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JPG vs JPEG: Understanding the Most Common Image File Format

Website owners come across image files every day. While you don't need be an expert in image editing to edit and upload images on a website however, it is essential to be familiar with common file formats such as JPEG. Or is it JPG?

In this post, I'll show an JPG as well as a JPEG comparison so that you can understand what the differences are, as along with other tips to enable you to upload the finest images possible to your website to provide the best user experience. If you're seeking detailed information about the latest .webp format, we've got you 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

convert to jpeg

As a site owner working using images, you've most likely seen JPEG as a file format. JPEG sometime in your editing and uploading adventures.

Did you be aware that the term JPEG is actually a reference for three different items?

Well, it is and we're here in order to clarify all of them:

1. JPEG Lossy Compression

When you upload images to your website, it's important you take care not to negatively influence your website's speed and performance by uploading big images that consume a lot of resources and take forever for them to download on the front end of your website. In fact, all website owners must optimize their images in a way that reduces the file sizes of their images and preserve their loading times and improve the user experience.

That's the point where JPEG can be useful. JPEG is a lossy compression method that is used to ensure that digital images utilized are as compact as is feasible and loaded quickly when you want to access them.

Here are a few things to think about when it comes to lossy compression:

• The size of an image being compressed is permanently reduced by eliminating redundant ( redundant) informationfrom the image.
• Image quality can be affected however, but it's usually so small that the average visitors aren't able tell.
• During the compression process each pixel is compared to other pixels in a proportion ranging from 2:1 all the way all the way to 100 times one ( any pixels that exactly match the original are then deleted because they are considered unneeded).
• JPEG lossy compression is commonly employed for photographsand complicated still images.
• The moment you compress an image with lossy compression, you can determine the file size and image value trade-off ( e.g., smaller files = poor image quality).
• If you edit and save an image you do more, the worse the quality of the image will be.

If you're skilled in editing images with lossy compression, there is the possibility of saving the image's quality while also reducing its file size through working with RAW JPEG images as well as editing them and saving the image one time.

convert to BMP

If you're unable to perform JPEG lossy compression on the images you upload to your website you can always opt for lossless compression.

Lossless compression can save your images in a totally other format ( usually PNG). Although image quality is not compromised because there is no information is removed, remember that even with lossless compression, the final size of your image will be greater than that obtained with lossy compression. This may result in slower page loading times.

2. Joint Photographic Experts Group (JPEG)

JPEG is the abbreviation for Joint Photographic Experts Group, which is the name used to describe the subcommittee that was instrumental in establishing the JPEG standard in addition to the other standards for coding still images under the broader group called ISO.

The first JPEG standard was created in the year 1992 by ISO ( International Organization for Standardization). ISO will be responsible for preparing documentation that "...provide requirements and specifications, guidelines or specifications that can be used consistently to ensure that products, materials, processes and processes are suitable for purpose."

ISO sets standard for many things such as digital images so as to provide customers and clients with best products and services.

Image source: Wikimedia Commons

This international association is a open group of individuals with members in 164 countries, making it the world's biggest developer of standards.

3. JPEG as a File Format

Another way in which JPEG can be used is when you're referring to a file format name or as a method to store pictures in digital format. This is likely the way that you're most familiar with JPEG because this is one of the file format choices you have when you create an image and save it after you've edited it.

JPEG file format

Here are some interesting information about this format .jpeg Format:

• Most widely used image file standard used by DSLR cameras and other devices for capturing images.
• Supports 16,777 colors. are created using 8 bits each of the RGB color model.
• It can display more than 16 million colors simultaneously and make the color scheme and contrast resolution almost perfect.
• Supports a maximum size of 65,535 pixels x 65,535 pixels.
• The size is reduced of images approximately 50-75% ( because of lossy compression) after saving

Additionally, this kind of format for files is not suitable for images with sharp edges , as the colors mix more than if it were saved as .png image, which would display the every single pixel as a blend.

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

What is JPG?

What is JPG as compared with JPEG?

Extensions for files in Windows

Well, when it comes to .jpeg and .jpg it is the fact that there's no distinction 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. Specifically, the MS DOS 8.3 as well as FAT-16 system had a maximum 3-letter limit in name of the file, in contrast to Unix-like operating systems such as Mac or Linux with no this limit.

