This web tool allows you to upload a PDF document, have it scanned for links (URLs) and produce a report of which links may be broken.
 
A couple of things:

• This is a free tool. You don't need to register, sign-in, or opt-in to anything.
  
  Unless the file is huge, you will get a report on the screen within a minute or two. It will include a list of possibly broken links, the website's error codes and other useful info that you can do with as you please.
   
  
• If you include your email addreess, the report will also be mailed to along with a link where the report will be stored for up to 3 days. (This is helpful if, in fact, the file is huge or if it has several broken links.)
   
  
• No other information is required, nothing will be used for any other marketing purposes, yadda yadda.
   
  
• Why free? A teacher needed a way to check links in PDFs - this is it. No muss, no fuss, no marketing followup or SPAMs.
  
  However, if you find this tool useful, you can feed our coders via a donation.

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Enjoy!