When the text format in multiple PDFs is similar but the content varies, manual find-and-replace can be time-consuming. This article focuses on batch PDF keyword replacement scenarios, demonstrating how to import multiple PDFs in HeSoft Doc Batch Tool , use formulas for fuzzy text search, and match months and four-digit years through wildcard-like rules, ultimately replacing old dates with new dates uniformly in the PDFs, making it suitable for batch revision of reports, announcements, contracts, and archived documents.
When encountering a PDF modification need, many people's first reaction is to open a file, search for a word, replace it once, then save, and continue to the next file. It's not a big problem when there are only one or two files, but if it's dozens of reports, hundreds of notices, or a batch of contract attachments, repeatedly opening PDFs, locating keywords, and manually changing dates can be very inefficient. What's more troublesome is that the keywords in the PDFs may not be exactly the same: some months might be April, others May; some years might be 2017, others 2020 or 2024. Relying only on exact search at this point makes it easy to miss different variations.
This article uses batch replacement of dates in PDFs as an example to explain how to use HeSoft Doc Batch Tool to complete batch keyword replacement across multiple PDFs. It is a document batch processing software designed for office scenarios, focusing on batch file processing, reducing repetitive work, and improving work efficiency. Through the Find and Replace Keywords in PDF feature in the software, we can use wildcards or formulas for fuzzy text search, matching months and years in multiple PDFs at once, and uniformly replacing them with the target content.
Applicable Scenarios: Especially Useful for Batch Modifying PDF Text
Batch keyword replacement in PDFs is not only suitable for dates. As long as you have batch revision needs in your PDFs, you can consider using this method. For example, after a company name change, the old name in historical documents needs to be changed to the new one; after project number adjustments, numbers in reports need batch replacement; after training material revisions, version numbers, release dates, or instructor names need a unified update; when reusing administrative announcement templates, the previous month, year, or department name needs to be changed to new content.
The advantage of fuzzy search using wildcards or formulas is that it can handle text with regular variations. For example, a year is typically a 4-digit number, a number might consist of letters and numbers, and a month might be chosen from multiple English words. Compared to listing all possible values one by one, fuzzy search can cover more text with fewer rules. For those who frequently handle PDFs, Word, docx, doc, Excel spreadsheets, or other office files, mastering the batch processing mindset can significantly reduce the cost of repetitive operations.
Preview of Results: From Multiple PDF Files to Unified Replacement Results
The processing objects for this demonstration are a group of PDF files. The screenshot shows that there are 4 PDFs in the folder: 1.pdf, 2.pdf, 3.pdf, and 4.pdf. In actual office work, these files might be different versions of the same type of report, or PDFs in the same format submitted by multiple departments. The first step using a batch processing tool is to import these target files into the same task.
Opening the PDF before processing shows the date displayed as April 13, 2017. The red box highlights two parts that need attention: April and 2017. The reason for not directly using the full date as the sole search object here is that dates may not be exactly the same across different files. If only April 13, 2017 is searched for, content like May 13, 2018 will not be matched. Therefore, this example treats the month and year separately: the month uses optional matching, and the year uses a four-digit number rule for matching.
After processing, opening the PDF again shows the date has changed to August 13, 2026. The 13 in the middle has not changed, indicating that these rules only affected the month and year, without replacing the day digits. This result demonstrates the value of batch fuzzy search and replace: it can batch-modify variable fields while preserving content that does not need to be changed.
Operating Steps: Following the Wizard for PDF Batch Fuzzy Find and Replace
Step 1: Open the Find and Replace Feature in the PDF Tool
After launching HeSoft Doc Batch Tool , first navigate to the PDF Tool in the left sidebar. On the right, multiple PDF batch processing feature cards will be displayed, including PDF Add Password Protection, PDF Add Watermark, PDF Delete Pages, PDF to Word, PDF to TXT, etc. To batch replace keywords in PDF content, you need to select the first feature card: Find and Replace Keywords in PDF.
The purpose of this entry is to establish a batch replacement task. Unlike general PDF editors, it does not operate around a single file but first allows users to select a batch of files, then uniformly configure find and replace rules, and finally output results in batch. For multi-file scenarios, this workflow is more suitable for management and makes it easier to check if each step is correct.
Step 2: Import PDF Files to Process and Confirm the List
After entering the find and replace page, the software provides two main entry points at the top: Add Files and Import Files from Folder. If you have already placed your PDFs in the same folder, it is recommended to use Import Files from Folder, which allows you to add the entire batch at once; if files are scattered in different locations, you can use Add Files to select them individually.
After importing, the files will appear in the record list. The screenshot shows a list containing 4 records, all with the pdf extension, displaying file name, path, creation time, modification time, and other information. It is advisable to carefully confirm the file scope here, as the efficiency of batch processing comes from processing multiple files at once, but only if the imported list is accurate. If errors are made during file import, you can use the inline delete operation to remove individual files, or use clear to reselect. After confirming the record count and file names are correct, click Next at the bottom of the page.
Step 3: Enable Use Formula for Fuzzy Text Search
After entering the processing options setup, the interface will display search modes. There are two choices: Exact Text Search and Use Formula for Fuzzy Text Search. If you are replacing a completely fixed word, such as changing the old company name A to the new company name B, you can choose Exact Text Search. However, this example needs to match April or May, and any 4-digit year, so you need to check Use Formula for Fuzzy Text Search.
