How do I create a dummy Word document of a specific size?

Open the Document tab, choose DOCX (it's preselected on this page), enter the target size in MB and click Generate. The document is created in your browser and downloads automatically.

Do the generated documents open in Word and Excel?

Yes. DOCX and XLSX files are valid Office Open XML documents and open in Microsoft Office and compatible applications. CSV, TXT, RTF, HTML and EML files open in any program that supports those formats.

Are the JSON, XML and ZIP files valid?

Yes. JSON and GeoJSON parse with any JSON parser, XML is well-formed, and ZIP archives open in any unzip tool. The size padding is stored in places the formats allow, such as whitespace or comments.

How large can a generated document be?

It depends on the format: up to 500 MB for DOCX, TXT, CSV, RTF, HTML, XML, JSON and ZIP, 2,000 MB for GeoJSON, 200 MB for EML and 50 MB for XLSX.

Are my documents uploaded to a server?

No. Documents are generated in your browser and saved directly to your device. Nothing is sent to FileMock's servers.

Dummy Document Generator - DOCX, XLSX, CSV & JSON

Dummy Document Generator

Create mock Word, Excel, CSV, JSON and other documents of the exact size you need. DOCX is already selected below: pick another format if you need one, enter a size and generate.

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Audio

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Document

Document File Generator

Generate mock documents in various formats for testing workflows.

Target file size (MB):

Document format:

📄DOCX • Structured Content • Max 500 MB

Compatible with all major applications and editors

Formats and What's Inside

DOCX (Word): a document with a title, generation date and numbered Lorem ipsum paragraphs. Up to 500 MB.
XLSX (Excel): a worksheet with a header and rows of sample text. Up to 50 MB.
CSV: a header row (ID, Name, Email, Department, Salary, Join_Date) followed by sample employee rows. Up to 500 MB. A tab-separated TXT variant is also available.
TXT and RTF: plain and rich text with numbered Lorem ipsum paragraphs. Up to 500 MB.
HTML: a web page with headings and paragraphs. Up to 500 MB.
EML: a plain-text email message with sender, recipient and subject headers. Up to 200 MB.
JSON and XML: well-formed data with a metadata block and numbered items. Up to 500 MB.
GeoJSON: a FeatureCollection of points, lines and polygons with properties. Up to 2,000 MB.
ZIP: an archive containing one text file. Up to 500 MB.

PDF is available in the same Document tab, and the PDF generator page has its own guide and FAQ.

File Sizes

Every format comes out at exactly the size you enter. FileMock uses binary megabytes, so 1 MB = 1,048,576 bytes.

To hit the exact size, the remaining bytes go where each format allows them: whitespace in JSON and GeoJSON, a comment in XML, HTML and RTF, the archive comment in ZIP, DOCX and XLSX, and a padded name in the last CSV row, so every file stays valid and every row stays complete.

Structured formats have a minimum size: about 2 KB for DOCX and 20 KB for XLSX. The size field shows the allowed range for the selected format.

Common Uses for Dummy Documents

Document uploads: test accepted formats, size limits and previews for Word and Excel files.
Import features: check CSV imports with large files and thousands of rows.
Email processing: feed EML files into mail parsers and archiving tools.
Search and indexing: check text extraction and indexing jobs on large text documents.
Storage testing: fill folders and quotas with documents of a known size.

Related Guides

Document Generator FAQ

Answers to common questions about generating dummy documents.