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JPG vs JPEG: Understanding the Most Common Image File Format

Website owners encounter image files every day. While you don't have to be an expert at image editing to edit images and upload them to websites it is important to familiarize yourself with common file formats such as JPEG. Or is it JPG?

In this article, we'll discuss the JPG contrast with JPEG comparison so that you can understand the differences, as well with other information that will aid you in uploading the highest quality images possible to your website for the ultimate user experience. If your looking for an in-depth overview of the modern .webp format and how to use it, we've got that covered as well.

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 administrator working using images, you've probably seen the file format JPEG on occasion in your editing and uploading journeys.

Did you realize that the term JPEG refers to a term used to refer for three different things?

That's right, and we're here to explain all of them:

1. JPEG Lossy Compression

When you upload images to your website be sure to make sure you don't impact your website's speed or performance by using massive images that consume resources and take a long time when loading up on frontend of your site. In fact, all website owners should optimize their images by some means to decrease the size of their photos and ensure the loading time and user experience.

That's where JPEG is helpful. JPEG is a lossy compression method used to ensure the digital images that are used are as small as they can be and load fast when someone needs to see them.

Here are some points to keep in mind about lossy compression:

• The file size of the image being compressed is permanently reduced by getting rid of unnecessary ( redundant) informationfrom the image.
• Quality of the images is a concern in some cases, but the impact is usually minimal that a typical site user isn't able to tell.
• During the compression process each pixel of the compressed image is compared to nearby pixels by a ratio ranging from 2:1 up to 100:1 ( any pixels that exactly match the original pixel are then eliminated as they are deemed unnecessary).
• JPEG lossy compression is often used for photographsand complex still images.
• The moment you compress an image with lossy compression, you decide the size of the image and the Quality trade-off ( e.g., smaller files = poor image quality).
• The more editing and saving of one image you do more, the worse the quality of the image will be.

If you're more experienced in editing images using lossy compression, there's an opportunity to preserve the image's quality and reduce the size of the file through working with RAW JPEG images editing them, then saving the image one time.

convert to BMP

If you're not interested in having to apply JPEG lossy compression of the images on your site You can opt for a different option lossless compression.

Lossless compression can save your images in a totally new format ( usually PNG). While the image quality cannot be diminished because there is no information can be removed, you should know that using lossless compression, the final resolution of the photo you choose to save will always be larger than that of lossy compression. This may result in lower loading speeds for pages.

2. Joint Photographic Experts Group (JPEG)

JPEG is the acronym for Joint Photographic Experts Group, that's the name of the sub-committee that helped create the JPEG standard in addition to the other standards for still images under the broader group called ISO.

The first JPEG standard was issued at the end of 1992 and was issued by ISO ( International Organization for Standardization). ISO will be responsible for preparing guidelines that "...provide requirements standards, specifications, guidelines or other characteristics that can be continuously used to assure that products, materials, processes and services are suitable to serve their purpose."

ISO establishes guidelines for many aspects which includes digital images in order to provide users and consumers with the top quality products and services.

Image source: Wikimedia Commons

This international association is a free association of members from over 164 different countries and is the largest creator of standards.

3. JPEG as a File Format

The third way JPEG is utilized is when you're referring to a file format name or a way to save the digital image. This is likely the way that you're most familiar with JPEG because it's one of the formats for file choices you have when you save an image after editing it.

JPEG file format

Here are some fun facts regarding and the .jpeg file format:

• The most common image format used by digital cameras and other devices to capture images.
• It supports 16,777,216 colors. The colors are created using 8 bits of each in the RGB color model.
• It can display over 16 million colours at once The combination of color and resolution nearly perfect.
• Supports a maximum size of 65.535 x 65.535 pixels.
• Cuts down the size an image by about 50-75% ( because of lossy compression) when saving

Finally, this file format isn't suitable for images with sharp edges , as the colors blend in more than when it is saved as a .png, which display every single pixel as a blend.

Now, let's figure out what JPG is.

What is JPG?

What exactly is JPG relative the other formats, JPG and JPEG?

Extensions for files in Windows

If you're looking for a way to compare to .jpeg instead of .jpg there is no difference. there's no distinction between themexcept the amount of characters.

Crazy right? Let us explain.

