This article explains how to use HeSoft Doc Batch Tool to batch convert multiple PDF files into JPG images and stitch the multiple pages of each PDF into a single long image. Combining the before-and-after effects and software operation screenshots, the article walks through the complete process from entering the PDF tool, adding files, setting page ranges, setting image pixel density, to enabling the "Stitch multiple pages into a long image" option. It is suitable for office scenarios that require batch processing of reports, contracts, resumes, courseware, scanned documents, and archival materials.
In daily office work, many materials are saved in PDF format, but when forwarding, previewing, archiving, or uploading to certain platforms, long images are often more convenient than PDFs. For example, a multi-page report needs to be displayed in a web backend, a scanned contract requires a preview image, a batch of course materials needs to be sent to a group for quick review by others, or multiple PDFs need to be converted to JPG images and then uniformly named, compressed, and archived. If you open PDFs one by one, take screenshots page by page, and then manually stitch them into a long image, it is not only time-consuming but also prone to issues such as missing pages, incorrect order, and inconsistent resolution.
The problem this article aims to solve is clear: batch convert many PDFs into very long JPG images. The "very long image" here refers to stitching multiple pages from a PDF into one vertical long image in order, rather than exporting each page as a separate image. With the office software " HeSoft Doc Batch Tool ", you can import multiple PDF files at once, uniformly set the page range and image pixel density, and enable the option to stitch multiple pages into a long image, thus completing repetitive PDF-to-image conversion work in batch.
Applicable Scenarios: When is it suitable to batch convert PDFs to long images
Batch converting PDFs to long JPG images is suitable for many office scenarios aimed at "viewing, sharing, displaying, and archiving." Compared to regular PDFs, JPG images have lower barriers to opening and can generally be previewed directly on phones, computers, web backends, and chat tools; compared to page-by-page images, long images maintain content continuity, so readers don't need to frequently switch files.
1. Quick preview of multiple reports, proposals, and contracts. If there are dozens of PDF reports in a folder, opening them one by one to view wastes time. After converting each PDF to a long image, you can directly preview thumbnails in the file explorer, or send the images to colleagues for quick confirmation of layout and content.
2. Unified archiving of scans, supporting documents, and票据 materials. Many scanned PDFs are essentially image pages; after conversion to long images, they are more suitable for image databases, web displays, or mobile viewing. For content like identity proofs, application materials, and contract attachments, long images preserve the connection between preceding and following pages.
3. Sharing course materials, instruction manuals, and operation guides. Some users may not have the convenience of downloading a PDF reader, or just want to quickly browse content on their mobile phones. After stitching PDF pages into JPG long images, they can be easily shared via chat tools, knowledge bases, official account backends, or internal systems.
4. Batch processing large numbers of PDFs to reduce repetitive work. Manual conversion is acceptable for one or two PDFs; but when the number of files increases to dozens or even hundreds, the value of batch processing tools becomes very apparent. The positioning of HeSoft Doc Batch Tool is batch processing of office files, suitable for handing over originally repetitive, mechanical operations to the software for unified execution.
Preview of Results: Before processing, multiple PDFs; after processing, multiple long JPG images
Before processing, the folder contains multiple PDF files, for example, the screenshot shows 4 PDFs named 1.pdf, 2.pdf, 3.pdf, and 4.pdf. If these files are opened and converted one by one, the steps are not only repetitive, but the page counts of different files may vary, making omission easy during manual processing.
After batch conversion, each PDF generates a corresponding JPG image, with file names becoming 1.jpg, 2.jpg, 3.jpg, 4.jpg. As seen from the processed results, the generated images are in a vertical long layout, meaning the multiple pages from the PDF have been stitched in order into one long image. This preserves the page order of the PDF content while reducing the issue of having too many exported images.
This result is highly suitable for scenarios requiring "one PDF corresponds to one preview image." For instance, 4 PDFs result in 4 JPG long images after processing; the number of files does not greatly inflate with the number of PDF pages, making subsequent viewing, uploading, sending, and renaming simpler.
