Comparing Lossless JPEG-XL vs. PNG: What are the differences?

I am seeking a comparison between two image formats: Lossless JPEG-XL and PNG. Both formats are renowned for maintaining image quality without introducing compression artefacts.

The purpose of my inquiries is to better understand the differences between these formats so that I can make knowledgeable decisions for a variety of use cases, such as web design, where image quality and file size are important considerations.
I may use this comparison to decide whether format could be better suited for particular projects or applications, taking into account things like image quality and compression effectiveness.


JPEG-XL is a good option if your primary concerns are effective compression and small file sizes while preserving good image quality, and you are certain that the browser will support it.

When it comes to fine control over transparency, wide compatibility across various devices and browsers, and a reliable format, PNG continues to be a solid choice.

Now, let us dig into a detailed comparison.

1. Compression Technique


JPEG-XL use no loss a cutting-edge compression method created to effectively encode image data. It is quite good at finding similarities and patterns in the image content while maintaining all of the original image information.
As a result, compression efficiency is improved over previous JPEG standards.


On the other hand, PNG uses the DEFLATE compression method, which is very good at compressing text, simple graphics, and images with crisp edges. While DEFLATE is effective for some image kinds, JPEG-XL can be a better option for complicated photographic content.

2. Ratio of Compression


When compared to PNG, lossless JPEG-XL typically achieves better compression ratios because it preserves the same degree of image quality while creating files with lesser sizes. Due to this, it is a better option in scenarios when reducing file size is essential.


Although lossless compression is a feature of PNG, it might not always achieve the same compression efficiency as JPEG-XL. Although it works well for some image kinds, photographic content may have greater file sizes as a result.

3. Image Quality


No loss JPEG-XL is designed to maintain the original quality of images without sacrificing any quality as, it can handle a variety of image formats, including graphics and photos, and retain accurate colors, contrast, and fine details.


PNG is well known for its ability to preserve picture quality without any degradation, especially when it comes to text, simple graphics, and images with crisp edges. It is excellent at protecting this kind of content while maintaining the integrity of the images.

4. Transparency


No loss both opaque and alpha channel transparency are supported by JPEG-XL. Because of this, it’s a great option for images with different levels of transparency and gives web developers and graphic designers a lot of freedom.


PNG is well renowned for its ardent advocacy of openness. It has an alpha channel that lets you adjust the transparency of the image precisely which makes it a useful tool for graphics and photographs that need transparent backgrounds.

5. Support for Browsers


Browsers are gradually gaining support for JPEG-XL, particularly the lossless form. Even though more people are using it, not all web browsers may currently support it to the same extent. Developers should select the format after taking the browser landscape into account.


PNG is widely supported by all of the main operating systems and web browsers. It is regarded as a secure and dependable option for web graphics and images that must work across many browsers and platforms.

6. File Format and Compatibility


JPEG-XL is a more recent image format that promises to provide excellent photos with effective compression. Although its use is growing, it might not be as widely accepted as more traditional and established formats.


For a considerable amount of time, PNG has been a common image format. It is extensively supported by a wide range of web environments, platforms, and software applications. PNG is a trustworthy option for cross-platform interoperability because of this.

7. Use Cases


No Loss JPEG-XL is adaptable and good for many different applications. It works particularly well with photographic photos, graphics, artwork, and high-quality photographs when it’s important to reduce file size without sacrificing image quality.


PNG is especially recommended for images that need line art, logos, translucent backgrounds, and sharply edged graphics. For web graphics, it is a common format, particularly where wide browser compatibility is required.

In conclusion, PNG and Lossless JPEG-XL are useful formats for preserving image quality during compression without experiencing any loss. The particular use case, preferences for compression efficiency, and the requirement for cross-browser and cross-platform compatibility all influence which of the two formats is used. PNG is a dependable format recognized for its wide compatibility and robust support for transparency, even if JPEG-XL offers superior compression efficiency. The choices you make should be in line with the particular needs and objectives of your project.

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Got it! but in terms of storage and bandwidth optimization, which format would be more suitable for a website with a large number of high-resolution images: JPEG-XL or PNG?

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Hey Reena,

JPEG-XL is typically a better format than PNG for optimizing storage and bandwidth for a website that has a lot of high-resolution images. This is the justification:

1. Compression Efficiency

Because JPEG-XL has better compression efficiency than other formats, it can save a large amount of high-resolution image files without sacrificing quality. The benefit of this file size reduction is especially noticeable when you need to store and distribute a lot of photographs online.

2. Faster Loading

Web pages load more quickly when file sizes are less. Ensuring a seamless user experience is imperative, particularly for mobile devices and areas with restricted internet access. Quick access to and viewing of high-resolution photos is possible for users.

3. Decreased Bandwidth Usage

Because of its effective compression, JPEG-XL uses less bandwidth while sending photos to consumers’ devices. This can lower hosting costs and boost overall performance, which is advantageous to both website owners and users.

4. Browser Compatibility

Although browser support for JPEG-XL is still developing, it is becoming more and more common. Major browsers were starting to add support for JPEG-XL as of my latest update in September 2021, making it a useful option for web use.

5. High-Quality Output

Crucially, JPEG-XL may accomplish these benefits without sacrificing excellent image quality. It can preserve high-resolution photographs’ fine details, vibrant colors, and overall eye-catching appearance.

Nevertheless, PNG is still a great option for images that need to be transparent or have exact control over certain image features, such logos or graphic elements with distinct edges. If your website has these kinds of images, your best bet might be to use JPEG-XL for photos and PNG for transparent graphics.

The final decision between JPEG-XL and PNG should be made based on the particular needs and picture asset composition, as well as the browser compatibility of your target audience.

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Thank you Gumlet community for solving my query.

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For more information checkout this blog written by our team: JPEG-XL: Our next 20 year bet - Gumlet