Generate a sample DOCX file
Download a Word-format fixture for document-upload tests. It contains two short paragraphs; a separate binary part supplies the chosen file size.
1 MB = 1,000,000 B · 1 MiB = 1,048,576 B
Advanced: test an upload limit
Enter the byte limit above, then choose one byte below, the exact limit or one byte above. Each choice uses the same base: 10,485,760 B. Generate and download each file to test your endpoint.
What to test with a DOCX fixture
Inspect the ZIP/XML package, open it in your target document reader and check the downloaded byte count. Test mail attachment limits separately from application upload limits.
20 MB DOCX download · PDF document fixture · Convert Office documents to PDF
Choose a size here
These options set the generator above. Separate size guides explain how to test a particular upload boundary.
Guides for specific upload limits
File structure and testing limits
A ZIP-based Office Open XML package with two short paragraphs. A declared binary part supplies the extra size; it does not add text, macros or embedded documents.
Format reference: ECMA-376.
This generator assembles the file in your browser; file content is not sent to a server. Site analytics may make network requests. Office ↔ PDF conversion uses a separate server workflow. Data processing and privacy.
Measured regression fixture (2026-10-13): 20,971,520 bytes. Validation method and limits.
Technical notes for every format · Guide to testing file upload limits
Questions
How small can a DOCX file be?
About 1,496 bytes. Below that the format cannot carry its mandatory structure, let alone padding.
Does this DOCX contain megabytes of readable text?
No. Its ZIP package contains a short word/document.xml and a binary payload declared in [Content_Types].xml. Re-saving in an editor can remove or rewrite that payload.
Can I ask for an unusual size?
Any byte count above the minimum works — for example 3,145,728 bytes (exactly 3 MB) or 27.5 MB. Drag the caliper or type the number.
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