That's why, on Mac and Linux systems images saved in JPEG format utilized the extension .jpeg. However, when saving the same type of images on Windows the extension had had to be changed to .jpg so that it wouldn't go over the limit of 3 letters.

Nowadays, Windows operating systems accept the 3- or 4-letter file extensions like .jpeg as well as .jpg. However, because so many people have been using Windows for years, and are used to saving images in JPG format which is why they've never stopped. As a result, photo editing software like Adobe Photoshop and GIMP save all JPEG images by default to the .jpg file extension on both Windows or Macs to avoid confusion.

JPG vs JPEG: Similarities Between the Two

Okay, now you understand what .jpeg and .jpg files are basically the exact thing. But just to drive that aspect home, and help you remember it long into the future, let's review the similarities between JPEG and JPG images.

1. Both Are Raster Images (Not Vector Images)

Computer images can be produced in raster or vector formats. In the same way, since JPEGs are raster images, then so are JPGs.

The graphics in raster are bitmaps that are images. A bitmap is a pattern of individual pixels that when merged create an entire image. In terms of definition, raster pictures comprise of tiny squares ( or pixels) of color that are every one of them coded in a unique shade or hue. They placed together, create an image that is logical to examine.

Image source: PrintCNX

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

• Useful for non-lined images such as photographs or scans of artwork or detailed graphics.
• They have subtle hue or shades, but very blurred lines and forms.
• Due to their Pixel-based nature they suffer quality issues when blown in dimensions ( they become jagged and reveal individual pixels).
• They are identified and displayed at a certain resolution. It is calculated in dots per inches ( dpi).
• The higher the dpiis, the higher the resolution and the aesthetic impact of an image.
• Common raster formats for raster files include: TIFF, JPEG, GIF, PCX and BMP files.
• Raster images have become the Web standard, and they will be used in all images you can find on the internet.

As previously stated, JPEGs and even JPGs aren't vector images..

Image source: PrintCNX

Here's some information on vector images so you'll know the difference:

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• Images are created using mathematical formulas that define geometrical shapes such as lines, polygons as well as circles, curves and rectangles.
• Perfect for straight-edged photos like line art.
• Since there aren't any color gradients, they're ideal for flat image with uniform color.
• Use popular images such as logos, letterhead, and fonts.
• Scale up or decrease without any loss in quality as they don't depend on pixels to create the total.

2. Both Terms Mean the Same Thing

Remember when we spoke about the term JPEG and the way it stood in reference to the Joint Photographic Experts Group? Well, you guessed it; each JPEG along with JPG are abbreviations referring to that identical ISO sub-committee.

3. Both Are Used for the Same Image Types

Since they are raster photos as opposed to vectors, both .jpeg and .jpg file formats can be used for digital photography. Digital photographs feature a range of color variations which look seamless when stored as JPEG/Raster JPEG images. Visitors to your website will always be able to see a stunning photo when it's saved as a .jpeg/.jpg and uploaded to your site.

Learn more about image file types and their impact on your site.

4. Both Lose Some Quality When Saved

Because the .jpeg contrasts with .jpg comparison is ineffective ( because they are the same exact thing) Therefore, it is normal that the compression algorithm used for each format of file -- lossy compression-- will result in a decline in image quality as the file size of the image decreases.

This also means that no matter what file extension you use ( either .jpeg or .jpg), your image's file size will be smaller than it was originally and result in faster loading speeds when uploaded onto your website and viewers visit your site.

In the final analysis, JPEGand JPGs are the same and have several primary uses which include reducing the size of images for better web viewing and offer users a simple way to compress their images on saving and name the file with a standard file extension that is known by many.

If you ask yourself this question: JPG vs JPEG Which is superior? From there, you shouldn't worry too much as there is no difference. They're identical and any one you pick, is a matter of preference.

JPG vs JPEG 2000

If you've found yourself looking for information about JPEGs and JPGs, you may have come across the term JPEG 2000and wondered what in world it was. Since it's an option that is available in many editors for images.

JPEG 2000 was an image encoder system developed by the Joint Photographic Experts Group in 2000. The JPEG 2000 standard was designed to be better than the JPEG standard already in place. In reality, it was created to enable lossless compression for Images that utilize advanced compression techniques on a discrete wavelength transformation.

