Cache and Compression Checker
Check if HTML and static assets provide meaningful cache and compression signals.
Technical pre-testing without browser rendering. Own scores of 0–100 mean: higher = less recognized risk signals. No measured LCP, INP or CLS values. TTFB is measured on the server side.
Ideal for CDN setups, WordPress caching, relaunch QA and technical performance basics.
Results
Technical pre-checking of a URL. For a crawl over many URLs, use the premium audit.
Findings
Detailed hit
Practical example · for illustration
Versioned assets cache long, protect private content
For example, app.abc123.js is shipped without cache control. For immutable versioned files, a long cache duration with immutable may make sense. Revalidate HTML separately and do not cache sensitive personal responses publicly.
What does not prove the result
Check the content encoding and cache header of the specific answer again. A no-store on private account pages may be intended and should not be removed in a blanket manner.
Deepen with PageSpeed Insights and available field data · Google's Definition of Core Web Vitals
What the Cache and Compression Checker evaluated
The pre-check evaluates the retrieved HTML and a limited sample of linked resources. It does not execute JavaScript and does not simulate user interactions. Findings are concrete occasions for an examination in the browser; an inconspicuous result does not exclude performance problems.
From a single check to Core Web Vitals Audit
The audit examines multiple URLs and helps to find recurring technical patterns in templates. This way you can see if a change affects several pages and where you can start the implementation.
Questions about Cache and Compression Checker
Is cache control always necessary?
For static assets yes, if possible with versioning. HTML is often cautiously cached or revalidated.
Why is compression important?
Gzip or Brotli significantly reduce HTML, CSS and JavaScript and speed up the transmission.
Why are there standalone tools in addition to the audit?
Individual tools help with a specific URL or technical problem. The audit compares these signals across multiple URLs and shows recurring patterns.
Is the individual check free of charge?
Yes. The standalone tools check a single URL. For larger crawls, complete tables and CSV export, the premium audit is planned.