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JPG vs JPEG: Understanding the Most Common Image File Format

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

In this article, I'll present an JPG comparison with a JPEG comparison so that you can understand the difference, as well in other aspects that will enable you to upload the finest images to your website to provide the best user experience. If your looking for an in-depth overview of the modern .webp format, we've got you 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 webmaster dealing with images, you have probably seen the file format JPEG sometime in your uploading and editing adventures.

But did you realize that the term JPEG may actually refer to term used to refer for three different things?

Yes, it's so and we're here to explain all of them:

1. JPEG Lossy Compression

When you upload pictures to your website It's crucial to make sure you don't affect your site's speed and performance by uploading large images that use up resources and take a long time to render on frontend of your site. In reality, all site owners should optimize their photos in some way to reduce the size of their images and preserve the loading time and user experience.

This is where JPEG is helpful. JPEG is a lossy compression tool used to ensure the digital images that are used are as small as possible and load quickly for those who want to view them.

Here are some important things you should keep in mind regarding lossy compression:

• The file size of an image being compressed is permanently reduced by eliminating unnecessary ( redundant) informationfrom the image.
• Image quality isn't perfect and it's sometimes such that the average user isn't able to tell.
• When compression is being performed, each pixel is then compared to pixels surrounding it by a ratio ranging from 2:1 up to 100:1 ( any pixels that exactly match the original ones are removed as they are deemed unneeded).
• JPEG lossy compression is generally used for photographsand complex still images.
• If you are compressing an image using lossy compression, you decide your file's size as well as the image value trade-off ( e.g., smaller files = worse image quality).
• the more editing, saving and editing of one image you edit your image, the poorer the quality of the image will be.

If you're adept at editing images using lossy compression, there is an opportunity to improve the image quality while reducing the size of your file through working with RAW JPEG images Editing them, and save the image just once.

convert to bmp

If you're not keen to do JPEG lossy compression on the images you upload to your website You can opt for a different option lossless compression.

Lossless compression allows your images to be saved in a totally distinct format ( usually PNG). While the quality of the image is not compromised because no information can be removed, you should know that using lossless compression, the final resolution of the photo you choose to save will be bigger than the one created by lossy compression. This can result in longer loading times on your page.

2. Joint Photographic Experts Group (JPEG)

JPEG is the acronym of the Joint Photographic Experts Group, which is the name given to the sub-committee which helped to create the JPEG standard in addition to other standards for still pictures within the larger group known as ISO.

The first JPEG standard was introduced in the year 1992 by ISO ( International Organization for Standardization). ISO is accountable for creating documents in which "...provide requirements and specifications, guidelines or other characteristics that can be used consistently to ensure that products, materials, processes and services are suitable to serve their purpose."

ISO sets guidelines for many aspects including digital imagery, so as to provide customers and users with the most superior products and services.

Image source: Wikimedia Commons

This international organization is a voluntary group of people with members from more than 164 nations and is the world's largest developer of standards.

3. JPEG as a File Format

Another way in which JPEG is used is when it refers to a name for a file format or as a method to store pictures in digital format. This is probably how you're most familiar with JPEG since it's one of the formats for file options that you can select when you save an image after editing it.

JPEG file format

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

• The most popular image file that is used with digital cameras and other image capturing devices.
• Supports 16,777,216 colors, which can be created using 8 bits of each RGB models of color.
• Can display More than 16 million color at once, making the colors and the contrast nearly perfect.
• Supports a maximum size of 65.535 x 65.535 pixels.
• This reduces the dimension of images by approximately 50-75% ( because of lossy compression) when saving

In addition, this file format is not ideal for pictures with sharp edges because the colors blend together more than if they were saved in .png or.jpg, which show each individual pixel as a mix.

So, now let's check out what JPG is.

What is JPG?

What is JPG when compared JPEG? JPEG?

File extensions in Windows

If you're looking for a way to compare to .jpeg and .jpg in reality, there is no difference between themexcept the amount of characters.

Crazy right? Let us explain.

The term JPG exists because the earlier version of Windows operating systems. Specifically, the MS DOS 8.3 and the FAT-16 systems allowed a maximum 3 letters for file names, in contrast with similar operating systems to UNIX, such as Mac or Linux and Linux, which didn't have the same limit.

