When a folder contains web files such as .htm, .mhtml, and .html at the same time, subsequent organization and uploading can easily lead to format inconsistencies. This article uses HeSoft Doc Batch Tool as an example to explain how to batch import web files, verify extensions, set the save location, and generate unified .html files using the "HTML to HTML" conversion feature, helping office users reduce the time spent on repetitive "Save As" operations and manual file name modifications.
When organizing webpage materials, many users encounter a seemingly simple but very time-consuming problem: there is a batch of webpage files in a folder with the same or similar icons but inconsistent extensions. Some are called 1.mhtml, some 2.htm, and others are already 4.html. They all seem accessible when opened individually, but when these files need to be archived uniformly, uploaded to a system, or delivered as project materials, inconsistent extensions cause management headaches.
Manual processing usually requires opening files one by one and re-saving them as HTML through a browser or editing tool; or attempting to rename extensions individually. The former is time-consuming, while the latter is not reliable enough. Especially with a large number of files, it's easy to miss processing, make overwrite errors, or cause filename chaos.
This article introduces a method more suitable for office scenarios: using HeSoft Doc Batch Tool , and the software's HTML to HTML function, to batch convert webpage files with different extensions and output them uniformly in .html format. This software is a document batch processing office tool, with its core value lying in batch file processing, reducing repetitive work, and improving daily office efficiency.
Application Scenarios: Why Unify htm, mhtml into html
In practice, unifying webpage file formats is not just about "looking tidy" but about making subsequent processing more controllable.
For data archiving: Project materials, product manuals, webpage snapshots, exported help documents, etc., are often saved as webpage files. If the extensions are not uniform, it is easy to miss them when filtering and backing up according to rules later.
For system uploading: Some platforms or internal systems only recognize .html files. When .htm or .mhtml files exist in a folder, the format needs to be unified before uploading; otherwise, issues like import failure or incomplete recognition may occur.
For batch searching: After unifying extensions, system search, scripts, or file management rules can quickly locate all HTML files, reducing filtering costs.
For delivery and collaboration: When files need to be sent to colleagues, clients, or other teams, unifying them as .html reduces explanation costs, allowing the recipients to view and process them in the same way.
Therefore, batch converting htm to html and mhtml to html is actually a part of standardizing webpage file management, and is very suitable for completion through batch processing software.
Effect Preview: File Changes Before and After Processing
The figure below shows the state before processing. You can see that there are 4 webpage files in the folder, but the extensions are not identical: 1.mhtml, 2.htm, 3.htm, and 4.html exist simultaneously.

This situation is common when browsers save webpages, business systems export data, or files are migrated from old computers. Although they all display browser-related icons, for file management, the difference in extensions affects subsequent filtering, uploading, and batch processing.
After batch conversion, all 4 files in the folder have become .html files. The processing result is shown in the figure below: The naming conventions of 1.html, 2.html, 3.html, and 4.html are more unified.

From this effect, it can be seen that the core result of this operation is: outputting webpage files from different sources and with different extensions into a unified HTML format, facilitating subsequent office management.
Operation Steps: Batch Converting Webpage Files to HTML
Below is a complete operation process explained with software screenshots. The focus of the operation is not to modify files individually, but to use the batch processing capability of the office software to convert multiple files in one go.
Step 1: Open the Software and Enter the Text Tools Category
After launching HeSoft Doc Batch Tool , the left side of the interface will display multiple tool categories, such as Home, Task Flow, All Tools, File Name, File Organization, Word Tools, Excel Tools, PowerPoint Tools, PDF Tools, Text Tools, etc.
Since the files to be processed are HTML webpage files, you need to select Text Tools on the left side. After entering this category, the right side will display multiple functions related to text and webpage formats.

Among the function cards, find "HTML to HTML". In the screenshot, this function is highlighted, indicating the mouse has been positioned on it. Its description is batch converting HTML files to HTML file format, which is perfectly suitable for the scenario of unifying webpage files like htm, mhtml, html into html output.
The expected result of this step is to enter the correct function, avoiding mistakenly selecting other conversion directions like "HTML to TXT", "HTML to Word", or "HTML to PDF".
Step 2: Import the Webpage Files to be Converted
After clicking "HTML to HTML", you will enter the processing interface for this function. The function name is displayed on the top left of the interface, and operation buttons like Add Files, Import Files from Folder, Clear, and More can be seen on the top right.

