JPEG or PNG? Why is it important to use image formats

JPEG or PNG? Why is it important to use image formats

Dec 29, 2021, 5:00:09 AM Opinion

You need to select the best image format when you save images to be used on your site.


The incorrect image format results in larger file size . This means that your website will be slower . Higher bounce rates can translate into lower conversion rate.

Spend a few minutes with me and you won't repeat that error. Instead, choose the right format of image and your site will load faster and look better.

Let's start with basics:

What are JPGs (or JPEGs)?

JPG is an uncompressed file format. JPEG can be thought of as a compressed image that reduces detail and tries to reduce file size. While the file could be reduced to just a pixelated mess to decrease the size of the file, it wouldn't be a pleasing end result. JPEG attempts to compromise by reducing the file size and maintaining high image quality. JPEGs are now the standard compression format for images.

JPG or JPEG is for Joint Photographic Experts Group, which is named after an organization that established the standard.

Although technically, the abbreviation should be 'JPEG'. In practice, however, this is interchangeable with 'JPG. This abbreviated stems in part from the fact, that filename extensions are now limited to 3 characters on Windows. The filename on Windows was '.jpg, while it was on Mac '.jpeg.

What does a PNG mean?

PNG stands for Portable Graphics Format. It's the most common image format that supports lossless compression. It's great for line drawings, text and iconic graphics.

What is the difference between JPG vs ? Which provides better quality images to your website?

The Basic Rule: JPEG is for photos, PNG is for graphics

If you only remember one thing about this post, it's this: Save your images as JPEG, and your graphics (and screen shots) as PNG.

JPEG should be used for images that contain many colors, gradients, or textures. PNG works best for objects with straight lines, text and areas that are clearly distinct from flat colors.

But what is the point?

If you compare images in JPG to PNG side-by side, it is likely that you won't be capable of telling the difference. If there isn't any discernible difference between images, save them all as JPEG and move on.

Image Compression is the answer.

Image compression is about compressing an image to reduce its file size without sacrificing quality. The rule of thumb is that a greater compression ratio means a smaller file size, which in turn results in poorer image quality. A good compromise between file size, quality, and image compression is what makes image compression work.

It's all very nice to see a high-resolution image on your computer. Because the file is not compressed, you can open it immediately. However large files may take several seconds to load on slow connections. When it comes to website speed, conversion rates, and other factors, there is not much time left.

The graph above shows how people abandon websites after just a few seconds. This means that half of your visitors might abandon your site if there are too many large files on a page.

Let's see an example. Here's the result of saving a photo such as this at 1080p resolution both in image formats.

Although the image quality is identical, the wrong format (PNG in this instance) can double the file's size.

But that's not all. Even the smaller image in this comparison is over 1MB too large to be used online. These images aren't compressed. You shouldn't use uncompressed images in a website.

Your bounce rate will skyrocket if your pages are loaded with many large, uncompressed photos. This is a problem that has plagued many websites we've reviewed over years 

JPEG, PNG Image Compression

Images should be compressed to make the differences between JPEG/PNG clearer.

JPEG employs a method to compress multiple similar pixels, blurring the lines between them. This works great for photos, but is horrible for graphics and screenshots.

What about webp?

Apart from JPEG and PNG there are several other image formats like GIF, BMP or TIFF. You can also png convert jpg..

They are often worse than JPEG, PNG for web use. It is not worth addressing them in detail (at the very least, not within the scope of this article).

webp , a particular image format that you should keep an eye on, is . This image format was created for the web, and it has very small file sizes. Webp files often have a smaller file size than JPEG or PNG, but maintain high quality images. Webp is supported well in web browsers. It is not yet widely used in image editing software.

It's all about you

Now, you're equipped with the knowledge to choose the correct image format. This will ensure that your website is beautiful and quick.

Leave a comment below if there are any questions you have or feedback!

Published by hazelclare

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