PDF Filter

From Okapi Framework
Jump to navigation Jump to search


The PDF Filter is an Okapi component that implements the IFilter interface for PDF files.

Warning: This is a filter does not merge back into PDF format. instead it produces a plain text file output upon merging.

Processing Details

Input Encoding

PDF files are binary files and do not have a specific encoding. Okapi extracts all text from the PDF as a Java string and forces the encoding to be "UTF-16". Any encoding selected in tools like Rainbow will be ignored.


TextUnits are created following the default rules of the Plain Text filter. That is, any text followed by a newline will create a new TextUnit or paragraph.


This filter has no parameters.


  • This filter merges back in plain text format, not PDF.