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Is there a way to import my wallet from Bitcoin.org's client into the much lighter Multibit or Electrum? The disk space & bandwidth consumption (not exactly well presented to a beginner) quickly made it unfeasible on home computers.

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    Of course, you can easily transfer the funds from your Bitcoin.org client over to an address in any other wallet.
    – Stephen Gornick
    Dec 22, 2011 at 20:41

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Speaking as one of developers on MultiBit, it is not currently implemented at the time of writing (Dec 2011) but there are serious development efforts to consolidate the wallet file format to suit all major Bitcoin clients.

Expect to see this functionality in Q1 2012.

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    THankya. For now I just copy&pasted my receiver address when GUI offers possibility, otherwise into ini files if (hopefully) stored plaintext.
    – Marcos
    Dec 22, 2011 at 15:06
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Not technically the answer to this question but a much more ideal solution for me was to switch over to an online wallet keeper altogether like at http://blockchain.info

Though I've known about online wallets for a while (though not soon enough whence I still struggled to keep bitcoin "clients" being useful and playing nice with their host PCs, thinking it was the only way to control my BTC when I was new) it wasn't until recently that I figured out how to use their Import wallet feature and apply the buried old wallet.dat files, which for me wasn't trivial:

pywallet.py -dumpwallet

However to get that Python code to finally operate without cryptic errors on a fresh Ubuntu 11.10 Linux required some extra research and package dependencies troubleshooting.

Now, thankfully, bitpennies that continue to arrive at my original BTC address (from the now purged software clients) eventually make it to my online wallet hosting a few BTC addresses, whose funds I could freely transact from there if I want to. No manual transferring from my old address, good.

Last I updated and tried launching again one of those clients it stalled and absolutely PEGGED the network trying to finish its per-design 2-3GB blockchain download before allowing me to do anything (else on the PC, let alone transactions) which didn't seem to be advancing anyway no matter how long I let it eat my PC or how many times I restarted. Where of course that much disk space couldn't be spared, nor shared bandwidth, nor CPU & memory resources it took that PC. 3GB win7 AMDx64, mind you.

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  1. download bitcoin-tools(python wallet-reader)
  2. export the privatekeys.
  3. import them, at a wallet site blockchain.info
  4. export json format private key
  5. import json key from Multibit
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  • or just send bitcoins from blockchain.info to your Multibit
    – diyism
    Aug 5, 2012 at 14:39
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    You are suggesting to send your private keys to a site on the internet. This is very very not recommended.
    – Jan Schejbal
    Apr 13, 2013 at 8:12

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