If you have already placed all the webpage files to be processed in the same folder, you can click Import Files from Folder, which is more suitable for batch office processing. If you only want to process a few specific files, you can also click Add Files to select them manually.
After importing, the files will be displayed in the list. The list fields in the screenshot include Sequence, Name, Path, Extension, Creation Time, Modification Time, and Actions. Here, it can be clearly seen that the paths of the 4 files are all located in the D:\test directory, with extensions mhtml, htm, htm, and html respectively.
The operational purpose of this step is to let the software build a list of files to be processed. Only files appearing in the list will enter the subsequent conversion process.
Step 3: Check the Record Count and Extensions, Confirm No Wrong Files Selected
When batch processing files, checking after importing is crucial. The bottom of the screenshot shows the record count is 4, indicating 4 files will be processed this time. Users should confirm whether the quantity is correct based on the actual situation.
It is recommended to focus on checking the following: whether the filenames are the webpage files that need processing; whether the path is the target folder; whether the extensions belong to the webpage formats to be unified this time; whether any irrelevant files have been mistakenly added to the list.
If a row is found that does not need processing, you can use the delete icon in the "Actions" column to remove that record. If the entire list is imported incorrectly, you can click the Clear button at the top and re-add.
The expected result of this step is to obtain an accurate list of files to be processed, preparing for the subsequent batch conversion.
Step 4: Proceed to Next Step and Set Save Location
After confirming the list is correct, click the Next Step button at the bottom of the interface. According to the process prompts in the screenshot, the current step 1 is "Select records to process", followed by step 2 "Set save location" and step 3 "Start processing".
After entering the save location setting, you need to specify the output directory for the conversion results. It is recommended to choose a new empty folder to save the results, which can clearly distinguish the original files from the converted HTML files. For example, you can create a new "Converted HTML" folder for storing the output results uniformly.
This has two benefits: first, it avoids accidentally overwriting the original mhtml or htm files; second, after processing is complete, you can directly compare the file count and extensions to confirm whether the conversion results are complete.
Step 5: Start Processing and View the Unified HTML Files
After completing the save location setting, proceed to the start processing stage. The software will execute batch conversion according to the file records in the list and output the results to the specified directory.
After conversion is complete, open the output folder for inspection. According to the post-processing screenshot, all files have been unified to .html, including the original 1.mhtml, 2.htm, 3.htm, and 4.html. The processed filenames are 1.html, 2.html, 3.html, and 4.html respectively.
If the number of files is large, you can first check if the total count is consistent, then randomly open a few HTML files to confirm that the content displays correctly. For important materials, it is recommended to keep the original files for a period of time and proceed with archiving or delivery after confirming there are no errors.
Common Issues and Precautions
1. Why is it not recommended to just manually rename the extension? Manually changing the extension only alters the filename display and does not necessarily complete true format organization. For webpage archive files like mhtml, directly renaming them may not meet the requirements of subsequent systems. Using the conversion function is more suitable for formal office scenarios.
2. Do files that are already .html need to be processed? If the goal is to output the same batch of webpage files to a single result folder, they can be imported together. This way, the file naming and format in the final result directory are more neat, making it easier for unified delivery.
3. What if there are too many files during batch import? It is recommended to first gather the files to be processed into the same folder in File Explorer, then use "Import Files from Folder". This is faster than adding files one by one and less prone to omissions.
4. Where is it more appropriate to save the converted files? It is recommended to save them in a separate new folder, not mingled with the original files. After batch processing is complete, you can quickly confirm the conversion results by comparing the before and after folders.
5. How to avoid mistakenly processing files? Before clicking Next Step, be sure to check the paths, extensions, and record count in the list. Delete unnecessary files from the list first, then proceed with execution.
Summary: Leaving Webpage File Format Unification to Batch Processing Software is More Efficient
When webpage files like htm, mhtml, and html coexist in a folder, manually processing them one by one consumes a lot of time and is prone to errors. Using the "HTML to HTML" function of HeSoft Doc Batch Tool , these webpage files with different extensions can be imported at once, converted uniformly, and outputted in .html format.
For office users who frequently organize webpage data, export system pages, or archive project documents, this batch processing method can significantly reduce repetitive operations. It is recommended that before processing, you first gather the original files, use "Import Files from Folder" for batch addition, confirm the list, set an independent save location, and then start processing. This ensures clear results and improves file organization efficiency.