Want to uniformly delete certain text across multiple PDFs? You can use the PDF find-and-replace approach, replacing specified keywords with nothing. This article demonstrates the complete process using HeSoft Doc Batch Tool : from the PDF tool entry, select the find-and-replace function, import multiple PDF files, set precise text searching, enter the content to be removed in the keyword list, and leave the replacement list empty. After processing, the target text in the PDFs will be cleared—ideal for batch removal of dates, numbers, names, and fixed text.
Many office documents are archived, circulated, or published externally after being generated as PDFs. However, before release, it is often necessary to uniformly remove certain text content, such as dates, years, project numbers, internal company abbreviations, test fields, or descriptions that should not be disclosed. If this text is distributed across multiple PDFs, manually opening each PDF to process it is not only inefficient but also prone to omissions due to repetitive work.
This article introduces a more suitable approach for batch office tasks: using HeSoft Doc Batch Tool , through the "Find and Replace Keywords in PDF" function, replace specified keywords with empty values, thereby uniformly deleting text content across multiple PDFs. This tool is a batch document processing office software, primarily designed to address issues of large file volumes, repetitive operations, and time-consuming manual work.
In the example below, we have 4 PDF files, and we need to delete "April" and "2017" from the pages. After processing, the locations of these two keywords will become blank, while other content not set as keywords will remain.
Applicable Scenarios: Tasks requiring batch removal of fixed keywords in PDFs
If your needs match the following characteristics, the method in this article is highly suitable: First, the files to be processed are in PDF format; Second, identical or similar fixed text exists across multiple PDFs; Third, you aim to delete keywords, not entire page content; Fourth, you want to maintain the original PDF layout as much as possible, without wanting to convert PDFs to Word, docx, or doc and then reformatting them.
Typical scenarios include: batch removal of cover dates on reports; deleting internal project codes from external materials; cleaning up placeholders in PDF templates; deleting old version numbers from multiple manuals; uniformly removing names, numbers, or organization names for document anonymization. Compared to manual operation, the advantage of batch processing is that rules are set only once, and the software subsequently applies them automatically to all files.
Before processing, you can see that the files to be processed this time are 4 PDFs. Although the number of files is not exceptionally large, it already demonstrates the value of batch processing; if the file count expands to dozens or hundreds, the time saved would be even more significant.
Preview Before Processing: Keywords still displayed on the PDF page
Opening the PDF before processing, the page shows "April 13, 2017". This time, the two keywords to be removed are "April" and "2017", which are marked with a red box in the screenshot. The key point here is: we do not want to delete the entire date line, nor damage the title, report number, or stamp on the page, but only want the specified words to disappear.
If done manually, this requirement usually involves searching for the keyword in each PDF, then locating the corresponding page, and then editing or masking. While acceptable for a small number of files, the steps are too repetitive for batches of PDFs. Using find-and-replace for batch deletion can transform these repetitive actions into a one-time rule setup.
Preview After Processing: Specified keywords removed in batch
After processing, viewing the PDF page shows that "April" and "2017" are no longer displayed, their original positions becoming blank areas, while "13," is still preserved. This result indicates that the software did not delete the entire segment of content but executed the deletion according to the set keyword list.
For those needing precise text cleaning in PDFs, this processing method is more flexible than directly deleting pages and more efficient than manual file-by-file editing. As long as the keywords are set accurately, the same rule can be applied to all imported PDF files.
Step 1: Open the PDF Tools Category
First, launch HeSoft Doc Batch Tool . On the left side of the main interface, you can see multiple tool categories, including Word Tools, Excel Tools, PowerPoint Tools, PDF Tools, etc. Since the processing target this time is PDF files, select PDF Tools.
After entering PDF Tools, find and click Find and Replace Keywords in PDF. As shown in the screenshot, this function is the first item in the PDF Tools list, and its description text points to "Batch find and replace keywords in PDF file content". This is exactly the entry point we use to delete PDF keywords.
Step 2: Add Multiple PDFs to the Processing List
After entering the function, the interface will display the current task name "Find and Replace Keywords in PDF" and guide operations step by step. Step 1 is to select the records that need processing. The upper right provides operation buttons such as Add Files, Import files from folder, Clear, and More.
