AVIF vs WebP vs JPEG: Which Should You Use?

For most websites, the best approach is AVIF as the first choice, WebP as a second, and JPEG as the final fallback, all served with the <picture> element. AVIF usually gives the smallest files, WebP is a widely supported middle ground, and JPEG works everywhere. If you can only pick one format, WebP is the safest modern choice, and JPEG is the safest of all.

The three formats at a glance

	AVIF	WebP	JPEG
File size at similar quality	Usually smallest	Smaller than JPEG	Largest of the three
Lossy compression	Yes	Yes	Yes
Lossless compression	Yes	Yes	No, in practice
Transparency	Yes	Yes	No
Animation	Possible, but slow to encode	Yes	No
HDR and wide color	Yes	Limited	Limited
Speed to encode	Slower	Faster	Fast
Browser support	All current major browsers	Near-universal	Universal
Best for	Photos and images where speed matters	A balanced default and a fallback	The final fallback for photos

Sizes depend on the image. MDN’s image format guide says lossy AVIF files can be around half the size of JPEG at visually similar quality, and cites a comparison with a median saving of about 50 percent for AVIF against about 30 percent for WebP on the same JPEG files. Your own images will vary, so test a few.

AVIF

Strengths: the best compression of the three in most tests, support for transparency, high bit depth and HDR, and royalty-free.

Weaknesses: slower to encode, no progressive rendering, and older browsers and some apps cannot display it.

Use it for: photos, product images and large hero images where page speed matters. Learn more in What Is AVIF?.

WebP

Strengths: much better compression than JPEG and PNG, transparency, animation, fast encoding, and very wide browser support.

Weaknesses: usually larger than AVIF at the same quality, and more limited on color depth.

Use it for: a good all-round format when you want a smaller file than JPEG with almost no support worries, and as the middle layer in an AVIF, WebP, JPEG chain.

JPEG

Strengths: works in every browser, app and platform, and is quick to create.

Weaknesses: the least efficient of the three, no transparency, and no practical lossless mode.

Use it for: the final fallback, and anywhere compatibility matters more than size, such as images sent in email or used in older software.

What about PNG, SVG and GIF?

• PNG is lossless and supports transparency, but files are often large. For screenshots with small text, consider lossless AVIF or WebP, or a high-quality lossy setting, and compare the size.
• SVG is usually the best format for logos, icons and simple illustrations, because it is vector-based and scales without losing sharpness.
• GIF is old and inefficient. For animation, MDN suggests considering WebP, AVIF or APNG, and a short video is often smaller still.

Which format for which image?

Image	Recommended
Photo or hero image	AVIF, with WebP and JPEG fallbacks
Product photo	AVIF with a JPEG or WebP fallback
Screenshot with text	High-quality AVIF or WebP, or PNG. Check legibility
Transparent graphic	AVIF or WebP, with a PNG fallback
Logo or icon	SVG
Animation	Short video or animated WebP
Social preview (Open Graph) image	JPEG, PNG or WebP. Check each platform before using AVIF

How to serve all three

<picture>
  <source srcset="/images/photo.avif" type="image/avif">
  <source srcset="/images/photo.webp" type="image/webp">
  <img src="/images/photo.jpg" alt="Describe what the image shows"
       width="1200" height="800" decoding="async">
</picture>

The browser takes the first source it supports, so modern browsers get AVIF, others get WebP, and the rest get JPEG. This adds some work, because you need three files per image, but you only produce the AVIF and WebP versions once. If you only want to keep two versions, AVIF with a JPEG fallback is a good pairing.

Does the format affect SEO?

Not directly. No image format is a ranking factor on its own. The effect is indirect: smaller images load faster and can improve metrics such as Largest Contentful Paint. Google Search can index AVIF, WebP and JPEG, and its image guidance lists all of them as supported. What matters most is that the image loads quickly, has a descriptive file name and alt text, and sits near relevant content.

How to decide

1. Do you need the smallest possible files for a speed-sensitive page? Use AVIF with fallbacks.
2. Do you want a simple setup with good savings? Use WebP with a JPEG fallback.
3. Is the image leaving your site? Use JPEG or PNG, or check support first.
4. Is it a logo or icon? Use SVG.

To convert your images, use the free Image to AVIF Converter, and see How to Convert JPG to AVIF for the steps.

Frequently asked questions

Is AVIF better than WebP?

For file size at similar quality, AVIF is usually better. WebP is faster to encode and supported slightly more widely, so many sites use both.

Is WebP better than JPEG?

Generally yes. It makes smaller files at similar quality and supports transparency, with broad browser support.

Which format is best for SEO?

None directly. The best choice is the one that makes your images small and fast to load without hurting quality, served with proper alt text and dimensions.

Do I need a fallback for AVIF?

Yes. All current major browsers support AVIF, but older ones do not, so use the picture element with a WebP or JPEG fallback.

Which format is best for transparent images?

AVIF or WebP, with a PNG fallback if you need one. JPEG does not support transparency.

Should I convert existing JPEGs to AVIF?

If they are large and matter for page speed, yes. Check each result at full size, and start from the original file when you can, because converting an already compressed JPEG cannot restore lost detail.