When PDF file names are meaningless serial numbers, archiving and retrieval become difficult. This article introduces a method for batch renaming based on PDF content: use the PDF content renaming function in HeSoft Doc Batch Tool , import multiple PDFs and select a custom formula to match text, enter \d{8} in the regular expression, and the 8-digit code in the body can be extracted to overwrite the original file name. The article combines before-and-after processing and operation screenshots, suitable for office workers who need to organize PDF materials such as contracts, agreements, orders, and reports.
Many companies encounter the same problem when organizing electronic contracts, agreements, order receipts, test reports, or project documents: the PDF files themselves contain complete identification numbers, but the file names are just simple numbers or export sequence numbers. For example, a folder might display 1.pdf, 2.pdf, 3.pdf, 4.pdf, requiring each file to be opened individually to know which contract number each file corresponds to. Such files can be managed barely in the short term, but once the quantity increases, searching, verification, archiving, and handover all become very inefficient.
The method introduced in this article is to let office software automatically read the identification number within the PDF body and use wildcard/regular expression rules to extract the target text, batch-replacing the original file names. In the screenshot example, each PDF's first page contains an 8-digit contract number, and the final file name will be changed from the original sequence number to the number itself, such as 10026877.pdf. The entire process is suitable for non-developers; you only need to understand the number format and fill in the corresponding matching expression in the software.
Applicable Scenarios: Needing to Extract Numbers from PDF Content as File Names
Renaming based on PDF body content is most suitable for processing materials where "file content is regular, but file names are irregular." For instance, a contract PDF body might contain "Contract No." or a contract number, an order PDF might have an order number, a test report might have a report number, archival materials might have a personnel number, and financial documents might have a receipt number. As long as the identification number format is relatively stable, such as consecutive 8-digit numbers, a fixed letter prefix plus numbers, or a date plus a serial number, you can consider using rule matching.
The value of this method lies in reducing repetitive labor. The traditional approach is to open the first PDF, find the number, copy it, close the file, and rename it; then open the second PDF and repeat the same actions. If there are 100 files, you repeat this 100 times. The idea behind batch processing tools is: first set up the rules, and then let the software execute the same set of rules for all files.
The examples in this article use PDF files. If your office documents are Word files, such as .docx or .doc, or text files, you can also choose the processing target based on the corresponding document content renaming function in the software. The entry points for different formats may vary, but the concept of "extracting key text based on content and generating file names" is the same.
Effect Preview: From Meaningless Serial Numbers to Searchable Identifiers
Before Processing: File Names Do Not Reflect PDF Content
In the screenshot before processing, there are 4 PDF files in the folder, named 1.pdf, 2.pdf, 3.pdf, and 4.pdf. While this naming method is simple, it cannot carry business information. Whether a contract administrator, project assistant, or finance staff member, they all must open the file to determine its content.
After opening one of the PDFs, you can see the "Contract No." field at the top of the page, followed by an 8-digit numerical identifier. The red box and arrow indicate the number 10026877. This number is the most valuable information for file archiving, as it can directly correspond to a record in a contract ledger or business system.
After Processing: File Names Become the Contract Number from the PDF
After completing the batch renaming, the PDF names in the folder change to 10026877.pdf, 20036655.pdf, 20100511.pdf, and 33952100.pdf respectively. Now, without opening the files, you can directly identify the corresponding number based on the file name.
This result is very suitable for subsequent archiving. Whether sorting by number, searching in folders, uploading to a system, or verifying against an Excel ledger, it is more reliable than the original 1.pdf, 2.pdf.
Operating Steps: Using HeSoft Doc Batch Tool to Complete Batch PDF Renaming
Step 1: Find the PDF Content Renaming Feature Under File Name Tools
Open HeSoft Doc Batch Tool . The software has multiple categories on the left, including Home, Task Flow, All Tools, File Name, Folder Name, File Organization, Word Tools, Excel Tools, PowerPoint Tools, PDF Tools, etc. Since this task involves modifying file names, select "File Name" on the left.
After entering the File Name category, find "7. Rename PDF files using file content" among the feature cards. The card description shows that this feature can "batch use certain text from the PDF file content as the file name." This means it does not simply replace the existing file name but reads the internal text of the PDF and uses the matched content for renaming.
The expected result of this step is to enter a wizard interface specifically for processing PDF content renaming. For large volumes of PDF contracts, orders, or reports, this is the most critical function entry point.
Step 2: Import the PDF Files to Be Renamed
Upon entering the function, the page title displays "Rename PDF files using file content." The progress bar shows 4 steps: Select records to process, Set processing options, Set save location, and Start processing. Currently, we are at step 1.
The upper-right part of the page provides "Add Files" and "Import Files from Folder." If the target files are scattered in different locations, you can use Add Files; if all PDFs are in one directory, using Import Files from Folder is more convenient. The screenshot shows 4 PDFs have been imported, with the list displaying their names, paths, extensions, creation times, and modification times.