If you have already organized the PDFs to be processed in the same folder, it is recommended to use "Import files from folder" to reduce the time taken to select files individually. If processing only a few scattered PDFs, you can click "Add Files". After importing, the list will display file names, paths, extensions, creation times, modification times, and other information for verification.
The screenshot shows four files—1.pdf, 2.pdf, 3.pdf, 4.pdf—have been imported, all with the pdf extension, and the bottom summary shows a record count of 4. After confirming the files are correct, click the Next button at the bottom to proceed to processing option settings.
Step 3: Select Exact Search and Enter the Keywords to Remove
In Step 2 "Set Processing Options", first set the search method. The example selects Exact Text Search, suitable for handling specific keywords, such as fixed dates, fixed numbers, fixed names, etc. If your keywords are definite text, exact search usually makes results easier to control.
Then, in the left-side Keyword list to find, enter the content to be deleted line by line. The example fills in two lines: April and 2017. The right side is the Replacement keyword list, kept empty in this example. The interface notes "Leave blank to indicate deletion", meaning that if no replacement content is filled, the software will delete the keywords matched on the left.
This step requires special attention. Because batch processing will affect all imported files, if keywords are written too short or too broad, it might delete content that shouldn't be removed. For instance, writing just a single letter or common number might result in an overly wide match. It is recommended to use full words, complete numbers, or specific dates as keywords whenever possible.
Step 4: Set Output Location and Start Processing PDFs
After setting the keywords, click Next. The top progress flow shows that two subsequent stages follow: Set save location and Start processing. When setting the save location, it is recommended to choose a new output directory to store the PDFs after keyword deletion. This keeps the original files separate from the processed ones, facilitating comparison and backup.
Entering the start processing stage, the software will batch-process each PDF file in the list, replacing the content in the "Keyword list to find" with empty. After processing is complete, open the PDFs in the output directory to check the results. It is recommended to check at least the first file, the last file, and typical pages containing the target keywords to confirm the deletion effect matches expectations.
FAQ and Notes
1. What is the difference between this method and white masking in PDFs?
The method in this article is based on find and replace, substituting specified keywords with empty. Masking typically involves overlaying a shape or image on the page; the approaches differ. For searchable text, keyword replacement is more suitable for batch unified processing.
2. Does an empty replacement list always mean deletion?
According to the interface prompt in the screenshot, "Leave blank to indicate deletion". Therefore, in this function, if the goal is text deletion, the right-side replacement keyword list can be kept empty.
3. Can Chinese keywords be deleted?
The function name is Find and Replace Keywords in PDF, and the example uses English and numbers. For specific keywords like Chinese, English, or numbers, practical operation should always assume that the PDF text can be recognized and matched. It is recommended to test with one file first.
4. How to avoid accidental deletion?
First, write complete keywords and avoid overly short terms; Second, test with a small number of files first; Third, output to a new folder and do not overwrite the original PDFs; Fourth, spot-check results after processing. Batch processing is highly efficient, which makes it even more necessary to confirm the rules beforehand.
5. What if the words to be deleted have case differences?
The setting page shows an "Ignore letter case" option. If the same English word in your PDF appears with different cases, you can check this option according to your needs; if you only want to delete exactly matching spellings, maintain an exact match approach.
6. Is backup necessary before batch processing?
Backup is recommended. Although setting a save location allows results to be output to a new directory, keeping the original PDFs before officially processing important documents is always a safer practice.
Summary
Uniformly deleting text content across multiple PDFs does not necessarily require opening each file manually for editing. With HeSoft Doc Batch Tool , you can use the "Find and Replace Keywords in PDF" function to write the keywords to be removed into a list and leave the replacement content empty, thereby batch deleting specified text in PDFs.
The advantages of this workflow are clear operations, suitability for batch tasks, and easy result verification: first import PDFs, then set keywords, then choose a save location, and finally start processing. For office users who frequently handle PDF reports, contracts, information packages, and public notices, delegating repetitive text cleaning tasks to a batch processing tool can significantly reduce the time spent on manual searching and file-by-file modification. The next time you encounter a need for batch keyword removal from PDFs, it is recommended to first organize your files and keyword lists, then follow the steps in this article for testing and batch execution.