AVIF is a modern image format that promises smaller files and high visual quality. It is increasingly used on websites, in image libraries and by image editing tools. At the same time, AVIF has collected several myths. Some people assume it always produces the smallest file, while others believe it is too slow or unsupported to use seriously.
The reality depends on the source image, encoder settings, browser, device and the way the file will be delivered. AVIF can be an excellent choice, but it is not automatically the best format for every image or every visitor.
This guide explains the most common AVIF misconceptions in simple terms. It also covers quality, compression, transparency, animation, browser support, performance and practical conversion choices.
What AVIF is and where it comes from
AVIF is an image file format based on the AV1 video codec. AV1 is a modern open video compression technology developed for efficient delivery of video on the web. AVIF uses the image-compression parts of AV1 for still images, and it can also store animated image sequences.
Like JPEG, WebP and PNG, AVIF is a container for image data. The file extension is usually .avif. The format can store lossy images, where some visual information is removed to reduce the file size, and lossless images, where the original pixel data is preserved.
AVIF also supports features that matter to modern photography and design. These include transparency, high color depth, wide-gamut color and high dynamic range, often shortened to HDR. Support for a feature can vary between encoders, editing applications and browsers, so the format’s capabilities should not be confused with universal support in every program.
Myth one AVIF always creates the smallest image
AVIF is often very efficient, but it does not guarantee the smallest file in every situation. File size depends on the original image, its dimensions, noise level, transparency, color information, animation settings and the encoder used to create it.
A simple graphic with a few flat colors may compress very well as PNG or WebP. A small icon may gain little from being converted to AVIF. A detailed photograph may benefit more because AVIF can represent photographic textures efficiently at a suitable quality setting.
Even two AVIF files made from the same source can have different sizes and visual results. Encoders may use different speed and quality settings. Some prioritize faster processing, while others spend more time searching for a more compact result.
The practical rule is to compare the converted file with the original and with alternative formats. Check both file size and visible quality. A smaller file is not a success if it has distracting artifacts, missing transparency or unsuitable color.
Myth two smaller files always look worse
AVIF can reduce file size while retaining strong visual quality, especially for photographs and large web images. This happens because modern compression tries to remove details that are less noticeable to human vision rather than treating every pixel equally.
That does not mean AVIF can reduce an image indefinitely without damage. At aggressive compression levels, fine textures may disappear, edges can look soft, and block-like or ringing artifacts may appear. Small text, thin lines and illustrations can reveal problems more easily than a natural photograph.
Quality settings are not universal numbers. A quality value in one encoder may not produce the same result as the same value in another encoder. The best approach is to inspect the actual image at its intended display size. A file that looks poor when enlarged far beyond its normal use may look perfectly acceptable on a web page.
For important images, compare several versions before publishing. Pay particular attention to faces, foliage, fabric, shadows, text and high-contrast edges. These areas often show compression damage first.
Myth three AVIF is a lossless format
AVIF can be lossless, but AVIF itself is not automatically lossless. Lossless compression preserves the original image data. Lossy compression creates a smaller file by discarding information that may be difficult to notice.
When a source image is converted to lossy AVIF, converting that AVIF back to PNG or another lossless format does not restore the discarded detail. The new PNG may technically be lossless from that point onward, but it will contain the already reduced image information.
Lossless AVIF can be useful when exact pixel preservation matters and the software reading the file supports it. However, the result may not be smaller than a well-optimized PNG, WebP or another appropriate format. Lossless does not mean smallest, and lossy does not mean unusable.
Choose lossless encoding for cases such as archival work, certain graphics, screenshots or further editing where repeated quality loss is undesirable. Choose lossy encoding when delivery size matters and a carefully checked visual result is acceptable.
Myth four AVIF is only useful for photographs
Photographs are a strong use case because AVIF handles complex color and texture efficiently. However, the format can also store illustrations, screenshots, interface images and graphics with transparency.
Results for graphics depend on their structure. A screenshot containing small text may need careful testing because compression can soften letters. A flat illustration with sharp edges may be better suited to SVG, PNG or WebP depending on its design and delivery requirements.