Thus, on Mac or Linux systems images saved in JPEG format utilized the extension .jpeg. But when it came to saving these exact types of images for Windows the extension had to be reduced to .jpg so it didn't exceed the limit of 3 letters.

Today, Windows operating systems accept files with 3- or 4-letter extensions such as .jpeg as well as .jpg. However, because so many people use Windows for years, and are used to saving their images as JPGs but they've not stopped. As a result, the photo editing programs like Adobe Photoshop and GIMP save all JPEG images with the .jpg file extension for equally Windows as well as Macs to prevent confusion.

JPG vs JPEG: Similarities Between the Two

Okay, so you know that .jpeg and .jpg files are the same identical file. To bring that point home, and help you remember this information into the future, we'll review the similarities between JPEG and JPG images.

1. Both Are Raster Images (Not Vector Images)

Computer-generated images can be constructed as vector or raster images. In the same way, since JPEGs are raster images, then so are JPGs.

Bitmaps are graphic representations of images. A bitmap is a grid of individual pixels which when combined create an image. In other words, raster photos consist of numerous tiny squares ( or pixels) of color that are each encoded with a particular hue or shade that when taken together create an image that is easy for viewing.

Image source: PrintCNX

Here's more information on raster images that will help you better understand:

• Useful for non-lined images such as photographs, scanned artwork, or intricate graphics.
• They have subtle hue or shade gradations . They also have very vague lines and shapes.
• Because of their pixels-based nature, they face quality issues when they are blown up in size ( they become jagged and expose individual pixels).
• They are identified and displayed at a certain resolution. This resolution is calculated in dots per inches ( dpi).
• The higher the dpinumber, the better the resolution as well as the aesthetic effect of the photo.
• Common raster file format options include: TIFF, JPEG, GIF, PCX and BMP files.
• Raster images can be described as standard on the Web standard, which means that they will be used in all images available on the internet.

Also, JPEGs as well as JPGs aren't vector images..

Image source: PrintCNX

Here's some information regarding vector images, so you're able to recognize the difference:

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• Images are based on mathematical formulas which define geometric shapes such as lines, polygons or curves, circles and rectangles.
• Great for straight-edged images like line art.
• Because there are no color variations, they are ideal for flat photographs that are uniformly colored.
• Include popular graphics such as logos, letterhead, and fonts.
• The ability to scale up and down is not accompanied by any loss of quality because they don't rely on pixels to create the complete.

2. Both Terms Mean the Same Thing

Have you ever thought about the term JPEG and what it meant for Joint Photographic Experts Group? Yes, you read it that each JPEG and JPG are abbreviations of that same ISO sub-committee.

3. Both Are Used for the Same Image Types

Since they are raster images, and not vectors, each of the .jpeg and .jpg formats are the best employed for digital photography. Digital photographs have extensive color gradations that look seamless when you save them as raster JPEG/JPG pictures. So, your visitors will always see a beautiful photograph if it's saved as an .jpeg/.jpg that is uploaded to the site.

Learn more about image file types and how they impact your site.

4. Both Lose Some Quality When Saved

Because the .jpeg comparison is null, and the.jpeg .jpg comparison is ineffective ( because they are exactly the same thing) This is normal that the compression technique employed on both formats -- lossy compression-- results in some loss of image quality when the size shrinks.

Furthermore, this means that whichever file extension you are using ( either .jpeg or .jpg), your image's file size will be smaller than it had been originally, and this will result in faster loading time when uploaded to your site and users visit your site.

In the end, JPEGand JPGs are the same thing and serve only a handful of purposes for reducing the size of the images' files to make them easier to view on the internet and give users an easy method to compress images when saving. They can also name the file using a common file extension that is recognised by many.

Then ask yourself: JPG vs JPEG Which one is better? From there, don't get too involved because the answer is neither. Both are the same, and whatever you choose to use, is simply a matter preference.

JPG vs JPEG 2000

If you've ever been seeking information about JPEGs and JPGs, it's possible that you've come across the term JPEG 2000and thought about what in the world that was. In reality, it's not an option available in the majority of picture editing tools.

JPEG 2000 was an image encoder developed by the Joint Photographic Experts Group in 2000 that was designed to be superior to the JPEG standard that was in place. Actually, it was created to enable lossless compression for Images with the use of advanced compression techniques based on a discrete wavelength transformation.

