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JPG vs JPEG: Understanding the Most Common Image File Format

Website owners have to deal with images often. Although you don't need to be an expert on image files to edit or upload images to a website, you should familiarize yourself with the most common formats for files such as JPEG. Or is it JPG?

In this post, I'll show the JPG in a JPG vs JPEG comparison so that you can understand the distinctions, as well and other info that will help you upload the highest quality images possible to your website to provide the best user experience. If you're in search of an in-depth guide about the latest .webp file format we've got it covered too.

Ready? Let's get started!

Table of Contents

1. What is JPEG?
2. What is JPG?
3. JPG vs JPEG: Similarities Between the Two
4. JPG vs JPEG 2000
5. Convert Image Files to JPG: Common Methods

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As a website owner working using images, you've likely encountered that file-format JPEG somewhere in the process of editing and uploading.

But did you realize that the word JPEG could be actually used as a term used to refer for three different things?

It's true, and we're here to provide all of them:

1. JPEG Lossy Compression

When you upload images on your website be sure to make sure you don't impact your website's speed or performance by using huge images that consume resources and take forever to display on the frontend of your website. In fact, all website owners must optimize their images by reducing the file sizes of their images while preserving speeds of loading as well as user experience.

That's why JPEG comes in handy. JPEG is a lossy compression method used to ensure that digital images used are as tiny as is feasible and loaded quickly in the event that someone would like to see them.

Here are a few points to consider about lossy compression:

• The size of an image being compressed is permanently reduced by eliminating unnecessary ( redundant) informationfrom the image.
• Image quality isn't perfect although it's typically so subtle that the average user isn't able to tell.
• The compression process is where each pixel of the compressed image is compared to pixels surrounding it by a ratio ranging from 2:1 all the way to 100 times one ( any pixels that have the same characteristics as the original pixel are then eliminated in the event that they are found to be ineffective).
• JPEG lossy compression is often used to compress photographsand more complex still images.
• When you compress an image by lossy compression you will determine the file size and image Quality trade-off ( e.g., smaller files = lower image quality).
• As much editing and saving a single image you do the less quality of the image will be.

If you're adept at editing images using lossy compression, there's the chance that you could save the image's quality and reduce the size of its file. You can do this using RAW JPEG images editing, making changes, and save the image just once.

convert to BMP

If you're unwilling to perform JPEG lossy compression of your images on your website There's another option lossless compression.

Lossless compression saves your images in an entirely differently format ( usually PNG). Although image quality is not compromised because there is no information has been removed, keep in mind that with lossless compression the final sizes of images you download will be larger than that of lossy compression. This could cause slower page loading times.

2. Joint Photographic Experts Group (JPEG)

JPEG is the acronym for the Joint Photographic Experts Group, which is the name used to describe this sub-committee, which was instrumental in the development of the JPEG standard and other standards for still picture coding in the larger group called ISO.

The initial JPEG standard was released on the 22nd of December 1992 ISO ( International Organization for Standardization). ISO can be credited with preparing document that "...provide requirements, specifications, guidelines or other characteristics that can be employed consistently to make sure that the quality of products, materials processes and processes are suitable for purpose."

ISO establishes standards for all things that include digital images in the hope of providing consumers and customers with highest-quality products and solutions.

Image source: Wikimedia Commons

This international group is a open group of individuals with members from more than 164 nations which makes it the largest in the world for development of standards.

3. JPEG as a File Format

The other way JPEG can be used is when you're referring to a file format name or a method for storing and save digital images. This is the most likely way people are most familiar with JPEG because it's one of the formats for file options available when you store an image that you've altered.

JPEG file format

Here are some interesting facts about the .jpeg file format:

• Most widely used image file formats used in digital cameras and other devices for image capture.
• Colors are supported by 16,777,216. They are created by using eight bits of each in the RGB colour model.
• Displays more than 16 million colors at once which makes the color scheme and contrast nearly perfect.
• Supports a maximum size of 65.535 x 65.535 pixels.
• The size is reduced of an image by approximately 50-75% ( because of lossy compression) when the image is saved

Lastly, this type of file format isn't suitable for images with sharp edges because the colors blend in more than if the image was saved as a .png or.jpg, which show every single pixel as a blend.

So, let's find out what JPG is.

What is JPG?

What in the world is JPG as compared to JPEG?

Extensions for files in Windows

Well, when it comes to .jpeg or .jpg the truth is there is no difference between the twoexcept the amount of characters.