AVIF supports an alpha channel, which is the part of an image that describes transparency. This makes it possible to store logos, cutout subjects and overlays without a solid background. The encoder settings still matter, because transparent edges can show halos or color fringing if the image is handled poorly.
There is no single format that is ideal for every visual. The content itself should guide the decision.
Myth five AVIF cannot contain animation or transparency
AVIF can support both animation and transparency. An animated AVIF contains a sequence of image frames, while a transparent AVIF includes an alpha channel that controls which pixels are visible.
These features are useful, but they are not a guarantee that every application will handle them correctly. A browser or editor may display a static first frame, ignore transparency, or fail to open the file if its AVIF implementation is limited.
Animated files can also become large. An animation contains multiple frames, so its total size depends on frame dimensions, frame count, visual changes and timing. Converting an animated image to a static format may preserve only one frame unless the conversion tool specifically supports animation.
Always test animated or transparent images in the destinations that matter. This includes the main browsers, content management system and image editing software used by your audience or team.
Myth six every browser and app supports AVIF equally
AVIF support is now available in many current browsers and image tools, but support is not identical everywhere. Older browsers, older operating systems, email clients, document applications and some upload systems may not recognize the format.
Even when a program can open an AVIF file, it may not support every feature. One application may display a standard lossy image but not an animated file, HDR color or a particular metadata type.
For public websites, compatibility can be managed with a fallback. A server or browser can be configured to offer AVIF to clients that support it and another format, such as WebP or JPEG, to clients that do not. The exact method depends on the website platform and delivery setup.
If you are sharing an image directly with someone, compatibility is more important than theoretical compression efficiency. JPEG or PNG may remain the safer choice when you do not know which software will open the file.
Myth seven AVIF is always faster for websites
A smaller file can reduce download time, especially on slower connections. That is one reason AVIF can improve image delivery. However, website speed is not determined by file size alone.
The browser must decode the image after downloading it. Decoding means turning compressed image data into pixels that can be displayed. AVIF decoding may require more processing than decoding some older formats, particularly on older or low-powered devices. The result depends on the browser, device hardware, image dimensions and file complexity.
Encoding can also be slower. This matters to website owners who generate many image variants, run an upload pipeline or create thumbnails on demand. A format that saves bandwidth may use more server processing time during conversion.
The right choice balances delivery size, decoding cost, server work and compatibility. Test representative images on the devices and connections used by your visitors instead of assuming that one format always wins.
Myth eight converting an image to AVIF improves its original quality
Conversion changes how an image is stored. It does not add real detail that was absent from the source. If a small, blurry JPEG is converted to AVIF, the result may be smaller and may show fewer new compression artifacts, but it will not recover the original lost detail.
Some software applies sharpening, noise reduction or upscaling during conversion. Those are separate image-processing operations, not benefits provided automatically by AVIF.
It is also important to avoid repeated lossy conversions. Each lossy conversion can remove more information. Keep a high-quality master file, preferably in an appropriate lossless or editing-friendly format, and create delivery versions from that master.
AVIF compared with common image formats
The best format depends on what the image contains and where it will be used. The table below gives a practical overview rather than a universal ranking.
| Format | Typical strengths | Common limitations |
|---|---|---|
| AVIF | Strong compression, photographs, transparency, wide color and HDR support | Encoding can be demanding, and compatibility varies by software and feature |
| WebP | Good web compression, lossy and lossless modes, transparency and broad modern support | May not offer the same efficiency or advanced color capabilities in every case |
| JPEG | Photographs, simple sharing and very broad compatibility | No standard transparency and repeated lossy editing can reduce quality |
| PNG | Lossless graphics, screenshots, text and transparency | Can create large files for detailed photographs |
| SVG | Logos, icons and vector illustrations that need to scale | Not suitable as a direct replacement for ordinary pixel-based photographs |
WebP is often a practical alternative when you want modern compression with a familiar web workflow. If an AVIF image is not convenient for a particular website, app or recipient, you can convert it to WebP using a suitable image conversion tool. The conversion should still be checked for quality, transparency and animation support.
