For most modern websites, AVIF is the better first choice when the goal is the smallest possible raster image at strong visual quality, while WebP remains the safer all-purpose option when compatibility and faster image processing matter more. In practice, many business websites should serve AVIF first, WebP second, and JPEG or PNG only as a fallback where needed.
The real question is which format gives visitors the right balance of file size, quality, browser support, and operational simplicity.
WebP vs. AVIF for Website Images
Both WebP and AVIF are modern raster image formats designed to outperform older JPEG, PNG, and GIF files in many common web use cases.
MDN's current image format guide describes WebP as an excellent general-purpose format with lossy, lossless, transparency, and animation support. It also notes that AVIF generally offers better compression while supporting transparency, animation, high bit depth, HDR, and wide colour gamut.
For a business website, choose AVIF for maximum compression efficiency, WebP for simplicity, or both when your delivery stack can automate multiple formats.
AVIF Usually Produces Smaller Files
AVIF's main advantage is compression efficiency.
For photographic images, AVIF can often deliver similar perceived quality at a smaller file size than WebP. Smaller image files can reduce transfer size and help pages load faster, particularly on mobile connections.
That matters most for large hero, portfolio, case-study, product, and blog imagery.
Google's current AVIF codelab describes AVIF as a high-efficiency format designed to make images smaller while maintaining strong visual quality.
Smaller is not automatically better if compression introduces visible artefacts. Test output visually rather than chasing the lowest number.
WebP Is Still an Excellent Default
WebP remains a strong choice because it combines good compression with mature browser support and widespread tooling.
It supports lossy and lossless compression, transparency, and animation.
For teams that want one modern raster format without a more complex delivery pipeline, WebP is still a sensible default—especially when the CMS or CDN already generates it automatically.
If the platform handles WebP reliably but AVIF support is inconsistent, the operational simplicity may outweigh the extra compression available from AVIF.
Browser Support Is No Longer a Major Barrier
Both formats are now supported across current versions of major browsers.
As of 2026, Can I Use reports global browser support of roughly 97% for WebP and 96% for AVIF. That gap is small enough that many modern sites can safely use both formats with a fallback strategy.
The bigger question is whether older devices or browsers still matter to your audience. Check your own analytics rather than relying only on global support percentages.
AVIF Can Take More Work to Encode
AVIF's stronger compression can come with higher encoding cost.
That matters less when images are processed once during upload or build time, and more when a platform generates thousands of variants dynamically.
WebP may therefore remain attractive for high-volume image pipelines that value fast generation and predictable tooling.
Neither Format Replaces SVG
WebP and AVIF are raster formats.
Do not use them as replacements for logos, icons, or simple illustrations that are naturally vector graphics.
For a logo that needs to stay perfectly sharp at different sizes, SVG is usually the better format.
Use WebP or AVIF for photographs and complex raster artwork. Use SVG for vector assets where appropriate.
Veil Vertex's guide to SVG vs. PNG for website logos covers that distinction in more detail.
Use the <picture> Element for Multiple Formats
If you want the advantages of AVIF without abandoning WebP or JPEG fallbacks, the HTML <picture> element lets the browser choose the first format it supports.
A simplified example is:
<picture>
<source srcset="hero.avif" type="image/avif">
<source srcset="hero.webp" type="image/webp">
<img src="hero.jpg" alt="Accounting team meeting with a client">
</picture>
Modern browsers can take AVIF while others fall back to WebP or JPEG. Many CDNs automate this selection.
Format Choice Does Not Replace Proper Image Sizing
A 3000-pixel-wide AVIF displayed at 700 pixels can still be wasteful.
The format is only one part of image optimisation.
Also resize images to real display dimensions, use responsive srcset/sizes, compress appropriately, lazy-load below-the-fold media, keep the LCP image eager, and define width and height.
Veil Vertex's guide to lazy loading images explains when delaying an image helps and when it can hurt Largest Contentful Paint.
Use the FORMAT Framework
Veil Vertex uses a simple framework for choosing a website image format:
F — File size: Which format produces the smallest acceptable result for this image?
O — Output quality: Does the image still look clean at the chosen compression level?
R — Reach: Do the browsers and devices your audience actually uses support the format?
M — Media type: Is this photography, transparency, animation, or a vector asset that belongs in another format?
A — Automation: Can your CMS, CDN, or build pipeline generate the format consistently?
T — Test: Compare real page weight and visual quality instead of assuming one format always wins.
This prevents a format decision from becoming a blanket rule for every image.
When to Choose AVIF
AVIF is a strong choice when:
- the site uses large photographic imagery;
- page weight matters;
- the image pipeline can generate AVIF automatically;
- current browsers make up almost all traffic;
- the team is willing to maintain a fallback where necessary.
It is particularly useful for high-resolution hero and portfolio images where file size affects page performance.
When to Choose WebP
WebP is a strong choice when:
- you want a widely supported modern format;
- your CMS or CDN already outputs WebP;
- image generation speed matters;
- you want one simple replacement for many JPEG and PNG assets;
- the extra complexity of AVIF is not justified.
For many small business websites, WebP alone is already a substantial improvement over oversized JPEG and PNG files.
WebP vs. AVIF Checklist
Before changing formats, confirm:
- the image is raster content rather than a logo better served as SVG;
- the new format is actually smaller at comparable visual quality;
- large images are resized for their real display dimensions;
- responsive image variants are available;
- AVIF has a fallback if your audience requires one;
- below-the-fold images are lazy-loaded appropriately;
- the LCP image is not delayed;
- width and height are defined;
- your CMS or CDN can automate conversion;
- the final page is tested on real devices.
The biggest mistake is debating formats while still uploading images far larger than their display size.
Use the Best Format Your Delivery Stack Can Support Reliably
AVIF is generally the stronger compression format. WebP is generally the simpler universal modern default.
You do not need to choose one forever. A modern pipeline can serve AVIF first, fall back to WebP, and keep older formats only when necessary.
If your website is image-heavy and still feels slow, Veil Vertex can identify whether format, sizing, LCP priority, or the broader page-loading path is responsible through a free tailored website audit.