Splitting large PDF > 300MB

[ohmy]

Hi,

I have a couple of large files that I would like to split. One is 314MB and the other is 420MB - this is after I have compressed the files.

When I run the splitter application on the 314MB file and select custom mode, it just freezes and doesn't load the pages as it normally does (>3,000 pages). Is there a max size for files or is it a limitation of my machine?

Thanks

Michael.

[Stefan Ziegler]

Please send me a download link to forum@pdf24.org (e.g. share via google drive) so that I can test this with that file. If I get the same problem, then I can fix the issue.

[ohmy]

Hi Stefan,

A few days ago I used a desktop with more power (more ram, more CPU). The 350MB file loaded slowly but all the pages appeared and I was able to split it. The 450MB file also loaded slowly (3,300 pages) and once it fully loaded the first ~2,000 pages went white on the grid (reloaded 2 times to test - same outcome), however if I click on the magnifying glass I could see them. I began to cut them in the desired file size, then the app crashed (wouldn't recognise any further cuts), loaded again still ~2,000 white pages however it let me cut the number of times required.

So essentially, I think its a performance issue.

Thanks
Michael

[PDF24 Support]

Hello,

thank you for the detailed feedback. In the Custom mode the Toolbox loads the pages as previews so that you can set the scissors. With more than 3,000 pages this needs a lot of memory, which is most likely the reason for the white pages and the crash.

What helps:

• Please update to the current version. Since version 11.28.0 the tools for splitting, merging and extracting need fewer resources for large PDFs.
• If the parts may have the same number of pages, use the mode Pages per PDF instead of Custom. It does not load page previews, you only enter the number of pages per file.
• With the next version, the Custom mode has a field Split after pages where you can type the page numbers (e.g. 3, 7, 12) instead of clicking each pair of scissors.

Splitting by file size (a new file whenever a maximum size is reached) is on our to-do list.

Splitting also works online: https://tools.pdf24.org/en/split-pdf

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