AVIF is a modern image format designed to deliver high visual quality with smaller file sizes. It can be a useful alternative to traditional formats such as JPG and PNG, particularly when you want to reduce image weight without sacrificing too much detail.
You may encounter AVIF images when browsing websites, downloading pictures, or optimizing images for faster page loading. However, you might also find that some image editors or older devices cannot open them easily.
In this guide, you will learn what an AVIF file is, how it works, its main advantages and disadvantages, which browsers support it, and when converting AVIF images to another format makes sense.
What Is an AVIF File?
AVIF stands for AV1 Image File Format. It is an image format based on the AV1 video compression technology and is designed to store images efficiently.
An AVIF image can often provide a smaller file size than a comparable JPG or PNG image while preserving good visual quality. The actual result depends on the original image, compression settings, image dimensions, and the format used for comparison.
AVIF supports both lossy and lossless compression, transparency, high color depth, and animated image sequences. These capabilities make it suitable for a range of uses, from website photography to graphics that require transparent backgrounds.
AVIF files typically use the .avif extension.
How Does AVIF Work?
AVIF uses AV1-based compression techniques to reduce the amount of data needed to represent an image. Instead of storing every visual detail in the same way as an uncompressed image, the compression process represents image information more efficiently.
When using lossy compression, some image data is discarded to reduce file size. With lossless compression, the original image data can be preserved, although the resulting file size may be larger.
This balance between file size and image quality is one reason AVIF is useful for websites, online publishing, and image delivery.
Advantages of the AVIF Format
1. Smaller image file sizes
AVIF can compress images efficiently, sometimes producing significantly smaller files than JPG or PNG at a similar visual quality level.
Smaller images can reduce the amount of data visitors need to download, which is particularly helpful on mobile connections and image-heavy pages.
2. Good visual quality
AVIF can retain fine details and color information at relatively low file sizes. This makes it a useful option for photographs, product images, banners, and other web visuals.
However, the best results depend on the image and compression settings. Always compare the converted image with the original before publishing it.
3. Transparency support
Like PNG and WebP, AVIF can store transparency. This makes it suitable for certain logos, overlays, product cutouts, and graphics that need a transparent background.
If you convert an image to another format, check that the destination format and conversion settings preserve transparency when you need it.
4. Support for high color depth
AVIF can represent images with higher color depth and a wider range of colors than many common web image workflows. It also supports HDR-related image features.
These capabilities can be useful in photography and specialized visual applications, although not every image viewer or editing program supports every AVIF feature.
5. Useful for website performance
Using smaller images can help reduce page weight and image download times. AVIF may therefore contribute to a better website experience when it is implemented and compressed appropriately.
It is not a complete performance solution on its own. Image dimensions, responsive image delivery, caching, lazy loading, and other page optimizations still matter.
Disadvantages of AVIF
AVIF has several benefits, but it is not the ideal choice for every situation.
1. Older software may not support it
Current versions of major web browsers support AVIF, but older browsers, operating systems, image viewers, and desktop applications may not.
If an image will be shared with people using different devices or older software, JPG or PNG may be a more convenient choice.
2. Editing workflows can be less convenient
Some image editors and applications may require an update, an additional component, or a different workflow to open or export AVIF files.
Compatibility also varies by application and operating system, so check the software you intend to use.
3. Conversion can take additional time
Encoding and decoding AVIF images can require more processing than some simpler image formats, depending on the software, image dimensions, and settings.
For a single image, the difference may not matter. For a large batch of images, processing speed can become an important consideration.
4. Compression does not always produce the best result
AVIF does not automatically produce a smaller file in every case. Results depend on the source format, compression settings, and image content.
A highly optimized JPG or WebP image may sometimes be smaller or more suitable for a particular use. Compare the final file size and visual quality rather than assuming one format always wins.
5. Fallbacks may still be necessary
Although AVIF browser support is now widespread, older devices and certain embedded browsers may not display it. Websites that need broad compatibility should consider providing an alternative image format.
Does AVIF Have Browser Support?
Yes. AVIF is supported by current versions of major browsers, including Google Chrome, Mozilla Firefox, Microsoft Edge, Safari, and Opera. However, support depends on the browser version and, in some cases, the operating system.
The following table lists the versions in which support was introduced or became fully available.
| Browser | AVIF support |
|---|---|
| Google Chrome | Version 85 and later |
| Mozilla Firefox | Version 93 and later |
| Microsoft Edge | Version 121 and later |
| Safari | Full support from version 16.4; some earlier versions had partial support |
| Opera | Version 71 and later |
These are historical support milestones, not recommendations to use those old browser versions today. Older browsers, legacy applications, and unsupported embedded environments may still have compatibility problems.
