Many PDFs have fixed layouts, but the text can still be selected and copied. This article focuses on the office requirement of "batch creating PDFs where text cannot be directly copied," explaining how to use HeSoft Doc Batch Tool to convert each page of multiple PDFs into image format and continue outputting PDF files. The article includes applicable scenarios, before-and-after comparisons, detailed operation steps, and notes, helping users efficiently complete anti-copy processing before distributing materials.
Many people think that once a PDF file is exported into a fixed layout, the text cannot be copied. This is not actually the case. A large number of PDFs exported from Word, docx, doc, Excel, PPT, or layout software still retain a text layer internally. After opening the file, the recipient can select text with the mouse, right-click to copy, and then paste it into other documents, web pages, or chat windows.
If you are preparing course materials, internal documents, product descriptions, exercises, vocabulary lists, quotation materials, or external preview versions, you may encounter this need: the file should be readable and printable, but the text should not be easily copied by others. The method introduced in this article is to batch convert PDF pages into images, i.e., converting the content of each page in the PDF into an image format and then outputting it as a PDF file.
The software used in this article is HeSoft Doc Batch Tool . As can be seen from the software interface, it is a tool oriented towards the batch processing of office files, including categories like PDF Tools, Word Tools, Excel Tools, PowerPoint Tools, Image Tools, etc. For scenarios where multiple PDFs need unified anti-copy processing, it can reduce a lot of repetitive work and improve processing efficiency before document distribution.
Applicable Scenarios: When to Convert PDF Pages into Images
Converting PDF pages into images is not necessary for all files, but it is very common in the following scenarios. First, training materials or course handouts need to be sent to students for reading, but you do not want entire sections of content to be directly copied. Second, internal company regulations, process descriptions, or reference materials need to be circulated across departments, but you want to reduce the likelihood of text being casually extracted. Third, product introductions, price descriptions, sample chapters, or template files sent externally are intended for viewing only and should not be easily reused.
Fourth, when schools, educational institutions, publishing houses, or content teams release review materials, vocabulary lists, or sample test questions, they want to maintain the page layout while reducing ordinary copying. Fifth, positions in design, consulting, legal, and finance need to send read-only PDFs to clients, hoping the recipients can view the content but cannot directly copy the internal wording or structure.
If there is only one PDF, manual processing might be acceptable; but when there are multiple PDFs in a folder, opening, exporting, and synthesizing them one by one is very inefficient. As shown in the screenshot before processing, a folder already contains multiple PDF files like 1.pdf, 2.pdf, 3.pdf, 4.pdf, 5.pdf, which is exactly the scenario where batch processing software is suitable to play a role.
The value of batch processing lies in unified rules, unified output, and reduced omissions. Users only need to confirm the list of PDFs to be processed, and the conversion of pages into images can be completed at once, avoiding the need to repeatedly switch between different software.
Effect Preview: From Copyable Text to Viewable Image-Type PDF
First, let's look at the state before processing. In the PDF page below, the text can be selected with the mouse, and options like "Copy" and "Copy with Formatting" appear in the right-click menu. This indicates that the English words and definitions in the PDF are not just simple pictures, but recognizable and selectable text objects.
This type of PDF is very convenient for reading, searching, and citing, but if your goal is to publish read-only materials externally, it is not secure enough. Anyone who opens the file can copy the text into Word, docx, TXT, web editors, or other office software just by selecting the corresponding text. For materials where the method of content distribution needs to be controlled, this is clearly not the ideal state.
After processing with "Convert PDF Pages to Image Format," the page appearance basically remains the original layout style, but the text has become part of the image content. From the processed screenshot, it can be seen that the right-click menu shows image-related options like "Copy Image," "Save Image As," and "Edit Image," instead of directly copying text. The page is still in the PDF reading interface, but the content layer has changed.
This is the core effect of converting PDF pages to images: allowing the document to continue being distributed in PDF form while preventing ordinary readers from directly copying text like they would with a text-based PDF. This method is very suitable for users who need to batch produce "read-only PDFs," "anti-copy PDFs," or "PDFs with non-directly-copyable text."
