JPEG vs JPG – What’s the Difference? (Everything You Should Know)

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JPEG vs JPG (Compared)

Are you wondering which is a better file format JPEG vs JPG? Or want to know what’s the difference between them? If you’re unsure which of these 2 file formats is best, then stay here!

Someone who works on a computer and has worked with digital images may have used JPGs and JPEGs before. They both are the most commonly used formats to save digital images

However, most of you still wonder what the difference is between them. And which one is better to use? So, to answer these questions, we present you with the comparison between “JPEG vs JPG”.

In this article, we’ll explain what a “.jpg” and “.jpeg” file extensions are, compare them, and which might work best for you. Let’s get started!

Video Guide – JPEG vs JPG

Prefer watching a video instead? Here’s a complete video guide on the differences between JPEG vs JPG.

Video Tutorial – JPEG vs JPG

Nevertheless, keep reading for more insights on their differences!

What is JPEG?

JPEG is a commonly used image file format to store and save digital images on your computer. This is the definition that has been fed to us since the very beginning.

But did you know that JPEG can be referred to as three different alterations? If not then, let’s talk a little about these references. They are:

  • JPEG Lossy Compression
  • Joint Photographic Experts Group (JPEG)
  • JPEG File Format

1. JPEG Lossy Compression

Have you all realized when uploading a large image to your site, it somehow affects your site’s speed and performance? It takes time to load on the front end killing the visitors’ experience.

What is JPEG?
What is JPEG?

If this is something that bothers you then, you should somehow optimize those images. When you do so it not only reduces the file size of that image but also improves loading times. Hence, you can surely provide an excellent user experience.

At that very moment, JPEG comes in handy.

  • JPEG acts as a lossy compression method that ensures the size of the images remains as small as possible. Now, the images load quickly when someone wants to view them.
  • Each pixel is compared to pixels surrounding it in a ratio ranging from 2:1 to 100:1 (any pixels that are the same as the original are then deleted as they are deemed redundant).
  • The image file size will be compressed, permanently reducing the size after eliminating unnecessary information. This may affect the image quality to some extent.

To your PLUS, most of the visitors won’t even realize as the change is quite small in number.

This method is mostly used for photographs and complex still images. But did you know that you can find whether the image quality is good or bad just by looking at its file size?

Yes, you can do so by checking the image file size. If the file size is smaller, then the image quality will be bad. When you edit and save a single image recursively, this will worsen the image quality.

Image Quality Levels
Image Quality Levels

Nevertheless, you can perform lossless compression as an alternative to lossy compression.

What is a Lossless Compression?
As an alternative, lossless compression works quite differently to save your images in a different format. As it uses PNG format to save your image file.
In this method, you’ll never have to sacrifice the quality of the image. Unlike lossy compression, it doesn’t eliminate any information from your image. 
Therefore, the final file size of your image after lossless compression will always be bigger. Indeed, this may result in slower page loading times.

2. Joint Photographic Experts Group (JPEG)

Have we told you what JPEG abbreviates to? JPEG stands for the Joint Photographic Experts Group.

JPEG is an ISO/IEC group that created the JPEG image format. The group is a subcommittee of the ISO (International Organization for Standardization).


They’re the well-known group of experts that develops and maintains picture coding standards under the ISO. ISO is responsible for developing standards to ensure the product, service, or system quality, safety, and efficiency.

ISO also set some standards for digital images. So that, the website owners can provide their users and consumers with the best image quality and services.

This independent, non-governmental, international organization has a membership of over 164 countries. They’re working together to develop international standards that cover many aspects of technology, management, and manufacturing.

3. JPEG File Format

Lastly, the term JPEG is also referred to as a file format that is used to store and save digital images. You might have seen this format quite often since it’s the most used option when you save an image after editing it.

In fact, it’s a type of file format that you can use to convert it into another format such as JPG. 