Steps: Using HeSoft Doc Batch Tool to Batch Convert PDFs to Long Images
Step 1: Enter PDF Tools and select "PDF to JPG Image"
After opening HeSoft Doc Batch Tool , select "PDF Tools" in the left function category. The interface will display multiple PDF-related batch processing functions, such as adding stamps to PDFs, deleting pages in PDFs, PDF to Word, PDF to PowerPoint, PDF to TXT, etc. This article aims to convert PDFs to images, so you need to find and click "PDF to JPG Image".
As seen in the screenshot, the description on the "PDF to JPG Image" function card is "Batch convert PDF files to JPG format images." This indicates the function itself supports batch processing, not just converting a single file. After selecting this function, you enter the wizard-style operation page for PDF to JPG.
The purpose of this step is to determine the conversion tool to use. The expected result is to enter the "PDF to JPG Image" task interface and prepare to add the PDF files needing processing.
Step 2: Add multiple PDF files and confirm the records to be processed
After entering the function page, the top of the interface shows the current task is "PDF to JPG Image." In the first step "Select records to process," you can import single or multiple PDFs via "Add Files," or add all PDFs from a specific folder into the task list at once using "Import Files from Folder." If you add the wrong files, the interface also provides a "Clear" button to remove the current list and reselect.
The task list in the screenshot has already added 4 PDF files, namely 1.pdf, 2.pdf, 3.pdf, 4.pdf. The table shows details like serial number, name, path, extension, creation time, modification time, etc., making it easy to verify the files are correct before batch conversion. The operation column on the right also shows a delete icon for removing any unneeded record.
For this step, it is recommended to focus on checking three items: first, whether the file count is correct, for example, the summary record count in the screenshot is 4; second, whether the file paths lead to the target folder, for example, the sample path is in a test directory on the D drive; third, whether the extensions are all pdf, to avoid accidentally adding irrelevant files.
After confirming the list is correct, click "Next" at the bottom to enter the processing option settings. At this point, the software knows which PDFs to process. Next, you need to decide which pages to convert, the image clarity, and whether to stitch them into a long image.
Step 3: Set the processing range and select the PDF pages to convert
After entering the second step "Set processing options," the first thing you see is the "Processing Range." The software provides various range options, including "All pages," "First few pages," "Last few pages," "Odd pages," "Even pages," "Custom," etc. Different ranges suit different office needs.
If you want to convert the entire content of each PDF into a long image, you should typically select "All pages." If you only need to export covers, tables of contents, or the first few pages, you can choose "First few pages" and enter the number in the range input box. The example in the screenshot selects "First few pages" with a range value of 5, meaning only the first 5 pages of each PDF are processed. This setting is very practical for scenarios needing only the first few pages for abstracts or cover previews.
"Last few pages" is suitable for exporting content located at the end of a PDF, such as attachment pages, signature pages, conclusion pages; "Odd pages" and "Even pages" are suitable for certain double-sided scans or specially formatted materials; "Custom" is typically used for specifying more flexible page ranges. Which one to choose depends on the actual business need. The focus of this article is generating long images; if you want the long image to contain the full PDF content, select all pages; if you only want part of the pages, set the corresponding range as shown in the screenshot.
Step 4: Set image pixel density (PPI) to balance clarity and file size
In the processing options, you can also set the "Image Pixel Density (PPI)." In the screenshot, this value is 300. The higher the PPI, the clearer the exported JPG image usually is, but the image file may also be larger; with lower PPI, the file is smaller, but fine text, table lines, seals, etc., might not be clear enough.
For common office documents, contracts, reports, and scans, 300 PPI is a commonly used setting that balances clarity and volume. If it's only for quick preview on mobile, you can appropriately lower it based on the actual situation; if you need to preserve print-level details clearly, then maintain a higher PPI setting. The interface in the screenshot also provides a "Help" entry, which can help you understand this parameter when unsure.
The purpose of this step is to uniformly control the image quality of the batch PDF-to-JPG conversion. The expected result is that all exported long images use the same pixel density, avoiding some images being clear while others are blurry.
Step 5: Enable "Stitch multiple pages into one long image"
To achieve the core goal of this article, the most critical setting is to enable "Stitch multiple pages into one long image." The red box in the screenshot marks the position of this switch. When enabled, the software will stitch multiple pages from a single PDF that are involved in the processing into one JPG image in order, ultimately forming a vertical long image.
