HTML Compression Test
Check if your website
Check Compression
What is HTML Compression?
HTML compression (often called minification or Gzip/Brotli compression) is a technique used to reduce the size of the HTML files sent from your server to a visitor's browser. Smaller files mean faster downloads and a snappier user experience.
- Minification: Removing unnecessary whitespace, comments, and line breaks from the source code.
- Gzip: A common compression algorithm that replaces repetitive strings of code with shorter tokens.
- Brotli: A modern algorithm from Google that offers even better compression ratios than Gzip.
Why Compression Matters
Page speed is a confirmed ranking factor for both desktop and mobile search. High file sizes lead to increased "Time to First Byte" (TTFB) and longer page load times, which frustrates users and increases bounce rates.
Enabling Brotli compression can reduce HTML file sizes by up to 80% compared to uncompressed files, leading to immediate performance gains without changing a single line of your content.
Best Practices for Compression
Maximize your site's performance by following these compression standards:
- Prefer Brotli: If your server supports it, use Brotli. It's more efficient than Gzip and widely supported by modern browsers.
- Use a CDN: Services like Cloudflare or Akamai automatically handle compression at the "edge," taking the load off your server.
- Minify+Compress: Don't just compress; minify your HTML first to remove unnecessary bloat, then apply Gzip/Brotli.
- Verify Headers: Ensure your server sends the correct `Content-Encoding` header (e.g., `br` or `gzip`) to the browser.
How to Use This Tool
Enter a URL and click "Check Compression". We'll fetch the page and analyze its headers to see if Gzip or Brotli is active. We also calculate the "savings" — the difference between the raw HTML size and the compressed data sent over the wire.
Frequently Asked Questions
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