You could do the same thing you've been doing to recover the wallet on Electrum or maybe Bitaddress[1] (download the source code first), you should just make sure that the device you're using is offline and safe.
[Guide] How to Safely Download and Verify ElectrumBecause OP is a tech guy and serious about security, it's applicable for him to verify Electrum wallet before using it (offline or online, should be offline).