Old & unused cookie cleaner?

[steaua10]

steaua10 last edited by steaua10

Is there a way to clear old & unused Opera cookies (may be also a third party tool for other browsers as well)?
My Opera installation is very old (some 5-10 years) and I have a huge amount of cookies saved for some 10.000 websites. I'd like to preserve the most recent cookies (from the last 1 year), but to remove the one older than 3 years and if possible to filter them by used/unused to remove only those unused. Some websites I accessed only one or a few times several years ago so such data I don't want to keep.
Note that I don't want to loose the hostory, maybe only the associated entries. And I don't want to loose recent cookies.