As the demand for visuals on the web continues to rise, it is vital to ensure that they are optimized in order to provide a better user experience. Image optimization reduces the file size, leading to a seamless uploading process without affecting the quality.
In this article, we will guide you through the various techniques and tools you can use to optimize images for the web. With these practices, you will be able to improve the performance of your website's performance and overall user experience.
Benefits of Optimizing Images
There are several benefits of adjusting high-quality images to appropriate resolution and dimensions. To start with, it enhances the speed and functionality of your website. This leads to an efficient browsing experience for the visitors and improved SEO rankings.
Additionally, optimizing images makes your website lighter in storage, leading to less backup time. Furthermore, the chances of your visitors' browsing time increase.
When optimizing images, remember that images are adaptive on different screen sizes. Most people now use their smartphones to browse the net. Therefore, it's essential to ensure the mobile-friendliness of your images so every user has the same experience.
Now let's take a look at some ways to optimize images for the web.
Understanding Image Types
Digital images are categorized into:
- Vector
- Raster
Vector Format
Examples of vector format include:
- SVG
- AI
- EPS
A vector format is made up of graphics such as points, shapes, lines, and curves. They are based on mathematical formulas. The best part of optimizing a vector image is that its quality remains unchanged no matter how large or small the image is resized.
Raster Format
Examples of common raster formats are:
- JPEG
- PNG
- GIF
- RAW
- WebP
Raster images are typically used for photographs. They consist of pixels of a unique colour and tonal information. Being pixel based, raster images are resolution-dependent. This means that when resized, the raster images lose their quality and come as blurry images.
Choose File Formats
After you select the type of picture you will be using, it's time to decide the format for your visuals. The right format can balance the file size of your image and ensure they load quickly on any given device. The most common file formats include:
JPEG
JPEG is an extremely popular file format because it is supported by all web browsers. Being small in size means they only take up a little disk space. This leads to fast load time. They also work well when it comes to preserving colours. But, its biggest disadvantage is that while having a small file size - the picture eliminates some data every time it is edited. This is why you should avoid using JPEG formats when requiring continuous adjustments, especially if they contain text. With constant edits, these texts will become hard to read.
GIF
GIFs also being small in size helps to load your site faster. They are just 8-bit images that show only about 256 colours. This means that GIF images are not of high quality. However, they are a useful format for creating animations and ad banners.
PNG
PNG images can have up to 256 colours, and they partially support transparent images. They are more efficient in capturing colour information than GIFs. They also display higher-quality images than JPEG. Plus, the PNG file format works well when there is a lot of text in the image, such as infographics, logos, screenshots, and banners. The biggest disadvantage of PNG is that they have a large file size and can slow down a website.
WebP
The WebP image format is developed by Google and helps reduce the fie size while maintaining quality. When using the WebP format, you can choose to save the file with either lossy, which eliminates some data or lossless, which retains all data during compression. According to Google, the advanced coding algorithms of WebP format creates file sizes that are 26% smaller than PNGs and 30% smaller than JPEG. The WebP supports transparency and animations. The only drawback of WebP is that it is a relatively new format and is not compatible with leading browsers like Internet Explorer and Apple Safari.
Use Tools to Resize Pictures
The image formats mentioned above all display a static image consisting of a defined position, colour, and proportion. Stretching them to fit your web layout will make them blurry and pixelated. On the other hand, a small size image will display a distorted and fuzzy image.
The whole idea of image optimization is that the pictures retain quality. For this reason, we recommend using photo editing software to resize images and adjust pixel dimensions. This works since the image can fit well in the space provided without sacrificing quality.
To learn more about optimizing images, check out these graphics design tips for beginners.
Compress Images
If your digital image files are still heavy in size, you can compress them so they take up less space. The best way to do this is to use a compression tool like TinyPNG. The tool is free to use and processes images automatically after you upload them. This way, there is no need for any manual intervention from your side.
Another way to compress images on a WordPress site is to install a compression plugin. Several tools are available in this regard and can help you compress bulk images, saving you a lot of time.
Use Correct Image Dimensions
Image dimensions are referred to the width and height of the image based on its pixels, whereas image size refers to the disk space it uses. Image dimensions depend on their purpose. Not using the correct dimensions will make your image appear distorted.
Here are the general guidelines for image dimensions:
- Hero image for website: 1280 x 720 pixels
- Background image: 1920 x 1080 pixels
- Blog image: 1200 x 630 pixels
- Logo (rectangle): 250 x 100 pixels
- Instagram posts: 1080 x 1080 pixels
- Facebook posts: 1200 x 628 pixels
- Youtube thumbnail: 1280 x 720 pixels
Keep these recommendations in mind to ensure your pictures fit the layout perfectly and load seamlessly.
Use Content Delivery Network (CDN)
A CDN or a Content Delivery Network can also be utilized to upgrade your website performance. A CDN specializes in converting, optimizing, and providing a global reach. It has a network of data centers. They work like an API network that modifies images and distributes them faster from servers nearest the visitor's location. This lessens the page load time while maintaining your image's quality.
Write the Image's Alt Text
Also known as alternative text, the alt text or alt tag is a short description of images. It is displayed when a picture is taking too long to load for any reason. During this time, the visitor can understand what the image is about. By knowing the image's content, they can decide if they want to wait for the picture to show up.
Another benefit of alt text is accessibility. It provides a textual description of an image to visually impaired audiences who are viewing the webpage through a screen reader. Search engine algorithms also use the text to understand your page and index it accordingly. This helps direct traffic to your website when the visitors search for an image - leading to more business.
Conclusion
Remember the importance of image optimization whenever you are working on images for a website or social media. It doesn't matter how good a website developer you have hired when your images are not optimized.
The modern world is swiftly drawn toward visual content. So image optimization is one of the key factors in improving website performance. Also, with optimized images, your visitors will associate your business with quality and instill their trust. Good luck!