For the latest compatibility details, consult the MDN image format guide or the Can I Use AVIF compatibility table.
How can websites support visitors using older browsers?
If your website uses AVIF images, you can provide a WebP or JPG fallback. The HTML picture element allows the browser to select a format it supports.
For example:
<picture>
<source srcset="photo.avif" type="image/avif">
<source srcset="photo.webp" type="image/webp">
<img src="photo.jpg" alt="Description of the image">
</picture>Replace the example filenames and alt text with the actual image details. The JPG file acts as a fallback if the browser cannot use the preferred formats.
AVIF vs JPG vs PNG vs WebP
Choosing an image format depends on what you need the image to do.
| Format | Main advantage | Potential limitation | Best suited for |
|---|---|---|---|
| AVIF | Efficient compression and modern image features | Some older software may not support it | Optimized website images and modern image workflows |
| JPG | Broad compatibility and good photographic compression | Does not preserve transparency | Photographs and everyday image sharing |
| PNG | Lossless image storage and transparency | Files can be relatively large | Screenshots, interface graphics, and transparent images |
| WebP | Efficient lossy and lossless compression with transparency support | Older software may lack support | Website images and graphics |
There is no universal winner. AVIF is worth considering when file size is important, JPG is convenient for broad compatibility, PNG works well when lossless image data or transparency matters, and WebP is another strong option for web delivery.
When Should You Use AVIF?
AVIF can be a good choice when:
- You want to reduce the file size of website photographs.
- You are optimizing image-heavy pages.
- Your website visitors generally use modern browsers.
- You need transparency or higher color-depth features supported by your workflow.
- Your image delivery system can generate suitable fallback formats when necessary.
You may prefer JPG when sharing an image with someone who needs straightforward compatibility with older programs. PNG may be preferable for screenshots or graphics where lossless detail and transparency are important.
For websites, test your images before replacing every existing file. A smaller file is useful only if the image still looks good and displays correctly for your audience.
How to Convert JPG to AVIF
If you have a JPG image and want to try the AVIF format, you can convert it using FileNivo’s online image conversion tools.
- Open the JPG to AVIF converter.
- Select the JPG image you want to convert.
- Follow the converter’s on-screen instructions.
- Download the converted AVIF image.
- Check the file size and visual quality before using it.
Conversion results vary depending on the source image and the settings available in the tool. Keep your original file if you may need to edit or reconvert the image later.
How to Convert AVIF to WebP
If an AVIF image does not fit your workflow, WebP can be a useful alternative for websites and supported applications.
- Open the AVIF to WebP converter.
- Choose the AVIF image you want to convert.
- Follow the available conversion steps.
- Download the WebP file.
- Open the converted image and confirm that its appearance is acceptable.
WebP also supports transparency and can offer efficient compression, but the final file size and quality depend on the conversion settings.
Frequently Asked Questions About AVIF
Is AVIF better than JPG?
AVIF can provide smaller files at comparable visual quality in many situations, but the result depends on the image and compression settings. JPG remains useful when compatibility with older software and devices is a priority.
Is AVIF better than WebP?
Neither format is always better. AVIF can achieve efficient compression, while WebP offers strong web performance and broad support in modern browsers. Compare file size, visual quality, compatibility, and your website’s needs before choosing.
Can I open an AVIF file in Windows?
Support depends on your Windows version and the application you use. If your image viewer cannot open an AVIF file, try an updated application that supports the format or convert the image to JPG or PNG.
Does AVIF support transparency?
Yes. AVIF supports transparency, making it suitable for images that need transparent areas. Confirm that your chosen application and conversion settings preserve the transparency channel.
Does converting JPG to AVIF reduce quality?
It can. JPG is generally a lossy format, and converting it to AVIF with lossy compression may introduce additional changes. Keeping the original JPG is recommended if you want to avoid losing access to the source image.
Can I convert AVIF back to JPG or WebP?
Yes. AVIF images can be converted to JPG or WebP using compatible software or an online converter. The output quality depends on the original image and conversion settings.
Is AVIF suitable for every website?
Not necessarily. AVIF can be useful for performance-focused websites, but you should consider your audience, image workflow, and compatibility requirements. Providing WebP or JPG fallbacks can help support older environments.
Final Thoughts
AVIF is a modern image format that combines efficient compression with features such as transparency, high color depth, and animation. It can help reduce image file sizes, but compatibility and conversion quality still deserve attention.
For website owners, the practical approach is to test AVIF against JPG and WebP using real images, then choose the format that offers the best balance of file size, appearance, and browser support.
If you want to experiment with AVIF, try FileNivo’s JPG to AVIF converter. If you already have an AVIF file and need a different format, use the AVIF to WebP converter.