WebP Compression: Why It's Better Than JPEG

JPEG has been the default image format for 30 years. It's everywhere. Every camera, every phone, every website uses it.

But JPEG is showing its age. There's a newer format that produces smaller files at the same quality. It supports transparency. It handles both photos and graphics well. And every modern browser supports it.

That format is WebP. Here's why it beats JPEG for web images and how to start using it.

How Much Smaller Is WebP Than JPEG?

The numbers are clear. WebP produces files that are 25-35% smaller than JPEG at the same visual quality.

Google ran extensive tests when they created WebP. On a dataset of 1 million images, WebP lossy files were 25-34% smaller than equivalent JPEG files. For lossless compression, WebP was 26% smaller than PNG.

What does that look like in practice? A product photo compressed as JPEG at quality 80 might be 200 KB. The same image as WebP at the same visual quality is around 140 KB. That's 60 KB saved per image.

Scale that across a website. A page with 10 product images saves 600 KB. A blog with 50 images across all posts saves 3 MB. An e-commerce site with thousands of listings? The bandwidth savings add up fast.

And these aren't theoretical numbers. They come from real-world compression comparisons. The savings hold across different types of photos. Portraits, landscapes, product shots, food photography. WebP consistently beats JPEG on file size.

For a deeper look at how different compression methods work and when to use them, our complete guide to image compression covers the fundamentals.

What Makes WebP Compress Better Than JPEG?

JPEG was designed in 1992. It uses a technique called Discrete Cosine Transform (DCT) to compress images in 8x8 pixel blocks. This was brilliant for its time, but the block-based approach creates visible artifacts at lower quality settings. You've seen them: those blocky, pixelated patches that appear when JPEG quality drops too low.

WebP uses a more modern approach. It's based on the VP8 video codec (the same technology used in WebM video). Instead of rigid 8x8 blocks, WebP uses variable block sizes. It predicts what each block of pixels will look like based on surrounding blocks. It only stores the difference between the prediction and the actual image.

This prediction-based approach is much more efficient. It means WebP can describe the same image data using fewer bytes.

WebP also has better handling of sharp edges. JPEG often creates "ringing" artifacts around text and hard edges. WebP's prediction model handles these transitions more cleanly. That's why WebP looks better than JPEG even at lower file sizes.

For lossless compression, WebP uses a combination of techniques. Transform coding, spatial prediction, color space transforms, and an efficient entropy coder. Together, these compress lossless images 25-30% better than PNG.

The practical result? You get smaller files that look the same or better. That's the whole story.

Do All Browsers Support WebP?

Yes. For practical purposes, WebP works everywhere.

As of 2026, WebP is supported by over 97% of browsers worldwide. Chrome, Firefox, Safari, Edge, Opera, and all major mobile browsers handle WebP natively. Safari added support in 2020 (Safari 14), which was the last major holdout.

The only browsers that don't support WebP are Internet Explorer (which Microsoft discontinued) and very old mobile browsers that barely anyone uses.

Here's the current browser support:

Browser	WebP Support
Chrome	Yes (since 2014)
Firefox	Yes (since 2019)
Safari	Yes (since 2020)
Edge	Yes (since 2018)
Opera	Yes (since 2014)
Samsung Internet	Yes
iOS Safari	Yes (since iOS 14)

If you still want a safety net, use the <picture> element with a JPEG fallback:

<picture>
  <source srcset="/photo.webp" type="image/webp">
  <img src="/photo.jpg" alt="Photo description">
</picture>

The browser picks WebP if it can. Otherwise it falls back to JPEG. No JavaScript needed. No extra complexity. The 2-3% of users on ancient browsers still see the image.

But for most sites in 2026, you can safely serve WebP to everyone.

Should You Convert All Your Images to WebP?

For most web images, yes. WebP gives you smaller files with no visible quality difference. There's very little reason not to use it.

But there are a few situations where you might stick with other formats.

Keep JPEG when you're distributing images for print or sharing files with people who might open them in older desktop software. Some photo editors and print services prefer JPEG. For the web though, WebP wins.

Keep PNG when you need pixel-perfect lossless compression for archival purposes or editing workflows. WebP lossless works too, but PNG is more universally supported in desktop tools and design software.

Consider AVIF when you want even better compression than WebP. AVIF files are 20-30% smaller than WebP. But AVIF encodes slower and has slightly less browser support (~93%). It's the next step, but WebP is the safe choice today.

