Free Cache Header Analyzer — Inspect HTTP Caching Configuration
Analyze the HTTP caching headers on any URL to verify Cache-Control, Expires, ETag, and Vary headers are configured correctly for optimal performance.
Free — no account required for a single check. Sign up for continuous monitoring →
What the Cache Header Analyzer checks
Cache-Control directives
max-age and s-maxage values
ETag presence
Last-Modified header
Vary header configuration
Browser and CDN cacheability
How it works
Sends HTTP requests to each resource URL and parses all caching-related response headers to identify misconfiguration.
Monitor continuously — not just once
This free tool runs a one-off check. AuditJet monitors your site on a schedule — alerting you when scores change, before performance regressions affect your rankings and revenue.
Cache Header Analyzer — FAQ
Is the Cache Header Analyzer free?
Yes — Cache Header Analyzer is completely free to use. No account required for a single-URL check.
How does the Cache Header Analyzer work?
Sends HTTP requests to each resource URL and parses all caching-related response headers to identify misconfiguration.
What does the Cache Header Analyzer check?
Cache-Control directives. max-age and s-maxage values. ETag presence. Last-Modified header. Vary header configuration. Browser and CDN cacheability.
How is this different from Google PageSpeed Insights?
Google PageSpeed Insights is a one-off manual tool. AuditJet adds continuous monitoring, regression alerting, and revenue impact on top of the same performance analysis — so you're notified when scores change, not just when you remember to check.