Performance

Website Optimization Tips That Actually Work

May 23, 2026 By Crawlio Team

Website performance isn't just about speed; it determines bounce rates, conversion rates, and search rankings. Google values speed because searchers do. In this tutorial, we outline actionable, low-overhead optimization tips that will dramatically improve your page speeds and user-experience scores.

1. Serve Images in Modern Formats

Images are usually the heaviest assets on any page. Serving uncompressed PNGs or massive JPEGs can choke bandwidth on mobile connections. Convert images to modern formats like WebP or AVIF, which offer superior quality at a fraction of the file size. Furthermore, always define width and height attributes on your images to prevent cumulative layout shifts (CLS).

2. Compress and Minify Assets

Minification removes unnecessary spaces, line breaks, and comments from your stylesheet and script files. Additionally, configure your web server to compress assets using Gzip or Brotli compression before sending them over the network. Compression can reduce file transfer sizes by up to 70%, accelerating site load speeds.

3. Eliminate Render-Blocking Scripts

When a browser encounters a standard `<script>` tag in your HTML, it stops rendering the page until it downloads and runs that script. Use `async` or `defer` attributes on non-critical scripts (such as analytics or ads) to ensure the browser paints the primary visual layout first.

4. Optimize Font Delivery

Web fonts can cause flash of invisible text (FOIT) if they load slowly. Use the `font-display: swap` directive in your `@font-face` rules to tell the browser to display a fallback system font immediately while the custom web font downloads. You can also preload your primary font files in the document header.