doc is an old version of Word document format. In order to improve file compatibility and avoid opening problems, it is necessary to convert it into a new version of docx format. If we have a lot of doc format files to convert to docx format, we can use these 5 batch conversion methods: HeSoft Doc Batch Tool WPS Office, ASPOSE online tools, LibreOffice command line, Word folder save file.
Under what circumstances do you need to uniformly convert doc into docx
1. Unified document format
there are a large number of Word documents in the computer, some of which are old documents left behind or old doc format. In order to unify the file format and facilitate post-archiving and long-term storage, these file formats need to be unified to docx.
(2) Increased compatibility
docx is the default format for the new version after Microsoft Office 2007 and has better compatibility in the new version of Word and other office software. If it is an old version of the doc format, it is easy to open or file format disorder. The unified conversion to docx format can effectively improve file compatibility and avoid these problems.
3. Save storage space
the docx format is based on XML compression storage, while doc is binary storage. For two files with the same content, the volume of doc format is 1-2 times larger than docx. After converting doc files into docx format in batches, more storage space can be saved.
4, the need for long-term preservation
if we want to save Word documents for a long time, using the new docx format can reduce the problems caused by future format elimination.
Preview of the effect of converting doc into docx format in batch
before treatment:

after treatment:

method 1: Use HeSoft Doc Batch Tool Batch convert doc to docx
recommended Index:★★★★★
Advantages:
- the operation steps are simple and direct. Select Word to docx function and import all doc files to complete the automatic conversion.
- It is not affected by network speed, the conversion speed is fast, and there is no need to upload and download files, and the converted documents are saved directly on the computer.
- There is no file size and number limit, no matter how large files, whether hundreds or thousands of files, can be converted at one time.
Disadvantages:
- it needs to be installed on the computer.
Operation steps:
1. Open 【 HeSoft Doc Batch Tool ], select [Word Tool]-[Word Convert to Docx]].

2. Import all Word documents that need to be converted, supporting doc, docm, dot, dotx, dotm and other formats.

3. After the conversion is completed, directly click on the save location to view, and all documents have been successfully converted into docx format.

Method 2: Batch convert Word document format with WPS Office
recommended Index:★★★★☆
advantages:
- the operation is simple, you can import all documents with one click, and then convert them into docx format in batches. Novices can get started quickly.
- Real batch processing, you can convert hundreds of doc files at the same time, do not need to manually convert one by one.
- Chinese support is good, feature-rich, many automated office functions, suitable for daily use by users.
Disadvantages:
- to be installed on a computer, the batch conversion feature requires membership.
Operation steps:
1. Open WPS Office and find the function of [Batch Change Document Format] in the application market.
2. Click [Add File] to import all doc files that need to be converted. Select [docx] as the target format. After setting the save location, click [Batch Output].

Method 3: Convert file formats directly using ASPOSE online tool
recommended Index:★★★★☆
advantages:
- don't need to download and install, directly open in the browser to use, save time.
- The operation is simple and clear. Upload all doc files and select the conversion format to docx to convert the document format with one click.
- Support dozens of languages, no matter which country people, can use this tool to convert file formats.
Disadvantages:
- the file needs to be uploaded to a third-party platform and is not suitable for handling internal files.
Operation steps:
open the ASPOSE online tool, select [Convert], upload the file that needs to be converted, save it as [docx], and finally click [Convert].

Method 4: Batch convert doc to docx using command line LibreOffice
recommended Index:★★★☆ ☆
advantages:
- supports automatic conversion of large quantities of files, and can realize one-click automatic conversion of hundreds or even thousands of docx files.
- Automatic file format conversion using command logic for Windows, macOS, and Linux operating systems.
- Local conversion, high security, strong confidentiality, suitable for handling sensitive files.
Disadvantages:
- the use of high threshold, the need to install LibreOffice, familiar with the basic command line operation, not suitable for novice use.
Operation steps:
1. Install the LibreOffice on the computer first, and then put all the doc documents to be converted into the same folder.
2. Open the command prompt, switch to the directory where doc files are stored, enter the code soffice-headless-convert-to docx *.doc, and execute the batch conversion command. After the conversion is completed, a batch of docx files is automatically generated in the current directory.

Method 5: Bulk save to docx format with Word folder
recommended Index:★★☆ ☆ ☆
advantages:
- you don't need to use other tools, as long as you have Office on your computer, you can convert file formats, which is lighter.
- The operation is very simple, as long as you choose to save the file as docx format, there is no difficulty, one step in place.
Disadvantages:
- need to manually save one by one as docx format, inefficient, only suitable for processing a small number of files.
Operation steps:
open Office Word, click [File]-[Open]-[Browse], select all doc files, and Word will automatically open all doc files. Click [File]-[Save As], select [docx] format, and all files can be operated in turn.
