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Image Compression: Perfect Quality For Web Performance And SEO

Image Compression: Perfect Quality For Web Performance And SEO

Image compression makes your websites load so quickly even with lots of images.

Image compression is a clever technique used to reduce the file size of images while preserving their visual quality. It works by removing extra information and encoding the image in a more efficient way. 

The main purpose of image compression is to optimize storage space. As well as speed up loading times on websites.

In this blog, we’re going to learn all about image compression, types, and methods of image compression.

Types of Image Compression Techniques

Image compression has two types. They are lossless and lossy image compression. These types vary depending on the image file resizing process. 

Lossless compression

The lossless image compression technique refers to a process of resizing the images into a smaller version. It includes the methods to represent an image in a compact and efficient way without losing any information present in the original image. That means lossless image compression does not remove any part of the image.


  • The components of the image are preserved without alteration.
  • Maintains accurate image quality.
  • Allows for complete reversibility.


  • The generated image file size is excessive.
  • The decoding process poses a significant challenge.

Lossy compression

The lossy image compression techniques lose some of the image parts while resizing the images. It eliminates some parts that are not very essential. If you go through this method you will get a smaller version of an image with minimal quality difference. An added benefit is the enhanced loading speed. However, it’s important to note that lossy compression requires careful adjustment of the quality parameter. 


  • This option significantly reduced image sizes.
  • Ensures swift load times.
  • Making it an ideal choice for website optimization.


  • Remove image components.
  • It is not reversible.

How to Balance Image Quality with Website Speed.

Balancing image quality with website speed is essential for creating a seamless user experience.

One fundamental approach is optimizing image size. This means compressing images to reduce their file size and maintaining acceptable visual quality.

Choosing the appropriate image format is equally important. Different formats have distinct characteristics. JPEG is well-suited for photographs due to its ability to support millions of colors. On the other hand, PNG is ideal for images with transparency, such as logos or graphics with sharp edges.

Implementing responsive images is another effective technique. This prevents users from downloading unnecessarily large images on smaller screens.

These measures can balance between image quality and website speed. This ensures that your site provides an engaging and efficient user experience. 

The Impact of Image Compression on SEO

Image compression plays an important role in several aspects of Search Engine Optimization (SEO).

Image compression positively impacts SEO by enhancing page load speed. As well as user experience, mobile optimization, and various other aspects that search engines consider when ranking websites.

Here are some key impacts:

Page Load Speed:

Compressed images result in smaller file sizes, leading to faster page load times. This is essential for SEO. As Google’s ranking algorithm considers page speed as a ranking factor.

User Experience:

Faster-loading pages improve user experience. Users are more likely to engage with a website that loads quickly. It reduces bounce rates and increases conversions.

Mobile Optimization:

Compressed images reduce the amount of data that needs to be downloaded, making the website more mobile-friendly. Google’s mobile-first indexing also considers mobile page speed.

Reduced Bounce Rates:

Slow-loading pages can lead to higher bounce rates. So users leave a site quickly after arriving. Compressed images contribute to faster loading times, which helps retain visitors.

Reduced Bandwidth Usage:

Compressed images consume less bandwidth. It is beneficial for users with limited data plans or slower internet connections. This can improve accessibility and user satisfaction.

Image Search Optimization:

Compressed images can still maintain high visual quality. And make them suitable for image searches.

Recommended Image Formats for Web


JPEG stands for Joint Photographic Experts Group. It is a widely used image compression format. The format is designed for digital photographs and other images with complex color schemes. It employs a lossy compression algorithm. It discards some of the image data that is less perceptible to the human eye.


PNG is short for Portable Network Graphics. It is a widely used image file format known for its lossless compression capabilities. It was designed to replace older formats and provide better support for transparent backgrounds. This format is particularly well-suited for images with sharp edges, text, or areas of solid color.


GIF, which stands for Graphics Interchange Format. That is an image file format. And used for simple animations and graphics with limited color palettes. GIFs support up to 256 colors, making them suitable for images with a limited color range. Additionally, GIFs can include multiple frames, allowing for basic animations. 


Scalable Vector Graphics, abbreviated as SVG. SVG is an XML-based vector image format. SVG is ideal for graphics like logos, icons, and illustrations that need to be displayed at various sizes across different devices. They are often used for icons, logos, and simple web animations due to their ability to convey motion in a compact file format.


WebP is a modern image format developed by Google. It provides high-quality compression for images on the web. It uses both lossless and lossy compression techniques to reduce file sizes while maintaining good visual quality. WebP supports transparency (alpha channel) and animation. It is a versatile format for various types of images, including photographs, graphics, and animations. 

Tools and Techniques for Image Compression

Image optimization is an important step in web design. It is a highly effective approach to employ specialized tools designed for this purpose. These tools, whether in the form of software or accessible online, streamline the process by automatically implementing the most suitable compression methods. They operate based on the specific configurations and preferences you set. Among the well-known options in this category are Adobe Photoshop and GIMP. These offer extensive features for image manipulation and optimization. Additionally, services like TinyPNG, ImageOptim, and Squoosh have gained popularity for their user-friendly interfaces and efficient compression algorithms. 

