Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I would like to know what the default max-age is of an image or css file, but can't seem to find it anywhere.

Someone suggested it was only 300 seconds, but that doesn't seem to be correct.

share|improve this question
See also Caching FAQ. – vWil Dec 17 '13 at 16:43

The default is infinite.

As newer files are added to the cache, old ones are purged to make space. The file won't actually stay in the cache for ever.

The purge will cause the file to be reloaded if it is called for again.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.