At the bottom of this page, the left area is the list of keywords to find, and the right area is the list of replacement keywords. The two sides correspond by row, and the order must be kept consistent. The settings in the screenshot can be understood as follows: the first row on the left, April|May, means matching April or May, corresponding to the first row on the right, August, which means replacing the matched month with August; the second row on the left, \d{4}, means matching 4-digit numbers, corresponding to the second row on the right, 2026, which means replacing the matched 4-digit numbers with 2026.
Extending this concept to other office scenarios is also easy to understand. For example, to replace multiple old version numbers with one new version number, you can write the matching rules for the old versions on the left and the new version on the right; to unify different years to the current year, you can use a similar 4-digit number matching method. But the more general the rule, the more necessary it is to test in advance to avoid replacing numbers that should not be replaced.
Step 4: Set the Save Location to Avoid Overwriting Original PDFs
After completing the keyword option settings, click Next to proceed to setting the save location. At the top of the wizard, you can see that the entire process is divided into four stages: Select Records to Process, Set Processing Options, Set Save Location, and Start Processing. The save location step is very important because it determines where the processed PDFs will be output.
It is recommended to set the output location to a new folder, such as creating a "Processed" or "Replace Results" directory. Doing so has three benefits: first, it retains the original PDF for easy backtracking; second, it allows for quick comparison of differences before and after processing; third, if there is an error in the rule settings, you can delete the output results and reprocess without affecting the originals. For official business documents, especially contracts, audit reports, announcements, bidding materials, etc., keeping the originals is a necessary safety habit.
Step 5: Start Processing and Check the Output Results
After setting the save location, proceed to the start processing stage. The software will execute the find and replace on each PDF in the imported list. Once processing is complete, go to the output directory and open the PDFs to check the results. Based on this example, the target result should be the month changed to August, the year changed to 2026, while the date 13 remains unchanged.
It is recommended not to check only one file. If this task involves a large number of PDFs, you can spot-check a few files at the beginning, middle, and end; if the file contents vary significantly, increase the spot-check count. For very important materials, you can also test the rules on 1 to 2 sample PDFs before processing, and only import all files for batch processing after confirming they are correct.
Common Questions and Precautions: Making PDF Batch Replacement More Accurate
1. What does April|May mean?
In this example, April|May means matching April or May. It is suitable for matching scenarios with multiple optional words. For instance, when different months, department abbreviations, or old names might appear in documents, you can use similar rules to converge multiple possible values into a single replacement result. However, please note that the specific rules should be based on the help instructions on the software page, and it's advisable to verify using a small number of PDFs before formal use.
2. Why can \d{4} match years?
\d{4} represents matching consecutive 4-digit numbers, hence it is often used to match years. In the screenshot, it replaces 4-digit numbers like 2017 with 2026. But it does not only recognize years; any consecutive 4-digit numbers present in the PDF could be matched. Therefore, if the file also contains report numbers, phone number suffixes, amount codes, and other 4-digit numbers, caution is needed. If necessary, more precise matching conditions should be designed, or sample testing should be done first.
3. Why did the replacement only change the month and year, leaving the date 13 unchanged?
Because the find list in this example contained only two rules: a month rule and a 4-digit number rule. The 13 in the date is a 2-digit number, which does not match \d{4} nor belong to April|May, so it is not replaced. This shows that when setting up fuzzy search, the range of the rules directly affects the replacement results. Only by writing accurate rules can you ensure that only the intended content is changed.
4. Can all text in a PDF be replaced?
Not all PDFs are suitable for direct text replacement. If a PDF is generated from image scans, the text on the page might not be actual text but part of an image, in which case regular keyword searches might fail to match. Before processing, you can try selecting text in a PDF reader; if it cannot be selected, you should be aware it might be a scanned PDF. For such files, they usually need to be recognized or converted before considering text replacement.
5. What preparations are needed before batch replacement?
It is recommended to complete three preparations first: first, gather the PDFs to be processed into the same folder to avoid missing any; second, back up the original files, or at least set the output directory to a new location; third, clearly define the search rules and replacement results, ideally verifying them in a sample file first. Batch processing pursues efficiency, but accuracy is equally important, especially when rules involve wildcards or formulas, making it even more critical to avoid an overly broad matching scope.
Summary: Using the Wildcard Approach to Enhance PDF Batch Processing Efficiency
The difficulty in batch-replacing multiple PDF keywords lies not in replacing a single fixed word, but in how to handle text that is similar in format but different in content. Using the Find and Replace Keywords in PDF feature of HeSoft Doc Batch Tool , you can import multiple PDFs into the same task and use the formula-based fuzzy text search to achieve wildcard-like matching. In this article's example, April or May were uniformly replaced with August, and any 4-digit year was replaced with 2026, ultimately achieving a batch update of the date field.
If you frequently need to batch-modify keywords in PDF reports, contracts, notices, or archived materials, it is recommended to prioritize this wizard-based batch processing workflow: select the feature, import files, set fuzzy search rules, specify the save location, start processing, and spot-check the results. Compared to opening PDFs one by one for manual editing, this method is more time-saving, more standardized, and better suited for high-frequency office document processing needs within a team.