There are at least two types of manual device which can do it. This one - where a strap adjusts to fit the rim of the lid and then a lever action is used. I have this exact one and it works really well:
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Or the other type which has holes of various diameters to grip lids:
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I think there may be other types but both the above work quite well.
As fo doing it without a device - where the issue is a vacuum (sometimes this happens with preserves or pickles) I've been known to piece the lid. This of course means you then have a damaged lid!
If its a small spice jar and you don't have any other device a pair of pliers or an adjustable spanner might work.