Use SVG for logos, icons, and simple graphics. SVG is vector-based and scales perfectly to any size. It's typically smaller than any raster format for simple shapes and text.

For standard web use cases — product photos, blog images, hero banners, thumbnails — convert everything to WebP. The file size savings are free performance. And image compression for websites is one of the easiest speed wins available.

How Does WebP Affect SEO and Page Speed?

Smaller images mean faster pages. Faster pages mean better rankings. It's that straightforward.

Google's PageSpeed Insights specifically recommends serving images in "next-gen formats." That means WebP and AVIF. If you're still serving JPEG or PNG, you'll see this as a warning in every Lighthouse audit.

Switching from JPEG to WebP directly improves your Core Web Vitals. The metric that benefits most is Largest Contentful Paint (LCP). If your hero image is the LCP element (it usually is), a 30% smaller file means it loads 30% faster. That can drop your LCP by half a second or more.

Here's what the data shows:

• Pages serving WebP images load 200-500ms faster on average than the same pages serving JPEG.
• Mobile users see even bigger improvements because they're on slower connections.
• Google Search Console data consistently shows better Core Web Vitals for sites using modern image formats.

Beyond LCP, smaller images mean less bandwidth. Less bandwidth means lower hosting costs. For sites with heavy traffic, the savings are real.

And here's a bonus: Google Image Search indexes WebP files just fine. Your images still appear in image search results. WebP doesn't hurt discoverability at all.

How Do You Convert JPEG to WebP?

There are several ways to convert, depending on your workflow.

Online tools. The simplest method. Upload your JPEG, set a quality level, and download the WebP file. CompressIMG handles batch conversion. Upload up to 20 images at once, pick your quality, and download all of them as WebP.

Build-time conversion. If you use a framework like Next.js, Astro, or Gatsby, image optimization often happens automatically. Next.js Image component converts and resizes images at build time. You upload a JPEG, and visitors get a WebP.

Command-line tools. The cwebp tool from Google converts individual files. Sharp (Node.js) and Pillow (Python) handle conversion in code. These are useful for custom build pipelines.

CDN-based conversion. Services like Cloudflare and Imgix convert images on the fly. Upload the original JPEG, and the CDN serves WebP to browsers that support it. No build step needed.

For most content creators and small teams, an online tool is the fastest path. You don't need to change your CMS or hosting setup. Just compress and convert your images before uploading them.

What quality setting should you use? For photos, WebP quality 75-85 gives great results. Remember that WebP quality 80 looks equivalent to JPEG quality 85 because WebP's compression is more efficient. So you can use a slightly lower number and still get the same visual result.

What About WebP for Transparency and Animation?

One of WebP's advantages over JPEG is that it supports transparency and animation. JPEG supports neither.

Transparency: WebP handles alpha channels just like PNG. You can have fully transparent backgrounds, semi-transparent overlays, and smooth anti-aliased edges. But the file size is much smaller than PNG. A transparent WebP is typically 25-35% smaller than the same PNG.

This makes WebP excellent for:

• Product images on white or custom backgrounds
• Logo overlays
• UI elements like badges and stickers
• Any graphic that needs to sit on top of other content

Animation: WebP supports animation like GIF, but with much better compression. An animated WebP can be 30-50% smaller than the same GIF. It also supports more than 256 colors (GIF's limit), so animated WebP looks much better for photographic content.

For simple animations and memes, GIF still works fine. But if file size matters (and on the web, it always does), animated WebP is the better choice.

This versatility is what makes WebP special. JPEG handles photos. PNG handles transparency. GIF handles animation. WebP handles all three in one format, with better compression across the board.

Is It Time to Drop JPEG Entirely?

Not entirely. But for the web, WebP should be your default.

JPEG still has a place. It's the universal format that every device, app, and service understands. For sending photos via email, sharing files on USB drives, or working with print shops, JPEG is still the safe choice.

But for images on your website? There's no good reason to serve JPEG over WebP in 2026. The file sizes are smaller. The quality is the same or better. Browser support is near-universal. Every modern CMS and framework can handle WebP.

The comparison between TinyPNG, Squoosh, and CompressIMG shows that all major compression tools support WebP. You're not locked into any single tool or workflow.

Make the switch. Your images will be smaller. Your pages will be faster. Your visitors and Google will both notice.

CompressIMG converts and compresses your images to WebP in seconds. Upload your JPEGs, set the quality, and download WebP files that are 25-35% smaller. It's free and works right in your browser.