Operation Steps: Batch Convert PDF Page Content to Image Format
Below, based on the actual interface in the software screenshots, we introduce how to complete the operation in HeSoft Doc Batch Tool . The overall process can be summarized into four stages: select function, import PDFs, confirm list, set output and start processing.
Step 1: Select PDF Tools on the Left
After opening HeSoft Doc Batch Tool , first observe the left navigation bar. The interface lists multiple office file processing categories, including Word Tools, Excel Tools, PowerPoint Tools, PDF Tools, Text Tools, Image Tools, etc. Since the processing objects this time are PDF files, you need to click "PDF Tools" on the left.
After entering PDF Tools, the right side will display multiple PDF-related function cards, such as Add Page Numbers, Extract Pages, Add Page Margins, Add Page URL Links, Remove Links in PDF, Crop PDF Pages, Reverse Arrange PDF Pages, Flatten PDF, Delete PDF Blank Pages, PDF to Word, etc. Different functions are suitable for different tasks; what needs to be selected in this article is "Convert PDF Pages to Image Format".
Step 2: Click the "Convert PDF Pages to Image Format" Function
Find the function numbered 22, "Convert PDF Pages to Image Format," in the function list. This card is highlighted in the screenshot, and the tooltip description states: Batch convert each page of a PDF into image form and still output a PDF file, preventing text and content from being directly copied.
This step is very critical because it determines the final output format. Do not confuse it with "PDF to JPG Image." The latter usually exports PDF pages as individual image files, whereas the goal here is to still obtain a PDF file, but with the PDF page content converted into image form. For office scenarios that still require sending, archiving, and printing via PDF, choosing "Convert PDF Pages to Image Format" is more suitable.
Step 3: Add Files or Import PDFs from a Folder
After entering the function page, you can see two main import entries at the top: "Add Files" and "Import Files from Folder." If you only need to process a few specific PDFs, you can click "Add Files"; if all PDFs are concentrated in the same folder, using "Import Files from Folder" will be more efficient.
The screenshot shows that 5 PDF files have been imported. The table displays the number, name, path, extension, creation time, modification time, and an operation column. The file names are 1.pdf, 2.pdf, 3.pdf, 4.pdf, 5.pdf, with the path located in the test directory on drive D, and the extension is pdf for all.
The purpose of this step is to create a processing queue for the PDFs you want to convert to images. The expected result is: all target PDFs appear in the table list, and the record count matches the actual number of files. The bottom of the screenshot shows "Record count: 5", indicating that the software will now execute the same batch processing action on 5 PDFs.
Step 4: Check Pending Records and Remove Incorrect Files
In a batch task, do not rush to click the next step after importing. It is recommended to first check the file names and paths to confirm that no incorrect files have been added. For example, some office directories might contain similar files like "Final_Version.pdf", "Revised_Version.pdf", "Draft.pdf", "Client_Version.pdf". Accidentally processing a draft file can cause confusion during subsequent distribution.
A delete icon can be seen in the operation column on the right side of the list. If a file in a certain row does not need to be processed, it can be removed through this operation. There is also a "Clear" button at the top, suitable for reselecting when the entire list is imported incorrectly. You do not need to open each PDF individually here; just complete the file-level confirmation within the list.
Step 5: Click "Next" to Enter the Save Location Settings
After confirming the list of PDFs to be processed is correct, click the "Next" button at the bottom. The process prompt at the top of the interface shows that the current function is divided into three steps: Step 1 select the records to process, Step 2 set the save location, and Step 3 start processing. The screenshot is currently on step 1, so clicking "Next" will lead to the save location settings.
The purpose of setting the save location is to specify the output directory for the processed PDF files. It is recommended to save the processing results to a new folder, not mixing them with the original PDFs. For example, you can create new folders like "Imaged_PDF_Output", "PDF_Anti-Copy_Version", or "Read-Only_PDF_Version". This not only facilitates comparing the effects before and after processing but also avoids accidentally overwriting original files.
In office workflows, retaining the original PDF is very important. Because after the pages are converted to images, the original text layer is usually no longer suitable for copying, searching, or secondary editing. If the content needs to be modified later, you should go back to the original Word, docx, Excel, PPT, or original PDF for editing, and then regenerate the image-based version.