Here are some amazing fun facts about the .jpeg file format –

  • JPEG files are the most common and universally recognized image file format for digital cameras.
  • Its small file sizes allow you to quickly transfer images and provide fast access for viewing online.
  • To your surprise, it supports 16,777,216 colors, produced using 8 bits of each in the RGB color model.
  • It tries to keep its file size as small as possible.
  • With lossy compression, you can reduce the size of an image by up to 50-75% when saved.
  • It makes post-processing easier as you can easily set the white balance and saturation in JPEGs with the click of the shutter.

Having said all this, a JPEG file format isn’t an ideal option for images with a sharp color palette. In this case, the colors will blend if it was saved as a .png, which displays individual pixels as a combination.

Now that we know a bit about JPEG, let’s look at what JPG is.

What is JPG?

Have a first glance! You might think both JPEG and JPG look similar. The only difference you’ll see is that one of them is missing the letter “e” to it. And that’s TRUE too.

The only difference between jpeg vs jpg is the number of characters and that’s it. Besides that, there isn’t any difference between those two file types.

What is JPG?
What is JPG?

It might sound crazy at the very beginning but hear us out first.

The only reason why JPG exists in the first place is because of the earlier versions of Windows operating systems. At that time, the MS-DOS 8.3 and FAT-16 file systems could only take up to a maximum 3-letter limit for file names.

  • UNIX-based operating systems (OS) like Mac and Linux didn’t bother to add a limit to file names. So, they use a .jpeg file extension to save the images as JPEGs.
  • When it comes to old Windows OS, it gets shortened to .jpg to save those same types of images.

Nevertheless, with time, today’s Windows OS will accept both 3- or 4-letter file extensions such as .jpeg or .jpg. However, many people still use the JPG format to save their images.

That’s why many popular photo editing tools such as Adobe Photoshop save all JPEG images by default to the .jpg file extension. In this way, the users won’t get confused when they switch between the operating systems.

JPG vs JPEG 2000

Wondered what JPEG 2000 is when searching about the difference between JPG and JPEG?

As the name says, JPEG 2000 was initialized in the year 2000, representing an advancement over its predecessor, the traditional JPEG format. Its main features for image quality enhancements are:

  • Offers both lossy and lossless compression, ensuring high-quality images at reduced file sizes.
  • Provide progressive decoding so that images load incrementally, enhancing the user experience.
  • Higher compression ratios without compromising image quality, up to 200% more efficient than traditional JPEG.
  • Supports transparency, various image types, and unlimited metadata embedding.
  • Handles larger image dimensions beyond typical JPEG limits, suitable for professional and TV content.

Similarly, it also brought some demerits, such as:

  • Primarily supported by Safari, but lacks universal compatibility on other browsers.
  • JPEG 2000 is not backward compatible with the original JPEG format.
  • Demand more computational power, slowing down processing, mainly for large images.
  • Faces low adoption due to misalignment with user and system needs.

What are the Similarities Between JPG and JPEG?

Okay, so you know that .jpeg and .jpg are functionally the exact same thing. Indeed, they both refer to the same digital image format and have no differences between the JPG and JPEG formats.

Hence, you might now think about the similarities between them, then. To clear it out, in this section we’ll look at some similarities between JPEG and JPG images.

1. Both of These Are Raster Images

Many of you might think that images stored under the jpeg and jpg are two different image types. But that’s not true. Both JPEG and JPG images are raster images, not vector images.

What are Raster and Vector Graphics?

Raster GraphicsVector Graphics
Raster images define two-dimensional images built from pixels ––  a small addressable element or dot of a picture represented on a screen.

When these tiny pixels come together in great quantities it helps to create highly detailed images such as photographs.
A vector image uses mathematical representations like lines, polygons, and curves with fixed points on a grid to produce an image.

The best example of a vector image would be for printing. As it’s composed of a series of mathematical curves.
The more pixels on an image indicates the higher quality of that image. Due to their pixel-based nature, the images suffer in terms of quality when zooming up in size.Unlike raster images, you can scale up or down without any worry about the quality degradation of the image. As vector images don’t rely on pixels to create the image.
It prefers graphic formats like GIF, JPEG, PNG, PCX, etc. It’s mostly used for non-lined images like photographs, scanned artwork, or detailed graphics.It supports file extensions such as SVG, EPS, PDF, AI, and DXF.
Raster (JPEG) vs Vector (PDF) Files
Raster (JPEG) vs Vector (PDF) Files

2. Both Types of Losses Image Quality

We’ve already discussed earlier that both .jpeg and .jpg use lossy compression to shrink the size of the image. Meanwhile, as a consequence of that action, it results in deteriorating the quality of that image. Isn’t it heartbreaking?