Online image compression tools

Online image compression tools are web-based applications. It allows users to reduce the file size of images without the need for any software installation.

Here are some popular online image compression tools:

  • TinyPNG/TinyJPG: TinyPNG is an online tool. It employs smart lossy compression techniques to significantly reduce the file size of PNG and JPEG images.
  • Kraken: Kraken offers both free and premium plans for compressing JPEG, PNG, and GIF images.
  • JPEG-Optimizer: This tool allows users to adjust the compression level for JPEG images.
  • Compress JPEG: Compress JPEG is a simple online tool. It allows users to upload and compress JPEG images quickly and easily.
  • Squoosh: Developed by Google, Squoosh is a versatile web app. It supports various compression formats and allows users to compare different compression algorithms.
  • Optimizilla: This tool specializes in compressing JPEG and PNG images. It offers a user-friendly interface.
  • JPEG.io: A simple and user-friendly tool for compressing JPEG images with adjustable quality settings.
  • Compressor.io: Supports both lossy and lossless compression for JPEG, PNG, GIF, and SVG images.
  • Online Image Optimizer: Allows users to upload and optimize GIF, JPG, PNG, and BMP images.
  • TinyImage: Offers easy and efficient compression of JPEG, PNG, and GIF images.

Manual compression techniques

Manual compression techniques involve using image editing software or tools manually. This method adjusts parameters in order to reduce the file size of an image.

Here are some common manual compression techniques:

  • Resolution Reduction: This involves resizing the image to smaller dimensions. It can be done using software like Adobe Photoshop or GIMP.
  • Adjusting Quality Settings: Most image formats, like JPEG, allow users to adjust the quality level during compression.
  • Color Reduction: Reducing the color palette to a smaller set can significantly reduce file size. This is effective for images with simple graphics or illustrations.
  • Crop Unnecessary Elements: Removing unnecessary parts of an image can reduce file size. This is especially useful when there are areas in the image that do not contribute to the overall composition.
  • Applying Filters and Effects: Applying filters or effects. Such as blurs or artistic filters, can sometimes lead to a reduction in file size.
  • Removing Metadata: Removing this data can reduce file size, although it may not result in a significant reduction.
  • Using Dithering Techniques: Dithering introduces a pattern of noise to simulate additional colors. It can reduce the number of unique colors in an image and decrease file size.
  • Adjusting Compression Ratios: A higher compression ratio will result in a smaller file size but may lead to a reduction in quality.
  • Choosing a Different File Format: Depending on the image content, converting it to a different format (e.g., from PNG to JPEG) can result in a smaller file size.
  • Saving in Progressive Format: Some formats, like JPEG, offer a progressive option. It allows the image to be displayed gradually as it loads.

Image Compression with a  Plugin 

Now it’s time to talk about an effective image compression plugin. Almost all online platforms are WordPress site-based. So, all the images are being inserted through a WordPress website. 

In this situation, when a user needs to insert an image, it has to compress the images individually through online tools or manually. It is a time-consuming and very complex task as every website requires a huge number of images. 

To solve these issues, as a user, you can install and access such a plugin that can provide your full support regarding image compression. 

If we think about the features and functions then Next3 Offload will be the best plugin for you. It is an offload media plugin for WordPress. But at a time the plugin serves the image compression functionalities. This feature is a new edition in Next3 Offload. 

The amazing feature of Next3 Offload makes your task more easy and less time-consuming. You don’t have to search for particular image compression tools. Just enable the features and enjoy the flexibility. 

Let’s see the feature’s backend portion.

Image Compression

You can compress each of the inserted images with the help of image compression. The images don’t need to be individually compressed before being added to your site. To begin the image compression process, enable the feature. 

Go to the Optimization section to activate the necessary options for automatic image compression without any support from other websites. 

WebP image Converter

You can make your website more efficient by utilizing the next-generation image format, WebP, which is compatible with modern browsers. This format reduces the size of images maintaining their quality.

To convert your photos to WebP format without compromising quality, go to the Optimization section in the menu. This will help optimize the performance of your website.

Final Thought 

Image compression can provide a speedy website. As it creates more space in storage. So that a website can become more lightweight. 

To compress images and enjoy the facilities of image compression, as a user you must know the details about image compression and ways of image compression. 

To make the image compression process easier and less time-consuming you can access a plugin. An effective plugin can smooth your image compression task and make your website more organized.

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Mehrin Ferdous Meem
Written by

Mehrin Ferdous Meem

Mehrin is a content writer of ThemeDev who prefers to write about tech products, travelling, health, food, lifestyle, marketing, technology etc. She also works for creating video. She has completed her Bachelor's degree in Computer Science and Engineering. Her hobbies include blogging, reading, cooking etc.

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