Quick tool to anonymize data or passwords or something. It is purely
offline, nothing is sent to the server. Be sure to load the page over https
to ensure its integrity if you're really paranoid, or disconnect from
internet and reconnect only after closing the tab.

What it does is changing characters, for example a password "h5N1" could
become "a5Q3". The entropy is preserved, but otherwise entirely randomized.
This can be useful when you want to check how strong your password is on
howsecureismypassword.net, or when you want to ask someone what encoding
some data is (such as base64 or rot13), or whatever your use case may be.

Any characters that need to be preserved can be entered in the designated
field. For example if spaces need to remain intact, enter a space there.