The very reason to reduce the size of the image is to have a faster loading time when uploading onto your website. Therefore, when you use the file extension (.jpeg or .jpg) your image’s file size will always be smaller than the original. 


Now you know that both JPEGs and JPGs serve the same purpose. Their only goal is to reduce the file size of images for faster loading time and a better viewing experience. In fact, you can use any one of those file extensions to save the compressed image for further use.

Having said that, we cannot say which one is better. Since both of them serve the same purpose and shouldn’t be any matter of concern in the first place.

Lastly, it is all up to your preference on which file extension to use for saving your following beautiful digital images.

When to Use JPEG Images?

Did you know that JPEG files can display up to 16.8 million colors even when their size remains relatively small? This is why it’s a go-to- file format for many photographers and bloggers (publishers). 

i. For Photographic Images 

The pictures shot with digital cameras tend to be in a raw format. It helps to get the image in its actual color and surroundings.

Photographic Image Format
Photographic Image Format

Not just that digital cameras, in itself use .jpg formats. As it can be compressed into much smaller file sizes than other types of image files. In fact, it’s a great way to reduce the amount of storage space needed for images.

This will not only allow you to render images quickly but also open them faster online without sacrificing too much quality.

ii. For Web Content

The very best use that anyone can get from its web publishers and bloggers. Anyone who has a website can benefit from using JPEG files on their website.

Use Image to Highlight Informations
Images on Web Content

The use of JPEG files will make the images load faster on websites. With that, you’ll be able to give a great user experience to your visitors. Not just that, you can use JPEG files for email attachments because they’re small enough to send quickly.

What are the Pros and Cons of JPEG Files?

Here, let’s look at some of the benefits and disadvantages of JPEG files.

Starting with the pros.

Pros of JPEGs

  • JPEG files are quite popular and universally recognized image file formats.
  • In addition, it’s seamlessly compatible with most web browsers, software, and apps.
  • Provide quick transfer and fast access for viewing online.
  • You’ll find JPEG file format to be typically smaller in file size than the original image format.
  • Allow easy conversion of JPEG images into other file formats such as PNG and GIF.
  • Produce visually appealing results while maintaining fast loading times for web pages.
  • Enhance site performance by minimizing file sizes without sacrificing quality.
  • Offers a smooth user experience, which is crucial for maintaining visitor engagement.

Cons of JPEGs

  • Due to lossy compression and heavily compressed images, you might suffer with the image quality.
  • Sometimes JPEG format images can be difficult to edit because the quality of the image is reduced and compressed too much.
  • Not so well suited for images with sharp edges or large areas of uniform color.

Why Should You Compress the Images?

Image compression is the process of reducing the size of an image while maintaining as much quality as possible. In this way, you can easily store, transfer, and display images, without sacrificing the image’s visual quality.

Use High Quality Image and Multimedia
Image Compression

Now the question might arise why image compression is important. For that, here are some reasons why you should compress the image before adding it to the website:

  • A compressed image will help you with website optimization. When images are uncompressed it takes longer to load, causing your visitors to bounce.
  • This helps to reduce the amount of data being transmitted.
  • Any compressed images can be sent and uploaded easily. Meanwhile, uncompressed images take quite a time and some email servers also come with file size limits.
  • Lastly, it helps with reducing and saving the storage impact on your hard drive.
Image Compression Benefits
Image Compression Benefits

How to Convert JPG to JPEG?

JPG and JPEG are the same, however, you may require the conversion from JPG to JPEG sometimes. For instance, this conversion is needed if you upload the images to some sites accepting only JPEG.

