AVIF is an open image file format based on the AV1 video compression standard. This means it offers significantly better compression than popular JPEG or PNG formats, allowing it to store smaller images while maintaining high quality. Consequently, it also speeds up website loading. Every AVIF file is supported by select web browsers.
AVIF Extension – What is it?
AVIF , or AV1 Image File Format, refers to an image file format that stores AV1-compressed images in the HEIF file format . Developed by the Alliance for Open Media, it is a worthy successor to JPEG and an alternative to WebP . It is typically used for graphics on websites, where high quality and good compression are crucial. AV1 compression technology allows the creation of images composed of multiple layers , supporting a wide color gamut, including HDR and BT.2020.
Maintaining high image quality while keeping the overall file size smaller is one of the invaluable advantages of the AVIF extension . Therefore, it can be considered a future-proof solution for streamlining image publishing on the web.
AVIF file and its use on websites
The file size of a website's content affects its loading speed and performance. The smaller the file size, the easier and faster browsing. The AVIF format was created to reduce bandwidth and data consumption and quickly became a recognized innovation in digital image compression.
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The use of AVIF files on the website will affect, among other things:
- better compression, so images take up less space on the server;
- higher image quality AVIF file retains more image details, which affects the perception of the content;
- faster image loading;
- reducing website bandwidth usage websites and applications.
AVIF vs WebP – the most important differences
Until recently, WebP was considered one of the most advanced image compression codecs, but now a worthy alternative has emerged – AVIF . Both formats provide excellent image quality while maintaining a small file size, but they differ in several aspects.
AVIF is based on the AV1 video codec , while WebP is based on the VP8 codec . The former supports transparent backgrounds and the HDR photo format and can store a series of animation frames . The latter supports lossy and lossless compression, including transparency , supported in animated WebP images.
Quality and Compatibility – AVIF vs WebP
Google studies show that AVIF can reduce file size by as much as 50% compared to JPG and by 20–30% compared to WebP while maintaining similar image quality. This is crucial for website loading speeds and preserving the quality of shared multimedia.
Despite this, AVIF isn't as widespread as other formats. The WebP file is compatible with many web browsers, including Google Chrome, Firefox, and Opera, and is therefore widely used. However, the AVIF file initially only worked with the latest browsers, which led to its even less widespread adoption. Despite the advantages of these formats, the most commonly used file extensions remain PNG and JPEG.
Adapting an image to different browsers – how to do it?
The limitations caused by the low popularity of the AVIF format and the lack of support in some web browsers can be overcome by using the HTML <picture> tag . This tag allows for different versions of an image to be displayed on different browsers, devices, and even displays. This method allows an AVIF file to be served to users whose browsers support the format, while providing an alternative for others.
When to choose AVIF and when to choose WebP?
In the AVIF vs. WebP competition , it's difficult to pick a single winner. Both formats offer many advantages, but also have a few limitations and are suited for slightly different purposes.
The AVIF format undoubtedly offers more effective compression , which allows for faster page loading, contributing to better results. Properly optimized graphics, in turn, positively impact website SEO . AVIF files are therefore primarily suitable for applications and websites where compression is crucial.
In turn, the WebP format is still a popular solution for social networking sites, as well as for websites where we want to use lossless compression.
AVIF and its use in animation
A significant advantage of the AVIF format is its support for GIF-like animations and transparency . This makes it an excellent choice for graphics, logos, and infographics, where high image quality and visual appeal are crucial. The AVIF format enables the creation of animations and so-called live photos, and also supports multi-channel and monochrome images.
AVIF also allows for the display of images with rich color and dynamic range, maintaining the appropriate range of light and dark tones and a wider range of luminance. As mentioned, this format enables the creation of images with HDR effects and a wide color gamut.
AVIF format limitations
The AVIF format also has several limitations, primarily related to its handling. It's worth mentioning the lower level of browser support for AVIF , which contributes to difficulties in its use and distribution. Another significant issue is the cost of encoding, which can be as much as 8–10 times more expensive than JPEG encoding . This is due to the advanced compression technique and complexity of the format.
Among the limitations of the AVIF format is the lack of support for progressive rendering , which involves loading an image line by line, from top to bottom, until it is fully displayed. This feature is available only in JPEG and WebP image formats, so users have become accustomed to this method of displaying images on the web over the years.
Summary
The above article covers the following topics:
- What are the characteristics of AVIF?
- Using AVIF in web development
- Comparison: What is the difference between AVIF and WebP?
- AVIF vs WebP: Quality Standards and Browser Support
- Cross-browser image deployment
- When to use AVIF and when to use WebP?
- Technical limitations of the AVIF format
