Reduce PDF size without sacrificing visual quality or metadata
DietPDF aims at reducing PDF file size while not degrading quality nor losing
metadata.
Description
DietPDF aims at reducing PDF file size while not degrading quality.
Here are some tricks used to achieve this goal:
- Use Zopfli instead of Zlib to get better compression ratio while being
compatible with Zlib. - Use JpegTran to optimize and remove unnecessary data from embedded JPEGs.
- Use of Run-Length Encoding to help Zopfli achieve better compression.
- Use Zopfli on embedded JPEGs, it helps sometimes
- Remove unnecessary spaces in the PDF
- Converts end of lines to spaces in Form Objects or Contents (this helps
compression)
It also comes with extractpdf which extract all the streams contained in a
PDF file.
Notes
This program is not ready for production!
It does not support cross-reference objects for the moment.
This project