After importing, please check three key points: first, whether all extensions are .pdf; second, whether the record count is correct; third, whether the path is the directory intended for processing. The bottom of the screenshot shows a record count of 4, indicating that the renaming will be performed on these 4 PDFs. After confirming everything is correct, click "Next Step" at the bottom.
Step 3: Set the Search Area to "Text Matched by Custom Formula"
After entering step 2, "Set Processing Options," you need to tell the software where to get the file name from in the PDF. The "Search Area" option in the interface provides multiple choices, including "First line of text," "First barcode image," and "Text matched by custom formula." This example needs to extract the 8-digit contract number from the PDF body, so choose "Text matched by custom formula."
The purpose of selecting this is to not be limited to just the first line and not to rely on barcodes, but to use rules to search for content matching specific criteria within the PDF text. For fixed-format text like contract numbers, this is a more flexible method.
Step 4: Enter the Expression for Matching 8-Digit Numbers
Enter \d{8} in the "Regular Expression" input box. This expression is used to match a consecutive sequence of 8 digits. The contract number 10026877 in the screenshot is exactly 8 digits, so it will be matched and used to generate the file name.
If you interpret it as a wildcard rule, you can remember it this way: \d represents a digit, and {8} represents a quantity of 8. Compared to ordinary asterisk or question mark wildcards, regular expressions can describe the number format more accurately. For batch renaming, the more precise the rule, the more stable the results.
Before filling in the expression, it is recommended to observe a few sample PDFs to confirm that all target number lengths are consistent. If some contract numbers are 8 digits and others are 10 digits, you cannot simply use the same \d{8} rule; you need to adjust it according to the actual format.
Step 5: Choose to Overwrite the Entire File Name
In the "Position" setting, the screenshot shows the options "Overwrite the entire file name," "On the left of the file name," and "On the right of the file name." The current goal is to completely replace old names like 1.pdf or 2.pdf with the contract number, so choose "Overwrite the entire file name."
After selection, the software will use the matched number as the main body of the new file name and retain the PDF extension. That is, when it matches 10026877, the output file name will be 10026877.pdf. This naming is the most concise and makes searching by number the easiest.
If your actual need is to retain the original file name, you can also add the number to the left or right. For example, you could add the contract number before the original file name, forming a structure like "10026877_1.pdf." But since this example is a complete overwrite, choosing to overwrite the entire file name is more appropriate.
Step 6: Proceed to Save Location and Start Processing
After setting the matching rules and naming position, click "Next Step." According to the progress bar, you will next need to set the save location and then start processing. Although the screenshot does not show the specific page for the save location, it can be reasonably inferred from the wizard flow that users will need to confirm how the processed files are saved in subsequent steps.
For important PDFs, it is recommended to first save the processing results to a separate directory. After confirming the file names are correct, perform the formal replacement or archiving. This way, even if the expression settings do not meet expectations, the original files will not be affected. After confirmation, proceed to "Start Processing" and wait for the software to complete the batch task.
Common Questions and Precautions
Is the expression \d{8} suitable for all PDFs?
Not necessarily. It is only suitable for cases where the target number is a consecutive 8-digit sequence. If your contract number includes letters, hyphens, or dates, such as HT-20260601-001, you need to use an expression matching that format. Before batch processing, you should first clarify the numbering rules.
If a PDF has multiple 8-digit numbers, could the wrong one be extracted?
It's possible. If the body text also contains dates, phone numbers, transaction amounts, or other 8-digit numbers, the software might match non-target content. Therefore, before formal processing, it is recommended to test with a small sample first. If necessary, make the rules more specific, for example, by combining fixed text before or after the number to limit the target scope.
What if file names are duplicated?
If the same number is matched in different PDFs, a duplicate file name problem could occur. In theory, numbers for contracts, orders, etc., should be unique, but duplicate scanning or exporting may occur in practice. Check the samples before processing, and also verify that the file count remains consistent after processing.
Why can't some PDFs be identified by number?
Possible reasons include the PDF being a purely scanned image, the number not belonging to extractable text, the number format not matching the expression, or the number being in a special location within the PDF. In such cases, first open the PDF and try to select the number text. If it cannot be selected, it indicates it may not be a standard text layer.
Can this be used for Word, .docx, or .doc files?
This article discusses PDF files. For Word documents like .docx or .doc, you need to choose the content renaming function in the software appropriate for Word files. Do not use the PDF function directly for Word files; before importing, confirm that the extension and function type match.
Summary: Making PDF File Names Automatically Match Business Identifiers
Through HeSoft Doc Batch Tool , you can transform the repetitive task of "opening a PDF, checking the number, and manually renaming" into an automated process of "importing files, setting expressions, and executing in batch." For PDF documents like contracts, orders, reports, and archives, batch renaming based on the body identification number can significantly improve file organization efficiency and reduce the risk of manual copying errors.
If your PDF file names are still meaningless serial numbers, it is recommended to start by testing with a few samples. After confirming the number format, select custom formula match text in "Rename PDF files using file content," enter the appropriate regular expression, and then process the entire folder in batches. This ensures controllable results and allows you to quickly standardize the naming of a large number of PDFs.