How to split a long PDF image into pages

Key points of this article

Check the number of pages first before proceeding: multi-page long images can be split by pages, but page-level splitting is not possible for files with only one extra-long page.
Make a copy of the original before splitting. After splitting, open and check each file one by one to make sure each file contains only one page and the content is complete.
The image is still there after the scan is split, but to search or copy text, you need to do OCR first and check the results.
When choosing a free online tool, focus on file size limits, watermarks, whether uploaded files are preserved, and whether typesetting is preserved.

Many people export PDFs from web pages, chat logs or scanned data. The entire document only has a few pages, but each page is as tall as a long picture. Such files are inconvenient when reading, printing, or sending them to others. People who want to turn it into a page-by-page independent document and search for "how to convert a long pdf image into a page-by-page document" usually get stuck at this step.

This article talks about splitting: cutting long-page PDFs into single-page files page by page. After reading it, you will be able to judge what kind of situation your file belongs to, know what method to use, and know what to check after disassembling it. It should be noted that OmniDoc currently does not provide the function of exporting PDF into long images. What is discussed here is splitting single pages and does not involve exporting long images.

How to split a long PDF image into single pages? One sentence conclusion

First look at how many pages the document has. If the file has multiple pages and each page is typed in a long graphic format, you can use the split function of the PDF editor to split it by page. If there is only one very long page in the entire document, page-level splitting cannot cut the same page into several pages. You need to cut the content into segments first and then reassemble the PDF.

your situation	Recommended practices	reason
A PDF has multiple pages, and each page is typed in a long graphic format.	Use the split function of the PDF editor to split into single-page files by page.	The pages have been divided, splitting by page is more direct
Only one page is too long, and the content is continuous from top to bottom	Use general image tools to cut into paragraphs and then combine them into PDF	Page-level splitting cannot divide the same page into several pages
Just need a few pages	Select only the pages you need when splitting, or keep only the single page you need after splitting.	Avoid organizing irrelevant pages together
The file is a scan or screenshot PDF	First confirm whether the text can be selected, and then do OCR when the text is needed after splitting.	Splitting does not affect images, but text searches rely on OCR
Deal with it once in a while and don’t want to install software	Pick online tools that meet privacy and file size requirements	No need to install desktop software for single use

Before you start: Confirm these points first

Page count and page structure: Open the file to view thumbnails or page numbers. If there is only one page, it belongs to the second situation. Page splitting is invalid and the segmentation method should be used first.
Text version or scanned version: Try to select a piece of text in the reader. If you can select it, it means the text version. After splitting, the text can be copied directly. If you can't select it, it is mostly a scanned version. If you want to search for the text after splitting, you have to do OCR first.
Keep the original: Splitting will generate new files, so make a copy of the original before operation. Once overwritten and saved, it's difficult to go back to the original long-page version.
Privacy and File Size: Contracts, medical records, and internal information should be processed locally as much as possible. If you use an online tool, first confirm its file size limit and check whether it is watermarked and whether the uploaded file is retained.
Purpose of dismantling: If you want to print, pay attention to whether the size of the single page is appropriate; if you want to send it to others, think about the serial number sequence of the file names in advance to facilitate the other party to find it.

Steps to split long page PDF by page in OmniDoc

Open download.omnidoc.top to download the desktop client, install and start it. A PDF editor is included with the client.
Make a copy of the long-page PDF that needs to be split as a backup, and then only work on the copy.
Open the copy with a PDF editor and confirm the total number of pages first.
Find the split function in page operations. It belongs to the same type of operations as insertion, deletion, rotation, rearrangement, and merge.
Select Split by Page to generate a separate PDF for each page. If you only need a few pages, select only those page numbers.
Specify the save location and perform the split. After the split is complete, go to the save location to confirm that the new file has been generated and check whether the original file is still there.
Open the generated files one by one and confirm that each file contains only one page and the content is complete.
If you need to regroup certain pages, use the merge function to join the files in the desired order.

Check each item after completion

Check items	How to see	What to do if there is a problem
Number of files	The number of generated files is equal to the number of original file pages	The number is wrong. Go back to the split settings and confirm whether the page number is missing.
Number of pages per file	Open inspection, each file has only one page	A file contains multiple pages, which means you selected a page range instead of splitting by page. Split it again.
Is the content complete?	Check whether the bottom and edges of the page are cut off	The truncation is most likely caused by the original page itself exceeding the page frame. Go back to the original file to check, or use the segmentation method instead.
Can text be copied?	Try selecting and copying a piece of text	The text version cannot be copied, so check the original file; if the scanned document requires text, do OCR first.
Sequence and naming	The serial number in the file name is consistent with the original page number	The order is out of order. Use the merge function to reorganize it in the correct order and then check again.
Key content	Compare numbers, tables and formulas with the original text point by point	If it has been machine translated or OCR, important content should be checked point by point and do not be accepted directly.

❓ Frequently Asked Questions (FAQ)

1. How to convert a long pdf image into a single image?

If you want a single-page PDF, splitting this article by page will suffice. If you want a single image, you can first split the long-page PDF into a single-page PDF, and then use a reader or screenshot tool to export each page as an image.

2. How to convert long pdf images into page-by-page images for free?

Free methods can be desktop software or online tools. When choosing, look at four points: file size limit, whether to add watermarks, whether to keep the files you upload and for how long, and whether to keep the layout after splitting. Sensitive documents such as contracts or medical records will be processed locally first.

3. Can the PDF be exported into a graph?

OmniDoc currently does not provide the function of exporting PDF as long image. If you need a long image, you can use the screenshot function of the reader or use a general long image splicing tool to stitch together multiple pages of content in order.

4. Can text be searched after the scanned long image PDF is split?

The splitting itself does not generate a text layer, and the scanned document remains an image after being split. When you need to search or copy text, perform OCR on the file first, and then check the recognition results, especially the numbers and tables.

📝 Summary

How to convert a long pdf image into a page-by-page format? The key is to look at the number of pages first: multi-page long images can be split by pages, and documents that are only one page long must be cut into segments and then combined. Backing up the original before splitting, and checking the number of pages, content and text one by one after splitting, can avoid rework.

Open OmniDoc and use the PDF editor to work with your document