50 MB DOCX sample

A DOCX file of exactly 52,428,800 bytes. It is a valid Word document (Office Open XML) file, generated by this site. Compare its checksum and test it with the parser used by your application. Use it wherever you need a 50 MB sample, test or dummy DOCX file.

sample-docx-50mb.docx

50 MB52,428,800 bytes

Download 50 MB DOCX

Created in your browser and, in browsers that can stream to disk, sent straight to your downloads list; this can take a minute. No sign-up.

Type: application/vnd.openxmlformats-officedocument.wordprocessingml.document
SHA-256: b9028e09b50a7c01717a3e9ee7296baf3b8afa8f153b641ed0fa34642bdb7da0
Delivery: Created in your browser from static generator assets (how it works).

What is in this file

A short Word document with headings, body text, a list and a table, plus one embedded test-card PNG of 52,392,706 bytes, stored uncompressed and sized so that the document is exactly 52,428,800 bytes. Padding of 42,952,722 bytes in a private ancillary PNG chunk ("spAd", skipped by decoders) inside the image makes up the rest.

Contents	Headings, paragraphs, a bulleted list, a table and one image
Embedded image	PNG, 2,048 × 1,536 px
Macros	None
Tracked changes	None
Container	ZIP (Office Open XML)

First bytes of the file

The first 64 bytes of sample-docx-50mb.docx as a hex dump: offset, bytes, then the same bytes as text. The DOCX signature is 50 4B 03 04.

00000000  50 4b 03 04 14 00 00 00  08 00 00 00 21 5c fc a7 |PK..........!\..|
00000010  ae d0 9d 01 00 00 fc 06  00 00 13 00 00 00 5b 43 |..............[C|
00000020  6f 6e 74 65 6e 74 5f 54  79 70 65 73 5d 2e 78 6d |ontent_Types].xm|
00000030  6c b5 95 b1 6e db 30 10  86 f7 3e 85 a0 45 43 20 |l...n.0...>..EC |

Preview

DOCX files cannot be shown in a browser. Download the file and open it in an application that reads DOCX, such as Microsoft Word.

Where 50 MB matters

A 52,428,800-byte file: exactly the size at which Git hosting on GitHub starts warning about large files, and about the limit for a zipped AWS Lambda package uploaded directly.

All 50 MB sample files

Use this file for

Measuring download speed from your own server or CDN
Testing text indexing and search
Testing document uploads in HR, legal and education software

Testing notes for DOCX

Some gateways re-compress or strip ZIP files in transit, which corrupts the document.
Content sniffers often report DOCX as application/zip. Correct detection has to look inside the package for [Content_Types].xml.

DOCX format reference

Technical details

File name	sample-docx-50mb.docx
Format	DOCX (Word document (Office Open XML))
Extension	.docx
MIME type	application/vnd.openxmlformats-officedocument.wordprocessingml.document
Size	52,428,800 bytes (50 MB)
Kind	Binary
Signature	50 4B 03 04
SHA-256	b9028e09b50a7c01717a3e9ee7296baf3b8afa8f153b641ed0fa34642bdb7da0
Created	2026-10-23
Validation	See the listed size and SHA-256. Small downloads are checked in the browser; verify streamed downloads manually. A hash match does not prove parser compatibility.
Preview	Not available for this file; details only
Source	Generated in your browser by this site's generator; not copied from elsewhere
Licence	Free to use, modify and redistribute (terms)
Category	Documents

Check the stated structure and checksum against your application requirements. As with any download, scan the file with your own security tools before opening it. How files are made and checked

Verify your copy

This file is created in your browser, so it has no direct URL for curl or wget. The generator is designed to produce reproducible bytes. After saving, compare the checksum with the SHA-256 value above.

sha256sum sample-docx-50mb.docx     # Linux
shasum -a 256 sample-docx-50mb.docx # macOS

On Windows, run Get-FileHash sample-docx-50mb.docx -Algorithm SHA256 in PowerShell. For scripts and pipelines, save the file once and keep your own copy.

Related files

Questions about this file

Is this file exactly 50 MB?: Yes. It is 52,428,800 bytes, which is 50 MB in the binary units that operating systems and server limits use (1 KB = 1,024 bytes).
What is inside the 50 MB DOCX file?: A short Word document with headings, body text, a list and a table, plus one embedded test-card PNG of 52,392,706 bytes, stored uncompressed and sized so that the document is exactly 52,428,800 bytes. Padding of 42,952,722 bytes in a private ancillary PNG chunk ("spAd", skipped by decoders) inside the image makes up the rest.
Why does my server say the file is a ZIP archive?: Because it is one. Tools that only read the first bytes cannot tell DOCX from ZIP; they must check the package contents or fall back to the file extension.

Opening large files

Keep this tab open until your browser reports that the download is complete. Check the saved file size against the byte count on this page; a partial download may not open. For ordinary viewer tests, start with a 5 MB or 10 MB sample. Large samples are stress-test fixtures and may exceed the memory or file-size limits of your viewer.

DOCX generation is limited to 512 MB. Microsoft documents that Word can refuse larger files. Use ZIP or BIN for 1 GB transfer tests instead of expecting a 1 GB Word document to open.

Download