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It offered people a way to make their photos more efficient and save them as JPEGs, without degrading the quality of the image.

Here are some of the key features from JPEG 2000:

• Advanced Compression techniques:unlike typical JPEGs, JPEG 2000 was able to use lossy and lossless compression ( even on a single image file).
• Progressive Decoding:enables visitors to view an image with a lower-quality version of an image, even as the entire thing is still downloading on the background. As more data downloads, the image quality improves for the viewer.
• Higher Compression Ratioswhen it is lossy compression, JPEG 2000 can compress an image from 20-200 percentages over JPEG and still maintain the same quality of image when compared to the JPEG image with the same dimensions.

Additionally, JPEG 2000:

• Helps preserve transparency in images.
• This can be described in terms of bi-level, grayscale pallet-color, full-color image data.
• Unlimited amounts of private or special-purpose information in metadata.
• Can handle larger image sizes ( greater than 64K pixels), with no tilting.
• Ultra-low latency is particularly useful in live TV programming.
• Scalability of resolution as well as quality.

JPEG 2000 Limitations

Though JPEG 2000 is packed with wonderful features and may be the next most efficient standards for digital image coding However, there are reasons it is still not the most popular format for most people:

• No general browser support ( only supports Safari).
• Non-compatibility With JPEG ( must encode an entirely new standard and be compatible with the original JPEG).
• Coding JPEG 2000 files can be extremely CPU-intensive, which could stress servers and cause slowdowns.
• A lot of cameras and websites aren't ready for the format because it's not widely accepted.

Due to its limitations, you'll struggle to find an alternative to the JPEG 2000 file format as an option for saving your digital photos. While it's superior to JPEG, until it is widely accepted in the future, you'll likely run into a variety of compatibility issues which will make your job harder as a website owner than it needs to be.

Convert Image Files to JPG: Common Methods

There are plenty of ways to save your digital images as .jpg or .jpeg files. Let's take a look at a few.

1. Windows Paint

If you're using Windows you are able to save any image as a .jpeg or .jpg by using Windows Paint. Upload your photo to Windows Paint, go to the File menu, selectoption > Save as, choose the destination file, name your photo, and then select JPEG (*.jpg, *.jpeg, *.jpe, *.jfif)from the dropdown option.

Windows Paint

Then click "Save..

2. Affinity Designer

Affinity Designer is comparable to other image editing programs such like Adobe Photoshop. To save an image as an JPG using a tool like this, start by opening the application and uploading the image. Make any edits you want and click File> export.... Next, click on the JPEG icon, choose the quality ( best, high medium, or low) and click to export.

Affinity Designer

If you do this it, the save As dialog will open and you can pick a destination, name the image and verify that you are saving the image as a JPG.

"Save as" in Affinity Designer

Click Save.

3. Online Converter Tool

If you're interested in converting images to JPG there are plenty of free online tools for converting images to JPG to aid you. For example, FileZigZag is a free online file converter that's easy to use. Drag and drop your photo file or upload it select the type of file for the image to be converted the desired format, type in an email address, and click "Convert.".

Convert png into jpeg FileZigZag

Of course, you might not want to give your email for convert your image into JPG. This is why we've put together another set of premium and free alternatives for you to try out:

• XnConvert : perfect for advanced editors who require lots of image files formats, the capacity to batch convert, and to use Windows, Mac, or Linux.
• Zamzar :a free online tool that is ideal for users with larger image files ( up to 50MB) with the option to have the result emailed, or not.
• Adapter : a simple image converter , which can work with batch images. It also converts them quickly and works with macOS as well as Windows.

Of of course, these are only some of the available alternatives you can choose from if you are looking to convert images into JPG.JPG is not the same as JPEG What's the difference? What's with JPEG 2000? Get the answer (and more) in our detailed guide! CLICK TO TWEET

Summary

JPG as opposed to JPEG are the most popular extension of files and compression methods that allow users to save files and backup digital photographs. This is especially relevant for websites that wish to display attractive images as well as provide an outstanding user experience.

We're happy to inform you that it doesn't whatever you'd prefer .jpeg, .jpg or .webp kinds of files, you'll have the same result: beautiful images that load lightning fast for website users.

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