Cache-Control Checker
Parse a pasted Cache-Control header and flag conflicts.
Runs in your browser. Nothing is uploaded — your input is processed on this device and discarded when you close the tab.
Cache-Control Checker
How to use this tool
- Enter your values in the fields above.
- Press Generate to see the result.
- Use Load sample to try the worked example, Copy result to copy it, or Clear to start again.
Worked example
The sample header has 3 directives, no conflicts, and is cacheable for 3600 seconds (1 hour).
What this tool does not do / Limits
This parses only the header value you paste. It does not check a live site or server response.
Frequently asked questions
What conflicts are flagged?
public with private, and no-store with a positive max-age.
Are unknown directives errors?
No. They are listed as notes, not failures.
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