That is fine in contexts where a wrong guess does no harm. But that is not always the case, and e.g. silently "fixing" text encoding issues can often corrupt t

That is fine in contexts where a wrong guess does no harm. But that is not always the case, and e.g. silently "fixing" text encoding issues can often corrupt the data if you get it wrong. By all means offer options of you want, but if you do flag very clearly to the user that they're taking a risk of corrupting the data unless any errors are very apparent and trivial to undo.