Trying to optimize PDF in Acrobat XI to reduce the file size but it's not working. I don't get an error message but the setting don't seem to take. Standard, custom or mobile settings do not change the file size.

Report · Apr 21, 2016

Have serrated a single PDF from multiple files. Works like a charm, but I need to reduce the file size. I go to File> Save As Other> Optimized PDF and I play around with the resolution (pip) and compression. No matter what I do, the setting aren't applied to the file. After saving the file remains the same size. Tried using the standard configuration and mobile configuration and same result. Help!

Report · Apr 21, 2016

Hi Christian Starr,

Could you please let me know the OS version on the system?

Also try referring to this article : https://acrobatusers.com/tutorials/how-to-audit-and-optimize-a-pdf-file

Let me know if this helps.

Regards

Sarojini

Report · Apr 21, 2016

Running OSX 10.9.5

Made a PDF from several 144ppi .jpg images. PDF is 19MB. I need to get it down to 6MB. Reduce File Size works, bringing the file size down to under 3MB, but the quality is really bad. So, I attempted to Optimize the file by reducing the resolution to 100ppi and increasing the JPEG compression. After I do that and save... file appearance and size has not changed. Remains 19MB. Have tried the "Mobile" optimized setting too. Same result. Every adjustment I make in the Otimize File settings doesn't get applied to the file.

Oddly, I tried making another PDF from high res .jpg files and the optimization features worked.

So why does it work on a PDF created from high resolution (264ppi) images and not on a PDF generated from medium resolution (144ppi) images?

Really don't want to recreate the entire project at a different (higher) resolution if that's not necessary.

Many thanks,