# Optimizing Website Performance by Converting Images to WebP Format Your website loads slowly, especially on mobile devices. PageSpeed Insights shows images are the main culprit—they account for 60-80% of page weight. You need to: - Reduce image file sizes without noticeable quality loss; - Improve page load times for better user experience; - Lower bandwidth costs; - Improve SEO rankings (page speed is a ranking factor). In this use case, we'll show how converting images to **WebP format** can dramatically improve website performance while maintaining visual quality. --- ## 1. Audit your current website images Before converting, understand what you're working with: 1. **Identify image-heavy pages:** - Use browser DevTools → Network tab; - Load pages and sort by size; - Note which images are largest. 2. **Inventory image formats:** - Count JPEG vs. PNG vs. GIF files; - Note image dimensions (width × height); - Check file sizes (aim to reduce by 25-35% with WebP). 3. **Identify image types:** - **Photos:** Product images, hero images, gallery photos (→ convert to WebP); - **Graphics:** Logos, icons, illustrations (→ consider WebP lossless); - **Screenshots:** Interface mockups, documentation images (→ convert to WebP); - **Animations:** Animated GIFs (→ convert to animated WebP). 4. **Document current state:** - List all images with formats and sizes; - Note which pages use which images; - Calculate total image weight per page. **Example audit:** ``` Homepage: - hero-image.jpg: 450KB → target: 300KB (WebP) - product-1.jpg: 200KB → target: 140KB (WebP) - logo.png: 50KB → target: 35KB (WebP lossless) Total: 700KB → target: 475KB (32% reduction) ``` --- ## 2. Convert images to WebP format For each image, convert to WebP: 1. **Open FastOS Tools Image to WebP Converter:** - Navigate to Image to WebP Converter; - Upload your image (JPEG, PNG, GIF supported); - All processing happens in browser (privacy-focused). 2. **Choose quality settings:** - **Photos:** Quality 75-85 (recommended: 80) - High quality, good compression; - Usually 25-35% smaller than JPEG; - **Graphics/Logos:** Lossless mode - Perfect quality; - 26% smaller than PNG on average; - **Thumbnails:** Quality 60-75 - Smaller files; - Acceptable quality for small images. 3. **Convert and preview:** - Click "Convert to WebP"; - Preview converted image; - Compare file sizes (original vs. WebP); - Check visual quality; - Adjust quality if needed. 4. **Download WebP file:** - Save with `.webp` extension; - Use descriptive filename: `hero-image.webp`; - Keep original files as backup. **Example conversion:** - Original: `product-photo.jpg` (200KB, quality 90) - WebP: `product-photo.webp` (140KB, quality 80) - Reduction: 30% smaller, visually identical --- ## 3. Implement WebP with fallback for older browsers WebP is supported by ~97% of browsers, but you need fallbacks for the remaining 3%: **Method 1: HTML picture element (recommended):** ```html

``` **How it works:** - Modern browsers: Load WebP version; - Older browsers: Fall back to JPEG/PNG; - Automatic, no JavaScript needed. **Implementation:** 1. Upload both WebP and original (JPEG/PNG) to server; 2. Update HTML to use `

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