Step 6: Start Processing and Open the Result File for Verification
After setting the save location, enter the "Start Processing" stage. The software will batch process the multiple PDFs according to the list, converting the content of each PDF page into image form and outputting new PDF files. After processing is complete, it is recommended to open one of the output files to check the effect.
You can perform three checks. First, flip through the pages to see if they are complete and if the layout is normal. Second, try to use the mouse to select text, and confirm whether you cannot select words or sentences like you could before processing. Third, right-click to view the menu; if image-related operations like "Copy Image" appear, it indicates that the page content has been converted to images.
After completing the verification, use the PDFs in the output directory for external distribution or archiving. For a large number of files, it is recommended to spot-check PDFs with different page counts and layouts, especially documents containing tables, images, page numbers, headers, and footers, to ensure the display effect meets expectations.
Frequently Asked Questions and Precautions
1. Does converting pages to images affect PDF clarity?
After pages are converted to image form, the display effect is usually close to the original page, but clarity is related to the conversion method, page content, and viewing scale. It is recommended to test with a sample document first, especially for PDFs containing small fonts, table lines, formulas, or complex graphics. If the output effect meets reading needs, then batch process all files.
2. Can images in the processed PDF still be copied?
From the processed screenshot, you can see that options like "Copy Image" and "Save Image As" may appear in the right-click menu. This means that users might copy the page image, but cannot directly copy the text on the page as they could before processing. In other words, this method primarily prevents ordinary text copying, not all forms of screenshots, photos, or image saving.
3. Can OCR still recognize the text?
This possibility exists. After the PDF page is converted to an image, if the other party uses OCR recognition software, they might still recognize text from the image. Therefore, it is suitable for reducing the difficulty of ordinary copying, not for absolute leak prevention. For important trade secrets, sensitive contract clauses, personal privacy information, etc., it should also be combined with permission controls, watermarks, desensitization processing, and file distribution management.
4. Why not just encrypt the PDF to restrict copying?
PDF permission restriction is a common method, but different readers may not enforce permissions completely consistently, and some users might bypass them through other means. The idea of converting pages to images is different; it directly changes the page content structure so that text no longer exists as ordinary text objects. For most office distribution scenarios, this method is more intuitive and easier to verify the effect.
5. Do I need to back up the original files before batch processing?
It is strongly recommended to back them up. Whether it is PDF page imaging, PDF compression, PDF to Word, PDF to PPT, or other batch processing tasks, you should retain the original files. Batch processing is highly efficient, but if incorrect files are selected or originals are overwritten, it can also amplify the impact of errors. The standard practice is: save the original files separately, and output the processing results to a new directory.
6. Which file formats is this method suitable for?
This article introduces processing for PDF files. If your source file is a Word document, such as docx or doc, it is recommended to export or save it as a PDF first, and then use "Convert PDF Pages to Image Format" for processing. If the source file is an Excel spreadsheet or a PowerPoint presentation, you can also generate a PDF read-only version first, and then perform page imaging. This way, the final distribution format is unified, and the reading experience is also more stable.
Summary: Quickly Generate Read-Only Anti-Copy PDFs with Batch Processing Tools
The core idea for batch creating PDFs where text cannot be directly copied is to convert the content of the PDF pages into image form. Before processing, the text in the PDF can be selected and copied; after processing, the page content is still readable, but the ordinary right-click method to copy text becomes ineffective, making it more suitable as a read-only file for external distribution.
HeSoft Doc Batch Tool has made this type of operation a clear PDF function entry. Users only need to enter PDF Tools, select "Convert PDF Pages to Image Format," batch add PDF files, confirm the list, set the save location, and start processing to complete the page imaging of multiple PDFs at once. Compared to manually processing files one by one, it can significantly save time and reduce repetitive work, especially suitable for office scenarios with a large volume of materials.
If you are preparing a batch of PDF materials that need to be sent to external parties, it is recommended to first test the effect with a sample document, and then batch process all files. After processing is complete, keep the original PDFs for internal retention and subsequent editing, and use the image-based PDFs for sending, archiving, and reading display. This not only maintains office efficiency but also better controls the risk of text content being directly copied.