WebP tools

What you need to know

WebP is a modern image format developed by Google, first released in 2010, designed to provide superior compression for both lossy and lossless images on the web. WebP supports both lossy compression (based on VP8 video frame compression) and lossless compression, alpha channel transparency, animation, and ICC color profiles. WebP lossy files are typically 25-35 percent smaller than equivalent JPG files at the same visual quality, and WebP lossless files are typically 26 percent smaller than equivalent PNG files. As of 2024, WebP is supported by over 95 percent of web browsers globally, including Chrome, Firefox, Safari, and Edge, making it a practical choice for modern web delivery.

Key points

• WebP supports both lossy and lossless compression in a single format
• WebP lossy files are 25-35 percent smaller than equivalent JPG at the same quality
• WebP lossless files are about 26 percent smaller than equivalent PNG
• WebP supports transparency, animation, and color profiles
• WebP browser support exceeds 95 percent globally as of 2024

Website performance optimization

Converting JPG and PNG images to WebP reduces page weight by 25-35 percent, directly improving Largest Contentful Paint and overall page load times. Most modern CMS platforms and CDNs support automatic WebP conversion and serving.

E-commerce product images

WebP keeps product photos sharp while cutting file size, helping category and product pages load faster and lowering bounce rate, with JPG fallbacks for very old clients.

Recommended practices

• Serve WebP with JPG/PNG fallbacks using the picture element for older browsers
• Use WebP lossy for photographs and WebP lossless for screenshots and graphics
• Test visual quality at each compression level; WebP artifacts differ from JPG artifacts
• Keep original JPG/PNG source files for compatibility and future re-encoding
• Use CDN automatic format negotiation to serve WebP only to supported browsers

Common mistakes to avoid

• Serving WebP without fallbacks for older browsers: While support exceeds 95 percent, some older browsers and enterprise systems still cannot display WebP. Always provide JPG or PNG fallbacks using the HTML picture element or server-side content negotiation.
• Converting already-compressed JPG to WebP expecting better quality: WebP cannot recover detail lost by prior JPG compression. For best results, convert from the original high-quality source, not from a previously compressed JPG.
• Assuming WebP is always smaller: For very small images (under a few KB) or images with unusual content, WebP may occasionally be larger than JPG or PNG due to header overhead. Always compare file sizes for each image.