What is webp

Last updated: April 1, 2026

Quick Answer: WebP is a modern image format developed by Google that offers superior compression compared to JPEG and PNG. It provides smaller file sizes while maintaining high image quality, making it ideal for web use and faster page loading.

Key Facts

Overview

WebP is a modern image file format created by Google that revolutionizes web image compression. Released in 2010, it offers superior compression efficiency compared to traditional formats like JPEG and PNG. A WebP image typically occupies 25-35% less disk space than an equivalent JPEG image at the same quality level.

Compression Technology

WebP uses advanced compression algorithms derived from VP8 video codec technology. The format supports both lossy compression (similar to JPEG, reducing file size by discarding some data) and lossless compression (like PNG, preserving all original information). This flexibility makes WebP suitable for photographs, graphics, and images requiring transparency.

Features and Capabilities

Beyond compression efficiency, WebP offers several advantages. It supports transparency (alpha channel) like PNG, enabling background transparency in web layouts. WebP also supports animation, functioning similarly to GIF but with superior compression. These features make WebP versatile for virtually any web image requirement.

Browser Support

WebP adoption has grown significantly, with all major browsers now supporting the format natively. Chrome, Firefox, Safari, and Edge all handle WebP images. Mobile browsers on iOS and Android also support WebP. For older browsers, developers can use fallback techniques, serving JPEG or PNG alternatives automatically.

Web Performance Benefits

Implementing WebP significantly improves website performance metrics. Smaller image files reduce bandwidth consumption and page load times, improving user experience particularly on mobile networks. Google's research shows WebP adoption can reduce page load times by 10-25%. Many content delivery networks and image optimization services now automatically convert and serve WebP images.

Related Questions

When should you use WebP instead of JPEG?

WebP should be used for most web images where file size matters, as it provides better compression than JPEG. Use JPEG only for maximum compatibility with very old browsers, or when WebP support cannot be guaranteed.

Is WebP better than JPEG?

WebP generally offers better compression than JPEG, typically reducing file size by 25-35% while maintaining comparable quality. However, JPEG has broader compatibility with older devices and software, so the choice depends on your specific needs.

How do you serve WebP images with fallbacks?

Use HTML picture elements to serve WebP to supporting browsers while providing JPEG or PNG fallbacks. Alternatively, use JavaScript detection to serve appropriate formats, or configure web servers to automatically convert and serve WebP when supported.

Can all browsers display WebP images?

Most modern browsers support WebP, but older versions of Safari, Internet Explorer, and some mobile browsers do not. Developers typically use fallback formats like JPEG or PNG to ensure compatibility across all devices.

What is the difference between WebP and AVIF?

AVIF is a newer format offering even better compression than WebP, but has less browser support. WebP is more widely supported and sufficient for most web use. AVIF may be the future standard but WebP is recommended for current production use.

How do I convert images to WebP format?

You can convert images to WebP using online tools, image editing software like Photoshop or GIMP, or command-line utilities like ImageMagick or Google's cwebp tool. Many web hosting services and CDNs offer automatic WebP conversion for compatible browsers.

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Sources

  1. Wikipedia - WebP CC-BY-SA-4.0
  2. Google Developers - WebP Format CC-BY-4.0