This article explains how to batch convert multiple PDFs into long JPG images, suitable for scenarios where multi-page PDFs like contracts, reports, courseware, and manuals need to be previewed, shared, or archived in image form. Through the "PDF to JPG Image" feature in HeSoft Doc Batch Tool , you can import multiple PDFs at once, set the processing page range and image pixel density, and enable "Stitch multiple pages into a long image," ultimately outputting each PDF as a corresponding long image file, reducing the repetitive operations of opening, screenshotting, and stitching one by one.
In daily office work, many materials are in PDF format, such as product manuals, training courseware, scanned contracts, project reports, quotations, and policy documents. PDFs are suitable for typesetting and printing, but if you need to send them to chat tools, web backends, knowledge bases, mobile pages, or asset management systems, uploading PDFs directly is sometimes inconvenient. This is especially true for multi-page PDFs, where the recipient still needs to download, open, and flip through pages. Taking screenshots page by page and then manually stitching them into a long image also wastes a lot of time.
The problem this article aims to solve is: how to batch convert many PDFs into very long images. The "very long image" here can be understood as sequentially stitching multiple pages from a PDF into a single JPG long image. This way, each PDF generates a corresponding JPG file, and when viewing, you just need to scroll down the image, eliminating the need to flip through the PDF page by page. Below, combined with screenshots, we introduce how to use the office software " HeSoft Doc Batch Tool " to complete the batch PDF to JPG long image operation.
Applicable Scenarios: When is it suitable to batch convert PDFs to long images
Batch PDF to long image conversion is not a simple format change; it is more suitable for office scenarios requiring "quick preview, continuous reading, and batch distribution." For example, the administrative department needs to organize multiple policy PDFs into images for easy posting in WeCom or DingTalk groups; marketing staff need to convert promotional and product introduction PDFs into long images for web display or material review; training personnel need to convert courseware PDFs into long images for students to browse continuously on their phones; archival staff need to convert scanned PDFs into JPG images for easier filing by image file.
If the number of files is small, you can manually open the PDF and export images. However, when files reach dozens or hundreds, repeatedly opening, selecting pages, setting clarity, and saving to folders becomes very time-consuming. The value of HeSoft Doc Batch Tool lies in batch file processing: adding multiple PDFs at once, uniformly setting conversion parameters, and then outputting the results uniformly, reducing repetitive labor and improving processing efficiency.
Effect Preview: Before processing, multiple PDF files; after processing, corresponding JPG long images
From the pre-processing screenshot, you can see that there are multiple PDF files in the folder, with names similar to 1.pdf, 2.pdf, 3.pdf, 4.pdf. These are all PDF documents awaiting conversion. If processed individually, the same operation would need to be repeated multiple times.
After processing, the output results become JPG image files, with filenames corresponding to 1.jpg, 2.jpg, 3.jpg, 4.jpg. From the thumbnails, each image appears vertically very long, indicating that the multiple pages in the PDFs have been stitched into a single long image. This allows for continuous downward browsing when opened in an image viewer, webpage, or mobile device.
Step One: Select PDF to JPG Image in PDF Tools
After opening HeSoft Doc Batch Tool , you can see multiple office file processing categories on the left, including Word tools, Excel tools, PowerPoint tools, PDF tools, Image tools, etc. Since this task is to convert PDFs to images, you need to enter "PDF Tools" on the left.
In the PDF tools list, find the "PDF to JPG Image" function. In the screenshot, this function is located in the PDF tools area, with the description text "Batch convert PDF files to JPG format images." The purpose of this step is to enter the batch processing flow specifically for PDF-to-image conversion, rather than selecting other conversion functions like PDF to Word, PDF to Excel, or PDF to PowerPoint.
After selecting this function, the software enters the "PDF to JPG Image" task page. All subsequent settings will revolve around this function, including adding files, setting page ranges, setting image pixel density, and enabling the long image stitching option.
Step Two: Add the Multiple PDF Files to Convert
After entering the function page, the first step is to "Select records to process." On the upper right of the page, you can see buttons like "Add File," "Import Files from Folder," "Clear," "More," etc. For PDFs that are few in number and scattered in different locations, you can click "Add File"; if the PDFs are concentrated in one folder, you can use "Import Files from Folder," which is more suitable for batch import.
In the screenshot, 4 PDF files have been imported, and the list displays columns for sequence number, name, path, extension, creation time, modification time, and actions. Here you can confirm whether the files are added correctly, for example, if the names are 1.pdf, 2.pdf, 3.pdf, 4.pdf, if the paths are from the target folder, and if the extension is pdf. If files are added mistakenly, you can remove them using the delete button in the action column; if the list needs reorganization, you can use "Clear" and then re-add.
