Having a fascinating, clear and fast loading image is one of the most effective ways to attract users/customers. It is a reason for automobile dealers to spend a lot of time ensuring that the new models are not stained and sparkling.
The visual impact of the product can usually determine the success or failure between success or failure. The online display room is no exception. In addition, how the image affects the complexity of the loading speed. This is a wide and famous indicator. If the loading time exceeds 3 seconds, the user will leave the website. If the loading time of a website does exceed 3 seconds, the pictures on your website are likely to be part of the reason.
Therefore, as the owner of the WordPress website, what you can do to ensure that the pictures on your website can attract users and make your website quickly loaded.
Your initial intuition may only reduce the image from 1800 × 1400 images to 300 × 200 images. This will be a wrong way, because although your image file size may be much smaller now, the image quality and user experience will be affected. For example, if you have a car display room sales website, customers will want to understand the car well and see all functions and details. By making the image so small, it is impossible to conduct any detailed inspection of the car -this makes potential customers feel frustrated and turned elsewhere.
So what do you have?
Fortunately, you can choose dozens of different image file options from high -quality but large file size BMP, long -tested JPEG to wide -known new WebP formats. In addition to selecting the correct format, it is important to remember that no matter which format you choose, you can use wp-opptimize to be called \” The process of compression reduction to reduce the size of the image file. The website speed is one of the top ten most important factors observed when the Google Robotics who climbed your website in the search results.
Poor loading speed will seriously affect the ranking of your website, and it is easy to bring your website from the homepage to being indexed by Google.
Google ranks very strictly on how they rank on the search algorithm. If they find that the website provides a bad user experience due to the slow loading time, they may not even worry about climbing it and through Google Search found it.
Which image format should you choose?
Because high -quality images are very important for any modern WordPress website, you need to know which format use, how they affect your website performance, and how to make full use of your files to select Essence
The two most popular website image file formats are PNG and JPEG/JPG.
According to
W3Techs
, more than 70% of the websites use these file types. About 30% of the website uses SVG and 22% use GIF. This is where the type of image file type plays a role, because the type of file you use to upload images plays an important role. Because there are many different file types, we will introduce the most popular file types and its advantages and disadvantages below:
Before we enter the file type, we You need to understand some concepts first, such as grating image and bitmap image? What is compression? What is the difference between damage compression and lossless compression?
Compression -loss and loss
[ [] 123] These two types of compression are designed to reduce file size, but what is really important is the content they delete. During loss of compression;
Delete important data related to image quality.
In some cases, this may be reflected in pixel -based images, because your computer may not be able to rebuild images.
In non -destructive compression, the unrelated data (such as metadata) in the image is reduced, which helps reduce the size of the file. In the process, the quality of the image was completely unsolved. Gallery and Vector
The most commonly used image file types are usually based on grating. This means that they have a fixed RGB color value associated with each pixel, and all these pixels are combined and used to create the entire image.
Examples of such file formats include JPG, PNG, and GIF.
Or, the use can be reduced infinitely without being created by the shape and lines that will not be created by pixels. The vector was created by mathematical formulas, allowing users to change the value without affecting the quality of the image.
Now we have already understood the basic knowledge of the image. Now you can view differently Details of file type.
JPEG: This is a digital image format containing compressed image data.
The JPEG image using the 10: 1 compression ratio is very compact.
The JPEG format contains important image details. It is the most popular image format of sharing photos and other images on the Internet.
The size of the small files of JPEG images can also allow users to store thousands of images (such as on art websites) without adding additional storage space on your website.
JPEG is a type of loss compression files suitable for photos, but it is recommended that you use another format when processing the graphic, such as PNG.
JPEG image file example. When uploading, you can see that the details and quality are maintained. PNG:
PNG is a popular bitmap image format, which is an abbreviation of \”portable graphic format\”.
This format was created as an alternative format for graphic exchange format (GIF). 
PNG has some great functions, such as including 24 -bit RGB color panels, grayscale images, and display transparent background.
When processing high -quality images or graphics, the lossless data compression method is also used for PNG images.
PNG images are also often used in image editing because they can provide users with more image control and options than traditional JPEG formats.
PNG also uses non -destructive compression algorithms, which means that this format can Keep more data than JPG. When using PNG image files, users can also save these images into a transparent background.
By using this format, users can choose to use layered images that can display clear backgrounds (for example-only the flowers in the figure below instead of the background wall). It cuts off and removes the existing background -like using JPEG images. This is one of the main reasons why it is the first choice for graphics and illustrations. As we all know, PNG is more popular with users who use graphics, rather than upload standard photos.
PNG image is maintained high -quality, and at the same time allow you ] You may know the word \”GIF\” the best in the countless short videos sent on the message application. GIF 代表“Graphics Interchange Format”，主要用于支持没有音频的动画
[ 123]
Different from JPEG and PNG, GIF is used for more niche situations, usually not for static images (although this is possible).
If you use GIF on the WordPress website, it is likely to display simple animations or processes to the visitors. The color range of GIF is limited, which is most suitable for simple graphics.
They use non -destructive compression and are often smaller than JPG. It is generally recommended that you use GIF cautiously at your site, because they will increase the loading time (considering the size of the file) and limit it to 256 colors.
Example of GIF image. In order to make animation, the quality of the original image greatly reduces the quality of the original image. SVG:
Activity vector graphics (SVG) is a network -friendly vector file format. Unlike pixel -based grating image files such as JPEG, vector textPieces store images based on dots and lines on the grid. This means that vector files like SVG can significantly adjust the size without losing any quality, which makes it an ideal choice for the logo and complex online graphics.
The vector is only suitable for simple graphics, shapes and illustrations.
SVG is a good choice for the logo, especially if you need your logo with response and most browser support, including Chrome, Firefox, Edge and Opera.
The SVG format for the logo for the migrant sunflower example. BMP:
bitmap is now considered an outdated image format. BMP loads images in a non -destructive image format. Due to lack of compression, this may lead to large files. Considering the importance of loading speed and how the websites hope to keep the image size at the lowest (not to mention the popularity of SVG and JPEG format), this format is largely used to largely use it anymore In online images.
When uploading in BMP format, the original quality of the image remains unchanged, but the size of the file will seriously reduce your website speed and it is not recommended.
网页版： [123 ] This image format was created by Google in 2010 and began to be welcomed by people who upload a large number of images to their website, because it has multiple advantages compared to JPEG and PNG, such as better damage and non -destructive compression compression performance.
In view of the compressed performance of WebP improvement, it is usually uploaded in the size of a file with a smaller file than a JPEG or PNG format, and it will occupy less space on your website-to load it speed Fast.
Although not all browsers support it, all the most popular browsers support it -including Chrome, Firefox, Edge and Opera.
Although not as widely known as JPEG and PNG, webp may be successfulFor the preferred image format in the future. Conclusion:
You can use a variety of image formats on your WordPress website, but the important thing is to evaluate the purpose of the image.
For example, if your website is designed for wedding photographers, you will want to maintain high -quality images, which can still be loaded quickly and user friendship (
jpeg ))))))) Essence
However, if you sell images in the online poster store, then you will want to retain as many details and image information as possible ( png ).
as the rules of the general experience, if you are just for you Online stores, blogs, investment portfolios, social media or social media websites upload standard images. It is recommended that you upload images in a standard JPEG format, and then use WP-Optimize to further compress your image
However, if you want the image to adapt to the future and improve the loading speed as much as possible, then webp can provide excellent damage and lossless compression, while maintaining high levels of details. No matter what you decide, remember to use WP-OPTIMIZE to compress your image always to achieve market-leading compression.
