Compression Checker
Check if your server is serving compressed files (Gzip/Brotli) to speed up your website.
We'll check for Gzip, Brotli, and Deflate headers.
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Is GZIP or Brotli Enabled on Your Site?
Text compression (GZIP or Brotli) can shrink your HTML, CSS, and JavaScript by 70% or more before they travel the network. Enter any URL and this free checker tests the server's response headers to see which compression is active.
Faster transfers mean faster page loads and better Core Web Vitals. If compression is missing, the result tells you exactly what your host or CDN needs to enable.
GZIP and Brotli detection
The checker reads the response's content-encoding header and reports whether GZIP, Brotli, or no compression is in use.
Speed impact
See how compression (or the lack of it) affects transfer size — one of the quickest performance wins available.
How it works
Submit a URL and our server requests the page, inspects the response headers for content-encoding, and reports the compression status. The test runs server-side against any public URL.
How to use
- Enter the URL you want to test.
- Click the check button.
- Read whether GZIP or Brotli is enabled and what to fix if not.
Frequently Asked Questions
What is GZIP compression?
GZIP compresses text files (HTML, CSS, JS) on the server before sending them, typically cutting transfer size by 70% or more so pages load faster.
What is Brotli?
Brotli is a newer compression algorithm that usually beats GZIP by another 15–25% on text files. Most modern browsers and CDNs support it.
How do I enable GZIP on my site?
Most hosts and CDNs offer a one-click toggle; on Apache you can enable mod_deflate, and on Nginx the gzip module.
Does compression affect SEO?
Indirectly, yes — faster pages improve Core Web Vitals and user experience, which support better rankings.
Is the checker free?
Yes, free with no signup.
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