Methods and tools for merging folder files for free

Key points of this article

Merging multiple PDFs into one can be done using page operations in the PDF editor of the OmniDoc desktop client. After merging, you can also adjust the order and delete pages.
It is recommended to insert and merge editable files such as Word and PPT; when a unified format is required for submission, convert them to PDF first and then merge them.
Add serial numbers to files and unify mixed formats into PDF before merging, which can reduce leakage and layout confusion.
When choosing a free tool, focus on file size limits, whether watermarks are added, whether formatting is preserved, and privacy instructions on how files are processed.
After the merger is completed, check whether the number of pages is equal to the sum of the number of pages in each document, and check the order, missing pages, and text recognition results of the scanned document.

Many of us have a folder with a dozen PDFs, several Word copies, or a batch of scanned pictures scattered inside. When submitting materials, filing or printing, you need to merge them into one file. Readers who search for "free software to extract and merge folders" probably want to know two things: how to merge these files into one, and whether there is a cost-effective and hassle-free way.

This article talks about specific methods. PDF merging takes the PDF editor of the OmniDoc desktop client as an example; there is no unified operation for other formats such as Word and PPT, and general ideas will be discussed. After reading, you will be able to judge which method to use and know where to check after merging.

How to merge multiple files in a folder into one? One sentence conclusion

To merge multiple PDFs, use the merge function directly in the PDF editor to save trouble. For files such as Word and PPT that need to be edited, it is recommended to merge them by inserting them. When you need to submit documents in a unified format, convert them all to PDF first and then merge them.

your situation	Recommended practices	reason
Multiple PDFs to be submitted or archived	Merge in the PDF editor of the OmniDoc desktop client	The page operation has a merge function. After merging, you can also adjust the order and delete redundant pages.
Multiple copies of Word need to be modified after merging them	Use desktop office software to create a new document and insert files one by one	The result is still in Word format, making it easy to continue modifying the text.
Scan or photo	Convert to PDF first, do OCR if necessary, and then merge	After merging, you can search and copy text for easy checking.
Mixed formats (Word, PDF, images)	Convert to PDF in a unified manner and then merge in order	The layout is stable and avoids inconsistency when opening different software.
I just want to send it to others temporarily	After merging into PDF, check the file size before sending.	If the file size is too large, the other party may not be able to receive it successfully.

Before you start: Confirm these points first

Spending two minutes preparing before taking action can save you a lot of detours.

Classified by format. Separate the files in the folder by PDF, Word, and pictures. The more unified the format, the more stable the layout; when merging mixed formats, the same content may be paginated differently in different software.
Add serial number to the file. Add serial numbers such as 01, 02, 03 before the file name, and add them in order when merging, so that they are not easily missed or misplaced.
Confirm which files are scanned. Open the PDF and try to select a piece of text with the mouse. If you cannot select, you can only select the whole page image, usually a scanned copy, and you need to check the text content after merging.
Check for sensitive content. For documents such as contracts, certificates, financial materials, etc., you must first read the privacy statement of the tool you are using to understand whether the file will be uploaded and how long it will be stored before deciding whether to use the online tool.
Look at the restrictions when choosing free tools. Common limitations of free tools include maximum file size, page limit, whether the output file is watermarked, and whether the layout is intact. It is more important to confirm these items before choosing a tool than just looking at the word "free".

Steps to merge multiple PDFs in OmniDoc

OmniDoc desktop client (download address: download.omnidoc.top) has a built-in PDF editor, in which page operations support insertion, deletion, rotation, reordering, merging, and splitting. Follow the steps below to combine multiple PDFs in a folder into one.

Download and install the OmniDoc desktop client, available for Windows, macOS, and Linux.
Open the PDF editor and import the first PDF sorted by serial number in the folder.
Select the merge function in the page operation and join the remaining PDFs in sequence. If there are many files, it is recommended to add them in batches, and check the page number each time you add one.
Check the merged results in file order. If there are pages that are in the wrong position, use the adjust order function to move them to the correct position.
If a document has extra blank pages, old covers or duplicate pages, use the Delete Page function to remove them.
Check the total number of pages to make sure it is equal to the sum of the number of pages in each file, and then export it as a PDF file.
Save as a new file name, keep the original file as a backup, do not overwrite the original directly.
If you need to modify the text later, you can export the results to Word format and continue editing in office software.

Check each item after completion

After the merger is completed, don’t rush to send it out. Check it item by item to avoid crossing materials.

Check items	How to see	What to do if there is a problem
Number of pages	Is the total number of pages after merging equal to the sum of the number of pages in each file?	Compare the number of pages of each original document to identify missing or extra documents
Page order	Read them one by one to see if the chapters and attachments are arranged as expected.	Use the reorder function to move pages and check again
Complete content	Whether the beginning and end of each document are	Check whether a certain part was skipped during the merge and add it additionally
typesetting	Are tables, pictures, and formulas misplaced or missing?	Return to the original file to confirm whether there are any layout problems; if necessary, use a unified format before merging.
text recognition	After merging the scanned documents, can the text be selected and whether the key numbers are correct?	Verify it section by section against the original; machine recognition may make mistakes, and important content must be confirmed manually.
Watermark and size	Whether unexpected watermarks appear and whether the file size is appropriate	If the watermark affects the use, switch to the method without watermark; if the size is too large, reduce unnecessary pages or pictures.

🎯 Which method is suitable for you?

PDF users who want to submit or archive: Prioritize merging in the PDF editor, and finally export it to a PDF. The page order and layout are easy to control.
Document users who need to continue to modify: It is recommended to insert and merge the Word files and keep them editable; after the modifications are completed, export the PDF together.
Users who process scanned documents: Do OCR first and then merge. After merging, check the recognition results page by page, especially the amount, date and number.

❓ Frequently Asked Questions (FAQ)

1. Will the file become large after merging?

Will become larger, especially when multiple files contain high-definition images. After merging, you can delete unnecessary pages and then check the file size; before sending, you should also check the size limit of the other party's mailbox or platform.

2. Can I select the entire folder at once and merge it directly?

It is recommended to first select the files to be merged, put them in the same subfolder, and then add them one by one in order. When there are many files, merging them in batches and checking the number of pages one by one is less error-prone than merging them all at once.

3. Will the original files be modified after merging?

Normal merge operations generate new files. For the sake of safety, it is recommended to save it as a new file name when exporting and keep the original file for easy review at any time.

4. What should I do if the free tools are watermarked after being merged?

First confirm whether the watermark affects use. If it is affected, you can change to a tool that does not add watermarks and clearly explains the restrictions, or obtain a version without watermarks through formal channels. Do not use informal methods such as removing watermarks.

📝 Summary

To merge files in a folder, the key is to first select a method according to format: use the merge function for PDF, use insert merge for editable files, and unify mixed formats into PDF first. When choosing a tool, pay attention to the file size, watermark, layout and privacy statement. After merging, check the number of pages, order and content one by one, and you can hand it over with confidence.

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