Validate DOCX File Format Online

Not sure if a file is a genuine Word document? Our validator checks the file structure instantly.

What is DOCX?

DOCX is Microsoft Word's modern format. It's actually a ZIP archive containing:

• XML documents
• Media files
• Styles and formatting

Why Validate?

• Verify downloads - Ensure files aren't corrupted
• Check conversions - Confirm format changes worked
• Troubleshoot - Find why a file won't open
• Security - Detect potentially malicious files

How Validation Works

We check for:

• ZIP signature - Valid archive structure
• Document structure - Expected DOCX contents

A valid DOCX will show a green checkmark. Invalid files get a red X with details.

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Validate your DOCX files with our free online tool!