Quote from another topic:
Thanks is there a tool i can use to recover ? as i must have missed a few characters off or could someone help me via private message as i do not want to disclose it on here !!
You could use
The FinderOuter. Compile it from source code or download the released version, run it offline. The program only has 2 options for now and you need the second option ("Missing Base58"). I believe the rest is self explanatory.
It should take a second to find the right key(s) with 3 missing characters.
I'm trying to recover JBRai's private key with 49 out of 52 characters known. I've installed The FinderOuter (in a VM), but it asks for the locations of the missing characters.
Any chance you can add a loop to search all possible locations for the 3 missing characters? That is, assuming the rest of JBRai's key is correct.
I've tested it with a known key: it takes about 2 seconds to find 3 missing characters. To do the same on 3 unknown locations would take about 58^3 times longer, which means several days, but it'll still be manageable.