How to choose AVIF quality settings
Start with the purpose of the image rather than a target file size alone. A hero photograph, product image, thumbnail and screenshot may need different settings.
- Resize first. Do not encode a much larger image than the page will display. Dimensions often affect file size more than fine quality adjustments.
- Use a moderate quality setting. Make a few versions and inspect them at normal display size.
- Check important details. Look at faces, text, thin lines, shadows and transparent edges.
- Keep the original master. Generate AVIF and other delivery formats from the best available source.
- Test the real destination. An image can look correct in one viewer and behave differently in a browser or content system.
Do not judge an image only by its file extension or by a quality number. Visual comparison is more reliable than assuming that a particular setting is suitable for every file.
Metadata and color need practical attention
Metadata is extra information stored with an image, such as camera details, orientation, copyright information or location data. During conversion, some metadata may be preserved, changed or removed depending on the tool.
For a website image, removing unnecessary metadata can reduce file size and protect private information. For an archive or professional workflow, metadata may be important. Decide what should remain before processing a large collection.
Color management can also affect appearance. A wide-gamut or HDR image may look different in software that does not fully support its color information. If consistent appearance is more important than advanced color range, test the image in the browsers and applications used by your audience.
When AVIF is a good choice
AVIF is worth considering when you control the delivery workflow, your target browsers support it, and reducing image transfer size is important. It is particularly useful for large photographs, image-heavy pages and cases where transparency or advanced color is needed.
It may be less convenient when files must open in old software, when users download images for unknown applications, or when your server cannot efficiently encode and serve multiple formats. A fallback can solve some of these problems, but it adds setup and testing.
For many websites, the practical approach is not to choose one format for every image. Use AVIF where it provides a clear benefit, keep WebP or JPEG as a fallback when needed, and use PNG or SVG when their specific strengths are more suitable.
Frequently asked questions
Is AVIF better than WebP?
Neither format is always better. AVIF may produce a smaller file or support a feature that suits a particular image, while WebP may encode faster or offer simpler compatibility. Compare the actual files and test them in the software that matters for your project.
Can I open an AVIF file on any device?
No. Many current browsers and applications support AVIF, but older devices and some image viewers may not. If you are sending the file to someone else, use a more widely supported format or provide an alternative.
Does AVIF support transparent backgrounds?
Yes. AVIF can store an alpha channel for transparent areas. The tool creating the file and the program displaying it must both support transparency correctly.
Can AVIF be animated?
Yes, AVIF can contain multiple frames. However, animation support varies between applications, and an animated file may be converted to a single still image if the chosen tool does not preserve all frames.
Should I convert every website image to AVIF?
No. First consider the image type, audience, browser support, server workflow and fallback options. AVIF is often useful for photographs, but PNG, WebP, JPEG or SVG may be more practical for other images.
Is converting JPEG to AVIF useful?
It can reduce the delivery file size, especially when the source is a large photograph. It cannot restore detail already lost in the JPEG. Keep the original high-quality source and inspect the AVIF for new artifacts before publishing it.
Does converting AVIF to WebP reduce quality?
It can, depending on the conversion mode and settings. A lossy AVIF converted to lossy WebP may lose additional detail. If possible, convert from the original master instead of making one lossy format the source for another.
Why does an AVIF file look different in different programs?
Programs can differ in color management, HDR handling, metadata interpretation, animation support and decoding implementation. Check the file in the browser or application where it will actually be used.
Is AVIF suitable for printing?
It can store high-quality image data, but print workflows often expect particular color profiles, resolutions and file formats. Ask the printer or publishing system which formats it accepts instead of assuming that web suitability also means print suitability.
What is the safest format for sharing an image?
JPEG is usually the safest choice for ordinary photographs because it is supported almost everywhere. PNG is a better fit for lossless graphics or transparency. AVIF and WebP are useful when the recipient’s software is known to support them.
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