For now, there are only 2 open source Ethereum blockchain explorers and both of them are a bit outdated it seems.
https://github.com/etherparty/explorer
https://github.com/maran/ethereum-blockchain-explorer
Those are the only open source tools available to extract your Ethereum ldb files at the moment.
Check this StackExchange Answer for an up to date list of open source Ethereum Explorers.Check this StackExchange Answer for an up to date list of open source Ethereum Explorers.