CSS Optimization Test


This test shows you what steps you can take to optimize the CSS delivery of your web page(s). It checks your web page to find unoptimized methods and CSS scripts and gives you advice on how to optimize this. Learn more about optimizing the CSS delivery here.

  • The number of CSS files (and how many).
  • Whether the CSS is inlined or not.
  • Whether CSS files are optimally minified.
  • The usage of STYLE tags inside the HTML body.
  • Usage of CSS @import directives to call files.
  • Usage of CSS Expression properties.
  • Usage of AlphaImageLoader filters.

By perfecting the CSS delivery you make sure your CSS scripts do not block the rendering of your web pages, especially the above-the-fold content. For instance, using external CSS files blocks your web page from rendering immediately. By replacing your CSS files with inlined CSS scripts you eliminate this problem. This tool can tell you which parts of your website need CSS delivery optimization.


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Website Speed Test

Test and analyze the loading times of your website.

CSS Compressor

Minimize CSS scripts and files for page speed.

Caching Test

Check how and whether your website files are cached.

GZIP Compression Test

Check whether your web pages have Gzip compression enabled.

Javascript Compressor

Minify your JS files and scripts to maximize performance.

Image Optimization Test

Tests your image delivery so you can improve it.

PNG Compressor

Reduce your PNG image filesize while keeping quality.

JPEG Compressor

Play with the quality and size of JPEGs to save disk space.

CSS Sprites Generator

Place multiple images in one image to make fewer requests.

CSS Optimization Test

Analyze your CSS to make improvements to the CSS Delivery.

Javascript Optimization Test

Analyzes the Javascript delivery of your web pages.

Broken Links/Requests Test

Test your web pages for broken links and requests.

HTTP Requests Checker

How many HTTP requests do your web pages produce?

Base64 Encoder

Encode JPEG and other files into a Base64 string.

Keep-Alive Checker

Check whether your website has keep-alive settings as enabled.

HTTP Header Checker

Check the HTTP server header of your site.