Yesterday we covered some tips on managing disavow link file issues with syntax issues, encoding issues, etc of the URLs. So after, as I expected, the webmaster community asked why doesn't Google have a tool to test to make sure the disavow links file you are uploading is valid.
Glenn Gabe asked John Mueller just that and John said that most sites don't have an issue, thus there is no need for such a tool.
Here are the tweets:
@glenngabe Luckily most sites don't need to bother with that, so I don't see that functionality changing significantly.
— John Mueller (@JohnMu) June 9, 2016
John wrote, "luckily most sites don't need to bother with that, so I don't see that functionality changing significantly."
So I guess Google has no plans for a disavow link file testing tool.
Forum discussion at Twitter.