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Doc vs. Docx: Know the Difference

Shumaila Saeed
By Shumaila Saeed || Updated on December 25, 2023
Doc is a binary file format for Word documents, while Docx is a newer, XML-based format that is smaller in size and more secure.
Doc vs. Docx

Key Differences

Doc is the traditional file format used by Microsoft Word before 2007. It is a binary format, which means it stores data in a specific, encoded way. Docx, introduced with Word 2007, is based on the Office Open XML format, making it more efficient and easier to manage.
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Shumaila Saeed
Nov 19, 2023
Doc files are typically larger because of their binary structure, which can make sharing and transferring these files more cumbersome. In contrast, Docx files are smaller and more compact due to their XML structure, facilitating easier sharing and faster uploads.
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Compatibility is a notable difference; Doc files can be opened by almost all versions of Microsoft Word. However, Docx files require newer versions of Word or a compatibility pack for older versions, due to their modern XML format.
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In terms of security, Docx is considered more secure. Its XML structure allows it to be more resistant to corruption and less prone to virus attacks compared to the older Doc format.
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Regarding formatting and data handling, Docx files are more reliable. They handle complex formatting, images, and styles more efficiently than Doc files, which can sometimes struggle with complex document structures.
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Comparison Chart

File Size

Generally larger due to binary coding.
Smaller and more efficient.
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Nov 19, 2023

Compatibility

Can be opened by almost all Word versions.
Requires newer versions or compatibility pack.
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Security

Less secure, more prone to corruption.
More secure and resistant to corruption.
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Formatting

May struggle with complex structures.
Handles complex formatting more efficiently.
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Introduced

Used before Word 2007.
Introduced with Word 2007.
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Doc and Docx Definitions

Doc

Doc files are widely compatible with various Word versions.
Send me the document in Doc format so I can open it on my old computer.
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Nov 10, 2023

Docx

Docx requires newer Word versions or a compatibility pack to open.
If you can't open this Docx file, you might need to update your Word software.
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Nov 10, 2023

Doc

Doc files tend to be larger and less secure than Docx files.
I prefer Docx, but for this case, save it as a Doc due to size concerns.
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Nov 10, 2023

Docx

Docx is an XML-based file format introduced with Microsoft Word 2007.
For the latest features, save your document as a Docx file.
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Shumaila Saeed
Nov 10, 2023

Doc

Doc is a file format used by Microsoft Word before 2007.
Please save the report as a Doc file for compatibility.
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Nov 10, 2023
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Docx

Docx files are smaller, more efficient, and secure compared to Doc.
Use Docx format for a more compact and secure document.
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Nov 10, 2023

Doc

Doc format is known for its binary coding of document data.
Older Word documents are typically in the Doc format.
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Docx

Docx format supports advanced formatting and multimedia integration.
To preserve the layout, I'll save the brochure as a Docx.
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Nov 10, 2023

Doc

Doc is less efficient in handling complex document structures.
Avoid using too many images in a Doc file, as it may become unwieldy.
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Nov 10, 2023

Docx

Docx is preferred for its better handling of complex document structures.
For our annual report, let's use Docx for its superior formatting capabilities.
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Doc

A person with an advanced degree licensed to practice in a medical field, such as a physician, dentist, or veterinarian.
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Doc

(informal) A doctor.
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Doc

A document, especially (in professional jargon) a piece of technical documentation or legal evidence.
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Doc

(informal) A documentary.
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Doc

Clipping of doctorate
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Doc

A licensed medical practitioner;
I felt so bad I went to see my doctor
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Doc

The United States federal department that promotes and administers domestic and foreign trade (including management of the census and the patent office); created in 1913
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Repeatedly Asked Queries

Can I open Docx files in older versions of Word?

To open Docx files in older Word versions, a compatibility pack is needed.
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What is a Doc file?

A Doc file is a Microsoft Word document file format used before 2007.
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Why are Docx files more secure than Doc files?

Docx files have a more robust structure, making them less prone to corruption and security issues.
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Can I open Doc files on non-Microsoft word processors?

Most word processors support Doc files, but compatibility may vary.
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Is there a significant size difference between Doc and Docx files?

Yes, Docx files are generally smaller and more efficient than Doc files.
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How can I convert a Docx file to a Doc file?

You can convert a Docx file to Doc using the "Save As" feature in Word and selecting the Doc format.
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How is Docx different from Doc?

Docx is an XML-based format, smaller and more secure, whereas Doc is a larger, binary format.
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Nov 19, 2023

Can Doc handle complex formatting as well as Docx?

Docx handles complex formatting and multimedia better than the older Doc format.
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What are the benefits of using Docx over Doc?

Docx offers better security, efficiency, and formatting capabilities.
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Does the Doc format support multimedia elements?

While Doc supports multimedia, Docx handles these elements more efficiently.
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How does the binary structure of Doc affect its use?

The binary structure of Doc files makes them larger and less efficient compared to Docx.
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Are there any compatibility issues with Docx files?

Some older systems may have issues with Docx files, requiring a compatibility pack.
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Nov 19, 2023

Are Doc files compatible with all versions of Word?

Yes, Doc files can be opened by almost all versions of Microsoft Word.
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Shumaila Saeed
Nov 19, 2023

Will I lose any data if I convert a Doc file to Docx?

Converting from Doc to Docx usually retains all data, but complex formatting may need adjustments.
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Which format is better for long, complex documents?

Docx is better for long, complex documents due to its efficient handling of formatting and data.
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Is it necessary to update Word to use Docx files?

Using the latest Word versions is recommended for full Docx support.
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Why was the Docx format introduced?

Docx was introduced to provide a more efficient, secure, and modern format for Word documents.
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Is Docx suitable for sharing documents online?

Yes, Docx is ideal for online sharing due to its smaller size and compatibility with modern systems.
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Can I edit a Docx file in an online word processor?

Yes, most online word processors support editing Docx files.
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Do all printers support printing Doc and Docx files?

Printers generally support both formats, but the printing software needs to be compatible.
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About Author
Shumaila Saeed
Written by
Shumaila Saeed
Shumaila Saeed, an expert content creator with 6 years of experience, specializes in distilling complex topics into easily digestible comparisons, shining a light on the nuances that both inform and educate readers with clarity and accuracy.

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