Fuzzy max-age Calculator

Cache-Control’s max-age directive accepts a duration in seconds, but seconds aren’t particularly human-friendly. This calculator allows you to specify max-age in much more palatable terms and end up with a compliant max-age format. Alternatively, you can paste an existing max-age value and get its human-friendly equivalent.

Give it a go!

Enter a time period (e.g. ‘a day’, ‘eight weeks’, ‘6 months’, ‘10 seconds’, ‘forever’) or seconds (e.g. 3600):

• Cache-Control:
• Human-friendly version:

Disclaimer: This max-age calculator aims to provide convenient and human-friendly conversions between time periods and cache durations. While I strive for accuracy, there may be edge cases or unexpected behavior in certain input formats. As this tool interprets natural language and various time units, I encourage users to verify important calculations and be mindful of potential inaccuracies in highly complex inputs. I welcome feedback and suggestions! If you encounter any issues, or if you’d like to contribute improvements, please feel free to submit them to the GitHub repo at github.com/csswizardry/csswizardry.github.com.