What Is WebP? A Complete Guide to the Modern Image Format

WebP is a modern image format developed by Google that provides superior lossless and lossy compression for images on the web. Since its introduction, it has become the go-to format for web developers, designers, and SEO professionals who need smaller files without visible quality loss.

If you are new to WebP, this guide covers everything you need to know — and shows you how to start converting images today.

What Makes WebP Different?

WebP supports both lossy and lossless compression, plus transparency (alpha channel) and animation. That makes it a strong replacement for JPEG, PNG, and GIF in most web use cases.

Key advantages include:

• Smaller file sizes — typically 25–35% smaller than JPEG and up to 26% smaller than PNG at equivalent quality
• Transparency support — unlike JPEG, WebP handles alpha channels efficiently
• Wide browser support — all major browsers support WebP natively in 2026
• SEO benefits — faster pages improve Core Web Vitals and search rankings

WebP vs JPG and PNG

Not sure how WebP compares to formats you already use?

• Read our JPG vs WebP comparison for photographs and hero images
• Read our PNG vs WebP comparison for graphics, logos, and transparency

For most websites, WebP is the best default format for photos and UI images served to modern browsers.

When Should You Use WebP?

WebP is ideal for:

• Photographs and complex images on websites
• UI graphics and icons that need transparency
• E-commerce product images
• Blog post featured images
• Any image where file size affects page speed and LCP

Use JPEG or PNG as fallbacks only when you must support legacy environments — see our guide on best image formats for websites.

How to Convert Images to WebP

You can convert existing JPG, PNG, and GIF files to WebP using our free tools:

• Image to WebP converter — all supported formats
• JPG to WebP — optimized for photos
• PNG to WebP — great for graphics with transparency

All conversion happens in your browser. Your files are never uploaded to a server.

Why Google Created WebP

Google introduced WebP to solve a simple problem: the web was slow because images were too large. Learn the full story in Why Google Created WebP.

Conclusion

WebP represents current best practice for web images. If you are still serving only JPEG and PNG without WebP alternatives, you are likely leaving significant performance and SEO gains on the table.

Start with our free Image to WebP converter — no registration, no upload, no limits.