If you're uploading plenty of images and photos to your site, you shouldn't want to provide pages that are slow to visitors, do you? Our servers are lightning fast and 24/7 world-class assistance from WordPress experts. Learn more about our plans

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

Here are a few of the most important features included in JPEG 2000:

• The latest Compression Technologies:unlike the traditional JPEGs, JPEG 2000 could offer lossy and unlossless compression ( even on a single image file).
• Progressive Decoding:enables users to view low-quality versions of an image while the whole process is downloading at a background. As more data is downloaded the quality of the image is improved for the viewer.
• Higher Compression Ratios:when it comes to lossy compression, JPEG 2000 is able to compress an image between 20-200 percent higher than JPEG and maintain the same quality of image when in comparison to JPEG. JPEG image of the same size.

In addition, JPEG 2000:

• Helps preserve transparency in images.
• Can provide bi-level, grayscale, palette-color, and full-color images.
• Incorporates unlimited amounts of private or specific-purpose information within metadata.
• Larger image sizes can be handled ( greater than 64K x 64K pixels), with no tilting.
• Ultra-low latency, which is particularly useful in live TV programming.
• Scalability, both in resolution and quality.

JPEG 2000 Limitations

While JPEG 2000 is packed with amazing features and appears to be the next most efficient technology for digital images to code However, there are several reasons it's not yet the most popular format for the majority of people.

• There is no worldwide browser support ( only supports Safari).
• Uncompatible With JPEG ( must encode an entirely new standard and be compatible with the original JPEG).
• The process of encoding JPEG 2000 files can be computationally intensive, and could make servers overloaded and cause slowdowns.
• Numerous cameras and websites aren't ready for this format as it isn't universally accepted.

Due to its limitations, you'll have a hard time finding that JPEG 2000 file format as an option to save your digital photos. While it's superior to JPEG, until it is universally accepted and accepted, you'll likely run across a myriad of compatibility problems, making your job more challenging as a webmaster than it has to be.

Convert Image Files to JPG: Common Methods

There are numerous ways that you can save digital photos as .jpg as well as .jpeg files. Let's take a look at the most common.

1. Windows Paint

If you're using Windows it is possible to save any image to .jpeg or .jpg by using Windows Paint. Upload your photo to Windows Paint, go to the File menu, selectthe menu, then save as select the desired destination for the file, choose the name of your image, and select JPEG (*.jpg, *.jpeg, *.jpe, *.jfif)from the dropdown option.

Windows Paint

Then click "Save.

2. Affinity Designer

Affinity Designer works similarly to other image editing software , such Adobe Photoshop. To save your image as a JPG with a software such as this, you must first open the program and uploading your image. Edit the image as you like and then click Filethe option to Export.... Next, click on then the JPEG icon, choose the quality ( best, high medium, or low) and click Export.

Affinity Designer

If you do, you will see the Saving As dialog will open and you can select a destination, name your image, and then confirm that you are saving the file as JPG.

"Save as" in Affinity Designer

Click Save.

3. Online Converter Tool

If you're trying to convert images to JPG there are plenty of free online tools to aid you. For instance, FileZigZag is a free online converter for files that is easy to use. Just drag and drop your image file , or upload it, choose the file type to convert it into and then enter an email address, and then click "Convert.".

Convert png to jpeg FileZigZag

Of course, you'll not want to share your email in exchange for changing your image to a JPG. That's the reason we've gathered several other premium and free options to check out:

• XnConvert : perfect for advanced image editors that require many image file formats, the capacity to bulk convert, and also use Windows, Mac, or Linux.
• Zamzar :a free online tool that can be used by people who have larger images ( up to 50MB) who wish to have the option to have the final product emailed to them or not.
• Adapter : a simple image converter that supports batch images. It is also able to convert images immediately and runs on both macOS and Windows.

Of obviously, these are some of the available alternatives you can choose from if you would like to convert images to JPG.JPG is different from JPEG What's the difference? What's different about JPEG 2000? Get the answer (and more) within our comprehensive guide! CLICK TO TWEET

Summary

JPG Vs JPEG are the most common file extensions and compression methods that allow users to save an image in digital form. This is especially true for webmasters who want to present visually pleasing images as well as provide an outstanding user experience.

Luckily for you, no whatever you'd prefer .jpeg, .jpg or .webp formats, you'll be able to see the same results: beautiful images that load lightning fast for website users.

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