The term JPG originates from the earlier version of Windows operating systems. Particularly, the MS-DOS 8.3 along with FAT-16 systems had a limit of 3 letters for names of files, whereas other operating systems that resembled UNIX such as Mac or Linux, which didn't have this limitation.

Therefore, on Mac and Linux systems images that were saved as JPEGs utilized the extension .jpeg. But when it came to saving these same types of images using Windows The file extension needed to be changed to .jpg to avoid exceeding the limit of 3 letters.

Today, Windows operating systems accept 3- or 4-letter file extensions such as .jpeg or .jpg. Because so many users are using Windows for so long, and have a habit of saving their images as JPGs however, they've continued to do so. As a result, applications for photo editing like Adobe Photoshop and GIMP save all JPEG images automatically to the .jpg extension for files on both Windows and Macs to avoid confusion.

JPG vs JPEG: Similarities Between the Two

Okay, so you're aware you know that .jpeg and .jpg files are the exact exact thing. But to help drive this message home and help you remember it well into the future, let's examine the similarities between JPEG along with JPG images.

1. Both Are Raster Images (Not Vector Images)

Computer images can be created as raster or vector images. Since JPEGs are raster images, so too are JPGs.

Graphics called bitmaps are images. A bitmap is simply a grid of individual pixels which when combined create an image. In another way, raster images comprise a variety of little squares ( or pixels) of color each encoded with a particular shade or hue. They taken together form an picture that makes sense to examine.

Image source: PrintCNX

Here's more information about raster images to assist you in understanding:

• It is ideal for non-lined pictures such as photographs, scanned artwork, or detailed graphics.
• They're characterized by subtle hue and shades and also very undefined lines and shapes.
• Due to their pixels-based nature, they experience problems with quality when blown in dimensions ( they become jagged and reveal the individual pixels).
• They are identified and displayed with a specific resolution. It is calculated in dots per inches ( dpi).
• The higher the dpi, the better the resolution as well as the aesthetic impact of an image.
• Common raster formats for raster files include: TIFF, JPEG, GIF, PCX and BMP files.
• Raster images are the Web standard, which means they are the preferred images on the internet.

In addition, JPEGs and JPGs aren't vector images..

Image source: PrintCNX

Here's some information on vector images so it is easier to understand the distinction:

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• Images are based on mathematical formulas that define geometric shapes , such as polygons, lines as well as circles, curves and rectangles.
• Perfect for straight-edged images like line art.
• Since there aren't any color gradients, they work for flat photographs that are uniformly colored.
• Utilize popular images, such as logos, letterheads and fonts.
• You can scale down or up without losing quality since they don't depend on pixels to make an image whole.

2. Both Terms Mean the Same Thing

Remember when we spoke about the word JPEG and the way it stood at the Joint Photographic Experts Group? You've guessed it; both JPEG as well as JPG are abbreviations for that same ISO sub-committee.

3. Both Are Used for the Same Image Types

Because they are raster images and not vectors, each of the .jpeg and .jpg file formats are best utilized for digital photography. Digital photographs feature a range of color variations that look seamless when saved as raster JPEG or JPG images. Your site's visitors will always be able to see a stunning photograph if it's saved as an .jpeg/.jpg that is uploaded to the site.

Learn more about image files types and their impact on your website.

4. Both Lose Some Quality When Saved

Since the .jpeg compares to .jpg comparison is null ( because they are the same exact thing) so it is natural that the compression technique used on each file formatlossy compression can result in a decrease in image quality as the size decreases.

Furthermore, this means that regardless of what extensions you employ ( either .jpeg or .jpg), your image's file size will be smaller than it was originally and result in faster loading times when uploaded on your website and viewed by site visitors.

In the final analysis, JPEGand JPGs are the same and have a number of main uses that are to decrease the size of files for better web browsing, and offer users a simple way to compress their images upon saving and name the file with a commonly used file extension that is known by a large number of.

If you ask yourself this question: JPG vs JPEG, which is better? From there, take your time because the answer is neither. They are the same and which one you pick is a matter of your preference.

JPG vs JPEG 2000

If you've been looking for information about JPEGs and JPGs, you might have encountered the term JPEG 2000and wondered what in world this was. For one thing, it's not an option in all photo editing programs.

