When it comes to building a fast, modern website, image optimization is a big deal, especially if you’re showing off products, services, or just want your site to feel snappy. If you’ve ever run your site through a speed test and heard about “modern image formats,” you’ve probably seen two terms pop up: AVIF and WebP.

So… what the heck are they? And should you care?

Let’s break it down.

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First, What Are AVIF and WebP?

They’re both newer image formats designed to shrink your image file sizes without making them look like potato-quality JPGs from 2003.

• WebP: Developed by Google, it’s been around longer and supported by pretty much all major browsers.
• AVIF: The new kid on the block. Developed by the same folks behind the video format used by Netflix and YouTube. Super efficient, very small file sizes, and as of 2024 most modern browsers understand them.

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Why Use These Formats?

Simple: smaller files = faster website. And faster websites = happy visitors (and better Google rankings).

Traditional formats like JPEG and PNG are solid, but they’re a bit bloated compared to these modern formats. AVIF and WebP can dramatically reduce file size,often cutting your image weight by 30–50% or more,without losing quality.

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Which One’s Better?

Let’s compare them in a few categories:

Image Quality

• AVIF wins here. It handles compression better and even supports transparency and HDR.
• WebP is still very good, but AVIF squeezes out a little more quality at the same file size.

File Size

• AVIF files are usually smaller than WebP, sometimes by a lot.

Browser Support

• WebP is king right now: supported by nearly all modern browsers.
• AVIF is getting there but still not 100% supported (looking at you, older Safari).

Speed to Load

• AVIF can take a bit longer to decode, especially on lower-powered devices.
• WebP is faster and easier on the processor.

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So… Which Should You Use?

Honestly? If your site is built for speed (and if you’re working with me, it is), here’s the simple advice:

Use WebP as your default format. It’s well-supported and offers big savings over JPEG/PNG if your concerned about older browsers.

Use AVIF where it makes sense. If your site supports it and your audience is mostly using newer browsers, go ahead and use AVIFs, especially for big hero images or anything with transparency.

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Final Thoughts

Modern image formats might sound like boring nerd stuff, but they make a real difference in site speed, SEO, and user experience.

Want help making sure your images aren’t slowing you down? Let’s talk, all websites hosted by Bottomground use automatic image optimization to convert your images to the most efficient they can be helping to make your site faster and your audience happier,