Performance Tools
Performance Health Score
A combined performance overview - response time, compression, HTTP version, keep-alive, and CDN usage.
Enter a domain for a combined performance overview - response time, compression, HTTP version, keep-alive, and CDN usage.
JustChecker tracks your website's performance signals continuously and alerts you if anything regresses.
Frequently Asked Questions
This score focuses specifically on performance-related signals (response time, compression, HTTP version, keep-alive, CDN usage), while JustChecker's account-based Website Health Score combines a broader set of factors including uptime, SSL, and security into one overall rating.
Response time and compression configuration tend to have the most immediately noticeable impact, since they directly affect how quickly the first meaningful content reaches a visitor - though every factor contributes to the combined result.
Yes - using a CDN helps but doesn't automatically guarantee good scores on every other factor (compression, HTTP version, caching headers) if those aren't also properly configured, either at the origin or within the CDN's own settings.
Yes - since this reflects a live snapshot, re-running the check after implementing a fix (enabling compression, upgrading to HTTP/2) is the direct way to confirm the change actually took effect as expected.
It reflects strong server/infrastructure-level configuration, but perceived speed also depends on front-end factors this specific check doesn't evaluate - large unoptimized images, excessive JavaScript execution, and render-blocking resources, for example.