JPEG 2000 was an image encoding system created by the Joint Photographic Experts Group in 2000. It was designed to be better than the JPEG standard currently in use. In actuality, it was made to implement lossless compression of Images using advanced compression techniques on a discrete wavelength transformation.

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It provided people with a method to boost their images and save them in JPEGs, without degrading the quality of the image.

Here are a few of the most important features to be found in JPEG 2000:

• advanced Compression Technologies:unlike the traditional JPEGs, JPEG 2000 was able to do lossy as well as lossless compression ( even on a single image file).
• Progressive Decodingenables visitors to view an image with a lower-quality version of an image even though the entire process is running on the background. As more data is downloaded the quality of the image is improved for the viewer.
• Higher Compression Ratioswhen it concerns lossy compression JPEG 2000 will compress images from 20 to 200 percentages greater than JPEG and maintain the same image quality when you compare it to a JPEG image of the same resolution.

In addition, JPEG 2000:

• Allows for preservation of transparency in images.
• Can provide bi-level, grayscale, palette-color, and full-color image data.
• Includes unlimited amounts of private or special-purpose information within metadata.
• Can handle larger image sizes ( greater than 64K x 64K pixels) and without tilting.
• Ultra-low latency, which is especially useful for live TV.
• Scalability of resolution as well as quality.

JPEG 2000 Limitations

While JPEG 2000 contains a number of wonderful features and may be the next best format for digital images for coding However, there are reasons it's not an option for most people:

• No worldwide browser support ( only supports Safari).
• Not compatible not compatible with JPEG ( must encode an entirely new standard and be compatible with the original JPEG).
• Encoding JPEG 2000 files can be processing intensive for CPUs, which can make servers overloaded and cause slowdowns.
• Many 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 an alternative to the JPEG 2000 file format as an option for saving your digital photos. Although it's superior to JPEG, until it is accepted by everyone and accepted, you'll likely run across a myriad of compatibility issues making your life more difficult as a webmaster than it needs to be.

Convert Image Files to JPG: Common Methods

There are a variety of options that you can save digital photos in .jpg or .jpeg files. Let's explore several.

1. Windows Paint

If you are running Windows it is possible to save any image to .jpeg or .jpg with the help of Windows Paint. Just upload the image to Windows Paint, go to the Fileto File> Save to, choose the image destination, enter the name of the image, and then choose JPEG (*.jpg, *.jpeg, *.jpe, *.jfif)from the drop-down menu.

Windows Paint

Then , click "Save.

2. Affinity Designer

Affinity Designer is similar to other image editing software such as Adobe Photoshop. When saving images as a JPG using a software like this, open the application and uploading your image. Make any edits you want and then click Filethe option to export.... Select that JPEG icon, choose your preferred quality ( best, high medium or low) and select Export.

Affinity Designer

When you click Save As choose to save the file, your When you do, the Save As dialog will be displayed so you can choose a destination, name the image and verify that you are saving the file as a JPG.

"Save as" in Affinity Designer

Click Save.

3. Online Converter Tool

If you want to convert images to JPG There are several free online tools for converting images to JPG to aid you. For example, FileZigZag is a free online file converter that's simple to use. Just drag and drop the image file onto the program or upload it and choose the file type for the image to be converted entering an email address, and then click to convert.

Convert png files to jpeg FileZigZag

Of courseyou'll not be willing to divulge your email address in exchange for turning your image into a JPG. That's why we've rounded up several other premium and free solutions to check out:

• XnConvert : perfect for advanced editors who require numerous image file formats, and the capability to convert in bulk, and also use Windows, Mac, or Linux.
• Zamzar :a free online tool for those with big pictures ( up to 50MB) who would like the option to have the final output emailed or not.
• Adapter : a simple image convertor that supports batch images. It converts images instantly and is compatible with both macOS as well as Windows.

Of course, these are some of the options you have if you want to convert images to JPG.JPG is not the same as JPEG: What's the difference? What about JPEG 2000? Find out (and more) in our complete guide! CLICK TO TWEET

Summary

JPG and JPEG are among the most used options for file extensions and compression for those wanting to store and save digital images. This is especially the case for websites that wish to display visually appealing imagery and ensure a great user experience.

There's good news for you: no which of .jpeg, .jpg or .webp file types, you're going be able to achieve the same result: beautiful images that load blazing fast for site users.

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