For 10+ years I've been using pixresizer. It's about the best I've found and also allows batch conversions for multiple photos. Not only will it resize but you can drop the file sizes down too where a 640 X 480 jpg will be around 25KB.
No idea if there's 64 bit support as I'm still running XP 32.
Here's a link to the latest version.
https://pixresizer.en.softonic.com/d...SAAEgK-6_D_BwE