How to convert colour of listed pages in one shot?

Report · Jan 16, 2019

Hi,

I have a pdf document with 1000 pages.

800 pages is in colour, 200 black and white and I wish to reduce colour pages to 500 pages.

I have a list of selected pages that need to be in colour and I also have a list of pages that should be black.

There is an option to convert colours in Adobe but there is no way to paste a list of pages and you can not select thumbnails neither and then convert.

You can only give a range page 1-1000 for example or give a single page number but you can not ask for conversion of pages for example: 3,5,7, 25, 80, 500 and convert them all in one go.

I heard that Java could handle such a task but unfortunately I can not find good example.

If there would be some plugin being able to perform such task that would be great!

Thank you for your answers.

Report · Jan 16, 2019

leom97743845 wrote
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I heard that Java could handle such a task but unfortunately I can not find good example.
...

Not possible. Acrobat doesn't use Java.

Report · Jan 16, 2019

You probably meant JavaScript. And yes, there's is a method in Acrobat JS to convert the color of a page. It's called colorConvertPage. See more information about it in the Acrobat JS API Reference. You can use it to convert one page at a time.

It does have a small bug, though. It doesn't actually return a value when you use it.