Crazy right? Let us explain.

The term JPG was created by the earlier version of Windows operating systems. Particularly, the MS-DOS 8.3 and FAT-16 file system included a maximum limit of 3 letters for names of files, whereas Unix-like operating systems such as Mac or Linux, which didn't have this limit.

That's why, on Mac or Linux systems images saved as JPEGs utilized the extension .jpeg. However, when saving the same kinds of images for Windows and Windows Media Player, the extension had to be reduced to .jpg to ensure that it doesn't exceed the 3-letter limit.

Today, Windows operating systems accept the 3- or 4-letter file extensions, such as .jpeg and .jpg. But since so many people use Windows for years, and are accustomed to saving their photos as JPGs, they haven't stopped. This is why applications for photo editing like Adobe Photoshop and GIMP save all JPEG images in default to the .jpg extension on the both Windows and Macs to avoid confusion.

JPG vs JPEG: Similarities Between the Two

You're aware what .jpeg and .jpg images are the same exactly. To bring that idea home and ensure you keep it in mind for the future, let's take a look at the similarities between JPEG in addition to JPG images.

1. Both Are Raster Images (Not Vector Images)

Computer images are created by raster images or vector images. And since JPEGs are raster images, so too are JPGs.

Graphics called bitmaps are images. A bitmap is a grid of tiny pixels that when put together make up an image. In terms of definition, raster pictures comprise of miniature squares ( or pixels) of color that are all coded in a certain shade or hue that when put together create a whole image that makes sense to look at.

Image source: PrintCNX

Here's more information on raster images that will assist you in understanding:

• Useful for non-lined images such as photographs, scanned artwork, or detailed graphics.
• They have subtle hue or shades, but very blurred lines and designs.
• Because of their basis in pixels, they are prone to problems with quality when blown in dimensions ( they become jagged and reveal the individual pixels).
• They are defined and displayed with a specific resolution. This resolution is measured in dots per inch ( dpi).
• The higher the dpinumber, the better the resolution as well as the visual appeal of the image.
• Common raster file formats include: TIFF, JPEG, GIF, PCX and BMP files.
• Images in the Raster format have become an essential part of the Web standard, which means they will be used in all images available on the internet.

Also, JPEGs as well as JPGs are not vector images.

Image source: PrintCNX

Here's some information about vector images to ensure you're able to recognize the difference:

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• Images are based on mathematical formulas that define geometrical shapes such as lines, polygons, curves, circles, and rectangles.
• Perfect for straight-edged images like line art.
• Since there aren't color gradations, they work well for flat pictures that are uniformly colored.
• Include popular images like letters, logos, and fonts.
• It is possible to scale up or down without any loss of quality because they don't rely on pixels to make an image complete.

2. Both Terms Mean the Same Thing

Did you remember when we talked about the word JPEG and how it stood at the Joint Photographic Experts Group? The answer is yes; JPEG and JPEG and JPG are abbreviations of that same ISO sub-committee.

3. Both Are Used for the Same Image Types

Because they're raster images that are not vectors, neither .jpeg and .jpg file formats are best used for digital photography. Digital photographs feature a range of color variations that appear seamless when they are saved as JPEG/raster images. Visitors to your website will always see a beautiful image if it's saved in an .jpeg/.jpg that is uploaded to the website.

Find out more about image file types and the impact they have on your website.

4. Both Lose Some Quality When Saved

Since the .jpeg in comparison to .jpg comparison is ineffective ( because they are identical) So it is natural that the compression method employed on each file format -- lossy compression-- can result in a decrease in image quality when the size decreases.

In addition, this implies that no matter what file extension you are using ( either .jpeg or .jpg), your image's file size will be smaller than what it was before and will result in faster loading time when uploaded to your website, and users visit your site.

In the end, JPEGand JPGs are the same thing and have several primary uses: to reduce the size of files to make them easier to view on the internet and offer users a simple way to compress their images on saving. Name the file with a commonly used file extension that is recognized by many.

Then ask yourself: JPG vs JPEG Which one is better? From there, take your time because there is no difference. They're both the same. whichever one you choose, is merely a matter of your preference.

JPG vs JPEG 2000

If you've ever been in search of information regarding JPEGs and JPGs then you've likely encountered the term JPEG 2000and wondered what in the world it was. After all, that's not an option that is available in many image editing software.

