Check GZIP compression

What Is a GZIP Compression Checker?

GZIP compression shrinks the files a server sends to a browser — HTML, CSS, and JavaScript — before transferring them, which can significantly cut load time on text-heavy pages. This tool checks whether GZIP (or a modern equivalent like Brotli) is actually enabled on your server.

How Our GZIP Compression Checker Works

Enter your URL, and the tool requests the page while checking the server's response headers for compression encoding, then reports whether compression is active and how much size reduction it's providing.

How to Use the GZIP Compression Checker

• Enter your website's URL
• Click Check Compression
• Review whether GZIP/Brotli compression is enabled
• If not enabled, contact your host or update your server configuration

Key Features

• Instant compression status — enabled or not, in one check
• Size reduction insight — see roughly how much smaller compressed responses are
• No technical setup needed — just enter a URL

Who Uses This Tool

Site owners diagnosing slow page speed check whether compression is a missing quick win. Developers verify a new server configuration is actually serving compressed responses. SEO auditors include this in a broader Core Web Vitals and page speed review.

Frequently Asked Questions

Why does GZIP matter for SEO?
Faster page loads improve user experience and are a factor in Core Web Vitals, which can indirectly support better rankings.

How do I enable GZIP if it's off?
Most hosts and web servers (Apache, Nginx) support enabling it through a configuration change or a plugin if you're on a CMS like WordPress — check with your host if you're unsure how.

Is this tool free?
Yes, checking compression status is completely free.