HashApp
python software for cracking and creating SHA and MD5 hashes
...://raw.githubusercontent.com/dwyl/english-words/master/words.txt').read(), 'utf-8')
Change the url in the urlopen function and replace all instances with your version of the above line.
If you want to use a txt dictionary stored in your computer, then, well, nothing. Unless the word search fails with the online dictionary, you can't use a txt dictionary. But don't worry; you just have to store your txt on github (like the default dictionary above).