Hello friends. I have a certain private key list, there are approximately 5000 keys. It takes time to check all these one by one. is there a software for this?
I know of a tool that can help you check the balances of multiple Bitcoin addresses. However, it only works with addresses, not private keys. It is called "Bulk address checker" and you can find it
here.
Can I upload my private key list and perform balance check or address matching?
If you upload your private keys anywhere online, then they are no longer private.

How about importing them in bulk into the Electrum wallet and letting it sync? It probably cant handle 5000 private keys at once, but it is still much faster than checking the keys one by one.