JPEG 2000 was an image encoding system created by the Joint Photographic Experts Group in 2000 that was designed to be superior to the JPEG standard in use. In reality, it was created to enable lossless compression for Images employing advanced compression techniques using a discrete wavelength transformation.

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It offered people a way to increase the quality of their images and save them in JPEGs, without degrading the quality of the image.

Here are a few of the key features from JPEG 2000:

• advanced Compression Methodsunlike standard JPEGs, JPEG 2000 was able to use lossy and lossless compression ( even on a single image file).
• Progressive Decoding:enables site visitors to see an image with a lower-quality version of an image, even as the entire image is still being downloaded on the background. As more data downloads, you can see the image's quality increase for the viewer.
• Higher Compression Ratios:when it concerns lossy compression JPEG 2000 could compress an image between 20-200% greater than JPEG, while maintaining the same image quality when you compare it to JPEG. JPEG image of the same resolution.

Additionally, JPEG 2000:

• Helps preserve transparency in images.
• It can describe grayscale, bi-level palette-color, full-color and bi-level images.
• Includes unlimited amounts of private or special-purpose information in metadata.
• Larger image sizes can be handled ( greater than 64K x 64K pixels), with no tilting.
• Ultra-low latency, which is especially beneficial when streaming live TV.
• Scalability in both resolution and quality.

JPEG 2000 Limitations

Although JPEG 2000 has plenty of wonderful features and may be the next-best quality digital image coder but there are many reasons JPEG 2000 isn't widely used by most people:

• No Universal browser compatibility ( only supports Safari).
• incompatible with JPEG ( must encode an entirely new standard and be compatible with the original JPEG).
• Encoding JPEG 2000 files can be computationally intensive, and could strain servers and cause slowdowns.
• A number of websites and cameras aren't yet ready to adopt this format as it isn't widely accepted.

Due to its limitations it's hard to find that JPEG 2000 file format as an option for saving your digital images. Even though it's better than JPEG, until it is widely accepted, you'll likely run into a bunch of compatibility issues that make your work harder as a website owner than it has to be.

Convert Image Files to JPG: Common Methods

There are many options to save your digital pictures in .jpg or .jpeg files. Let's examine a few.

1. Windows Paint

If you have Windows, you can easily save any image as a .jpeg or .jpg using Windows Paint. Just upload your image to Windows Paint, go to Fileto File> Save to select the destination of your file, give it a name, and then save your image, then select JPEG (*.jpg, *.jpeg, *.jpe, *.jfif)from the drop-down options.

Windows Paint

Then , click the Save button.

2. Affinity Designer

Affinity Designer is similar to other image editing software , such Adobe Photoshop. To save an image as a JPG using a tool like this, start by opening the application and uploading the image. Make any changes you wish to make and then click "Filethen Export.... Then, select the JPEG icon, choose which quality you want to use ( best, high, medium, or low) and click Export.

Affinity Designer

Once you have done that you do, The save As dialog will open and you can choose a destination, name the image and verify that you save the file as a JPG.

"Save as" in Affinity Designer

Click Save.

3. Online Converter Tool

If you're trying to convert images to JPG There are several free online jpg converter tools to help. For example, FileZigZag is a free online file converter that's simple to use. Drag and drop your image file , or upload it then select the format to convert the image into you, then type in your email address, then click to convert.

Convert png into jpeg FileZigZag

Of course, you might not want to give your email address in exchange for changing your image to a JPG. That's why we've collected some other free and premium solutions that you can check out:

• XnConvert : perfect for advanced image editors that need lots of image file formats, with the capability to convert in bulk, and also use Windows, Mac, or Linux.
• Zamzar :a free online tool designed for users with larger image files ( up to 50MB) with the option of having the final image emailed or not.
• Adapter : a simple image converter that supports batch images. It converts images instantly and works with macOS and Windows.

Of obviously, these are some of the available options for you to consider if need to convert your images to JPG.JPG is different from JPEG What is the difference? What about JPEG 2000? Find the answer (and more) with our extensive guide! CLICK TO TWEET

Summary

JPG in contrast to JPEG are the most widely used options for file extensions and compression for people who want to store or save images in digital format. This is especially relevant for websites that wish to present visually pleasing images and ensure a great user experience.

For your convenience, it doesn't whatever you'd prefer .jpeg, .jpg or .webp type of files, you're sure to see the same results: beautiful images that load lightning fast for website users.

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