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I used litecoin-qt back in 2014, and used the backup feature, which gave me a wallet.dat file... Now i want to extract the private key from the wallet.dat file so it can be used in electrum. I do not have a litecoin-qt installation. It seams like a very bad idea anyway to keep cryptocoin backups in a fileformat that depend on particular wallets etc...
Since Litecoin-Qt is essentially the same as Bitcoin Core, this question is closely related to How can I transfer a Bitcoin-qt wallet to Electrum?. AFAIU, you will probably have to install Litecoin to extract the keys.
– Murch – 2017-03-17T17:06:29.403