Moreover, this conversion is possible in many ways. You can utilize online converter tools like Convertio and Canva. Some other tools include FileZigZag, Adapter, Zamzar, XnConvert, etc.

Otherwise, you can do that simply from the Photos, Paint, or photo editing application. Find the process below in 3 different ways:

1. Photos

In Windows OS, you can perform the conversion from your Photos file itself. So, open the image file and click ‘See more‘, followed by ‘Save as‘.

Click 'Save as'
Click ‘Save as’

When you’re saving that image, select ‘Save as type‘ as ‘.jpeg‘. Click the ‘Save‘ button. That’s all!

Save Image
Save Image

2. Paint

If you didn’t find the save option in JPEG format in Photos, then use Paint. Just right-click on the image and navigate to ‘Open with‘ and then ‘Paint‘.

There, click ‘File‘ and hover over to ‘Save as‘. There, pick ‘JPEG picture‘.

Save as JPEG Image
Save as JPEG Image

Now, insert the .jpeg extension on the file name. Lastly, hit the ‘Save‘ button.

Save File Name
Save File Name

3. Adobe Photoshop

For more advanced users, you can use photo editing programs like Adobe Photoshop. They offer enhanced control over the conversion process, including quality adjustments.

After opening your image, you can edit it as needed. Next, click ‘File‘ and then ‘Save for Web’.

Save for Web
Save for Web

Now, select the JPEG format in the 4-Up section. There, pick the desired quality level and hit ‘Save‘.

Save High Quality JPEG Image
Save High-Quality JPEG Image

Afterward, choose the file location, and save the image like in other methods.

By doing each of these methods, your image is saved using the JPEG image format. Congratulations!

Plus, you can find both the images with JPG and JPEG formats co-existing together in the same location.



1. Are there any differences between JPEG vs JPG?

Honestly, there isn’t any difference between the JPEG and JPG formats based on the lossy compression method. So, they are the same. The only difference is the number of characters used.

2. What is the difference between JPG, GIF, and PNG?

Mostly, JPGs are used for photographs and pixel-based images whereas PNGs are used for transparent images and vector graphics. Meanwhile, GIFs are usually used for images that contain animations and visual effects.

3. What is the difference between PDF and JPG?

A PDF is a document file type that contains images with text while a JPG is an image file type with text on the image. PDFs often deliver higher quality than JPEGs. It’s because JPEGs compress images that cause a loss in the quality of an image.

4. How to convert .jpg to .jpeg file format?

Image file format conversion from .jpg to .jpeg can be done in many ways. In a Windows OS, you can do that with the image viewer application or others like Paint. Otherwise, you can also use free online converter tools, like Convertio and Canva.

6. Can I convert an altered JPEG file to its original status?

If a JPEG image has been altered and saved in a smaller size, then it’s impossible to revert it to its original form. That’s because the resizing process omits some of the original data, which cannot be recovered once lost.

7. How can website owners ensure visually appealing imagery and maintain an exceptional user experience?

Site owners should choose the right image file types to ensure visually appealing imagery while maintaining an exceptional user experience. JPG and JPEG are the most common file extensions to store and save digital images.

8. What is the overall impact of using .jpeg or .jpg on web performance?

Using .jpeg or .jpg image formats improves web performance due to reduced file sizes by the lossy compression. This leads to quicker image load times. The file size decrease results in faster loading times when uploaded onto sites and viewed.

Learn how to make a website from scratch in this detailed guide.


That’s all, folks! We’ve come to the end of our comparison between JPEG vs JPG.

Although you might have been using JPGs and JPEGs every day, you still might not know that both are the same. Hence, we’re glad that you know their exact similarities and differences.

If you have any further queries about JPGs and JPEGs, then leave a comment below. We’ll try to get back to you as soon as possible.

Also, let us know which other file formats you’re using the most. You can share your pick in the comments section below. 

You may also like our other articles on the best image optimization plugins for WordPress. Besides that, read the best WordPress knowledge base plugins.

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Written By Alisha Bajracharya
Hello everyone! My name is Alisha Bajracharya and I'm a full-time content writer.


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