality. To see the file size before you export simply tick put a tick in the checkbox and move the slider till your file size is within the limits required for uploading. Then click Export. Done.

I hope you have found this helpful in getting your images up on the web.

Oh, one more thing. Smaller files upload quicker too so there is less chance of the upload failing.

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