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Flatten a PDF

For Android, available in the full version of the library only. See PDFTron full or standard?

To flatten a PDF using default settings.

PDFDoc doc = new PDFDoc(filename);
Flattener fl = new Flattener();
fl.Process(doc, Flattener.FlattenMode.e_fast);

Compress & optimize PDF files
Full code sample which shows how to use 'pdftron.PDF.Flattener' by simplifying page content (e.g. flattening complex graphics into images) while maintaining vector text.

linkAbout PDF flattener (or mobile PDF optimizer)

PDF Flattener component (pdftron.PDF.Flattener) can be used to speed-up PDF rendering on mobile devices and on the Web.

PDF documents can frequently contain very complex page description (e.g. thousands of paths, different shadings, color spaces, blend modes, large images etc.) that may not be suitable for interactive viewing on mobile devices.

Flattener can be used to speed-up PDF rendering on mobile devices and on the Web by simplifying page content (e.g. flattening complex graphics into images) while maintaining vector text whenever possible.

A quick way to try Flattener is by using DocPub CLI (e.g. docpub -f pdf my.pdf).

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