If this option is not enabled, PDF-to-JPG typically produces results closer to "page-by-page export," meaning one PDF might generate multiple images; after enabling it, it is more suitable for the need of "one PDF generates one long image." For users who need to batch convert many PDFs into long images, this switch is a setting that must be confirmed during the entire process.
For example, before processing, there are four files: 1.pdf, 2.pdf, 3.pdf, 4.pdf, and each PDF may contain multiple pages. After enabling long image stitching, the processed result will be 1.jpg, 2.jpg, 3.jpg, 4.jpg, with each JPG corresponding to an original PDF and displaying the corresponding page content in long image form.
Step 6: Proceed to save location and start processing
After completing the page range, PPI, and long image stitching settings, click "Next" at the bottom. As seen from the interface wizard, the subsequent steps include "Set Save Location" and "Start Processing." The save location determines where the converted JPG long images will be output; start processing allows the software to formally execute the batch conversion task.
Since batch conversion will generate new JPG files, it is recommended to choose a clear output folder when setting the save location, such as "PDF to Long Image Results," "JPG Long Image Output," or an archive directory corresponding to the current project. This prevents new files from mixing with the original PDFs and makes subsequent checking and sending more convenient.
After entering the start processing phase, the software will execute the conversion sequentially based on the previously added PDF list and unified settings. Once processing is complete, open the output directory to view the generated JPG long image files. Combined with the effect pictures, you can see that the processed file names correspond to the original PDFs, extensions change from .pdf to .jpg, and the content appears in a vertical long image format.
Frequently Asked Questions and Notes
1. Why does each PDF generate only one JPG after processing?
This is because "Stitch multiple pages into one long image" is enabled. After enabling this option, pages within the same PDF that meet the processing range are stitched into one long image. Therefore, after batch processing multiple PDFs, you typically get multiple JPG long images, with each JPG corresponding to one PDF.
2. If I want to convert all pages, how should I set it?
Select "All pages" in the "Processing Range." The screenshot example selects "First few pages" and enters 5, meaning only the first 5 pages of each PDF are processed. If your goal is a complete PDF-to-long-image conversion, don't forget to change the range to all pages.
3. What is a suitable PPI setting?
The screenshot uses 300 PPI, which is a relatively common clarity setting for office documents, scans, and report materials. Generally, higher PPI results in clearer images but also potentially larger file sizes. If it's only for quick preview, you can adjust it according to needs; if you want to preserve text details, it's recommended not to set it too low.
4. What should I pay attention to when batch importing files?
After importing, first review the list to confirm file names, paths, extensions, and record count. HeSoft Doc Batch Tool lists this information in a table for easy pre-processing checks. If you added a PDF that doesn't need conversion, you can use the delete button in the operation column to remove it; if the entire list is wrong, you can use "Clear" to re-add files.
5. Will the long image be too long?
If a PDF has many pages, the stitched image can indeed be very long, and the file size will also increase. It is recommended to choose the processing range based on the usage scenario: for complete archiving, select all pages; for preview, only process the first few pages; for extracting signature pages, process the last pages. This way, you get the long image effect while controlling image length and size.
Summary: Using batch processing to convert PDFs to long images is more suitable for high-frequency office tasks
Batch converting many PDFs into very long JPG images essentially solves the problem of repetitive labor. Manual operation requires opening PDFs one by one, exporting or taking screenshots page by page, and then stitching them into a long image; using HeSoft Doc Batch Tool , you only need to select "PDF to JPG Image," batch add PDFs, set the page range and PPI, and enable "Stitch multiple pages into one long image" to let the software complete the conversion according to unified rules.
This method not only saves time but also reduces human problems like missed pages, order errors, and inconsistent resolution. For users who frequently handle PDF reports, contracts, scans, courseware, and archival materials, it is recommended to standardize this type of batch PDF-to-long-image process: first organize the source PDF folder, then batch import, and finally output uniformly to a results directory. The next time you encounter a similar task, you won't need to repeat manual conversion and can directly use the office software to complete the batch processing.