abracadabra-DocID is a plugin for Acrobat Reader


abracadabra-DocID adds a quick comparison tool that displays the « Permanent identifier » [ID] of PDF files.

abracadabra-DocID supports Adobe Acrobat Reader 7 and later versions, for Windows and Mac OS.

abracadabra-DocID is free.

abracadabra-DocID for Acrobat Pro and Acrobat Standard is part of abracadabraTools.


Download abracadabra-DocID



  • The first string is a permanent identifier based on the contents of the file at the time it was originally created; it does not change when the file is incrementally updated.
  • The second string is a changing identifier based on the file’s contents at the time it was last updated.
  • Comparing the Permanent identifier [ID] of several PDF files quickly corroborates: exactly the same, not the same at all, or a variant.



Print Friendly, PDF & Email