HTTP Cache Policy Analyzer
Calculate explicit HTTP freshness from supplied response headers and timing.
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How to use HTTP Cache Policy Analyzer
Calculate explicit HTTP freshness from supplied response headers and timing. The calculation combines Date, Age, response delay, resident time, max-age/s-maxage or Expires. Shared/private and no-cache/no-store effects are reported separately.
- Provide the input and select the documented mode or options.
- Run the tool and review its result and any limits reported below.
- Copy the text result or download a separate output file.
Good to know
- Only explicit freshness is estimated; heuristic expiration, status eligibility, Vary, authorization and request directives are outside scope.
- 10,000 header characters. Duplicate age/date/expires or duplicate cache directives are rejected; timestamps must be ordered.
- Processing happens in this browser tab. Inputs and results are not automatically saved or uploaded.
Common questions
What does HTTP Cache Policy Analyzer process?
The calculation combines Date, Age, response delay, resident time, max-age/s-maxage or Expires. Shared/private and no-cache/no-store effects are reported separately.
What happens to my original input?
The tool creates a separate result. Selected files and pasted data remain on this device; inspect the result before using it in another system.
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