After confirming the file list is correct, click "Next" at the bottom of the page. The expected outcome of this step is to enter the processing options setting page, where you specify the page range, image clarity, and whether to stitch into a long image for the subsequent batch conversion.
Step Three: Set Processing Range and Image Pixel Density
After arriving at the "Set Processing Options" page, first pay attention to the "Processing Range." The interface provides multiple range options, including "All pages," "First few pages," "Last few pages," "Odd pages," "Even pages," and "Custom." These options determine which pages in the PDF will participate in the conversion.
If you want to convert and stitch all pages of the PDF into a long image, you should generally select "All pages." If you only want to convert the first few pages for preview, you can select "First few pages" and fill in the number of pages in the range input box. The range value currently shown in the screenshot is 5, indicating processing the specified number of pages based on the current selected range. For complete materials like contracts, reports, and manuals, it is recommended to choose the page range according to actual needs to avoid the output image being too long or the file too large.
Below is the "Image Pixel Density (PPI)" setting, which is 300 in the screenshot. PPI affects the clarity and file size of the output image. Higher values generally mean clearer images but potentially larger files; lower values may result in smaller file sizes but less clear text details. For PDFs where text needs to be read, 300 PPI is a common office output setting; if it's just for a quick preview, you can adjust it accordingly based on the situation.
Step Four: Enable "Stitch multiple pages into a very long image"
The core setting of this tutorial is the switch at the bottom of the page: "Stitch multiple pages into a very long image." The red box and arrow in the screenshot point out this option. Only by enabling this option will multiple pages be synthesized into a vertical long image; if not enabled, the conversion result might lean more towards outputting images page by page.
Therefore, if your goal is to "convert many PDFs into very long images," you must check whether this switch is turned on. Once enabled, each PDF will sequentially stitch multiple pages based on the set processing range, ultimately forming the corresponding long JPG image. This achieves the batch result of outputting 1.jpg from 1.pdf, 2.jpg from 2.pdf, and so on.
After completing the settings, continue by clicking "Next." Based on the page flow, the subsequent steps will lead to "Set Save Location" and "Start Processing." It is recommended to choose an easy-to-identify output folder, such as "PDF to Long Image Results" or a project-specific folder, to avoid mixing with the original PDFs. Finally, enter the start processing step and wait for the software to execute the batch conversion.
Common Questions and Precautions
1. Why use a JPG long image instead of sending the PDF directly? JPG images offer a more direct preview on many platforms, especially for mobile reading, web display, and chatting, where users don't need to open a separate PDF reader. For materials requiring continuous browsing, a long image is more intuitive.
2. Will the long image be too large? If the PDF has many pages and the PPI setting is high, the generated long image file might be relatively large. You can control the size by reducing the number of processed pages, adjusting the PPI, or processing in batches. For text-based reading materials, a balance between clarity and file size is needed.
3. Are all PDFs suitable for stitching into a long image? Most multi-page PDFs can be used for long image output, but if the original PDF has a very high page count, the generated image will be extremely long. When using for web pages or chat tools, you need to confirm whether the platform supports uploading and previewing very long images.
4. Should I organize file names before batch importing? It is recommended to organize the PDF file names in advance. The output images usually maintain a corresponding relationship with the source file names, for example, 1.pdf corresponds to 1.jpg, making verification and filing easier.
5. Is the text in the scanned PDF editable after conversion? The goal of this function is to convert PDFs to JPG images with the option to stitch them into a long image. The output result is an image, not editable text. If you need to edit text, you should choose other functions related to OCR or document conversion.
Summary: Use Batch Processing Tools to Reduce Repetitive Operations in PDF to Long Image Conversion
The key to batch converting multiple PDFs into very long JPG images lies in selecting the correct PDF to JPG function and enabling "Stitch multiple pages into a very long image" in the processing options. With HeSoft Doc Batch Tool , you can import multiple PDFs at once, uniformly set the page range and image pixel density, and then output them as corresponding long image files.
Compared to the method of opening PDFs one by one, taking screenshots page by page, and manually stitching them, batch processing can significantly reduce repetitive labor, especially suitable for office tasks with a large number of files and consistent processing rules. It is recommended that you prepare the folder of PDFs to be converted first, then follow the steps in this article to complete the import, settings, and start processing, so you can quickly obtain clear, continuous, easy-to-share PDF long image results.