Speed up your website
The fast, reliable
gzip compression checker for websites
Find out if your website is using GZIP compression. Get instant results showing file sizes and potential savings.
Trusted by startups and developers worldwide
Test your website now
Enter any website URL. We'll check for GZIP compression and show you exactly how much faster your site could load.
Result summary
curl -s -i https://example.com | grep -i "content-encoding"
# Content-Encoding: gzip
# Or check with our API:
POST /api/check { "url": "https://example.com" }{
"content-type": "text/html; charset=utf-8",
"content-encoding": "gzip",
...
}Enable compression your way
Choose the setup that fits your stack: a simple plugin, a quick .htaccess update, or Brotli for best‑in‑class compression.
Use Our Plugin
Install GZIP compression instantly with our Check GZIP plugin - no server access needed. This plugin will automatically detect your platform and WordPress version to smartly configure Brotli and GZIP compression.
What's included
Here are all the features of Check GZIP Compression that surpass us from other tools.
Comprehensive analysis of both GZIP and Brotli compression with detailed ratios and performance insights.
Generate shareable links for your analysis results to collaborate with team members and clients.
Access compression checking through simple, well-documented APIs for seamless integration into applications.
Completely free compression analysis with no hidden fees, registration requirements, or usage limitations.
Detailed performance metrics, file size comparisons, and actionable recommendations to optimize loading speed.
Support for analyzing HTML, CSS, JavaScript, JSON, and other web assets across different compression methods.
Platform features
We handle the
hard stuff
We handle the technical details and give you clear, easy-to-understand results about your website's compression.
How it works
We rapidly analyze your website's server, follow any redirects, examine the response headers, and calculate the potential space savings from GZIP compression implementation.
const analyzeCompression = async (url) => {
// Fetch with redirect following
const response = await fetch(url, {
redirect: 'follow',
headers: { 'Accept-Encoding': 'gzip, deflate, br' }
})
// Extract headers & measure payload
const headers = Object.fromEntries(response.headers)
const encoding = headers['content-encoding'] || 'none'
const rawBytes = await response.arrayBuffer()
// Calculate compression potential
return calculateSavings(rawBytes, encoding)
}Frequently asked questions
Quick answers about compression detection, setup, and troubleshooting.
What is GZIP compression?
Is GZIP compression enabled?
Can you use GZIP on images?
How do I test GZIP compression?
Method 1: Online Tool
Simply visit checkgzipcompression.net, enter your website URL, and click 'Test Now' for instant results.
Method 2: WordPress Plugin
Download our free plugin from the WordPress repository, which allows you to check compression status directly from your dashboard.
How can I download & install the plugin?
Step 1: Download the plugin from our website or the WordPress repository.
Step 2: Log into your WordPress admin area, go to 'Plugins' > 'Add New' > 'Upload Plugin'.
Step 3: Select the downloaded plugin file and click 'Install Now'.
Step 4: Activate the plugin once installation is complete.
That's it - your website will now have GZIP compression enabled!
Is this plugin free?
How do I enable GZIP compression in HTML?
What is the difference between GZIP and Brotli?
GZIP:
• Universal browser support
• Widely used and reliable
• Good compression ratios
Brotli:
• Newer algorithm developed by Google
• 20-25% better compression than GZIP
• Supported by all modern browsers
Our tool checks for both types. We recommend enabling both GZIP (as fallback) and Brotli for optimal performance.
Check your site’s compression now
No signup required, no personal data collected. Just enter your URL and get instant results.