50 MB XLSX sample

An XLSX file of exactly 52,428,800 bytes. It is a valid Excel workbook (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 XLSX file.

sample-xlsx-50mb.xlsx

50 MB52,428,800 bytes

Download 50 MB XLSX

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.spreadsheetml.sheet
SHA-256: 2fcd40e19d0dbf7165700726fedec70146be883070d79c1dc70336d30ebd857e
Delivery: Created in your browser from static generator assets (how it works).

What is in this file

One worksheet with 12,290 fictional order rows, nine order columns and a fixture-notes column. Worksheet XML is stored without ZIP compression to reach the requested size without exceeding Excel row limits or creating a much larger decompressed worksheet. Large workbooks still require substantial memory in the application that opens them.

Sheets	1 (Orders)
Data rows	12,290
Columns	10
Macros	None
Container	ZIP (Office Open XML)

First bytes of the file

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

00000000  50 4b 03 04 14 00 00 00  08 00 00 00 21 5c 19 27 |PK..........!\.'|
00000010  be 30 61 01 00 00 96 03  00 00 13 00 00 00 5b 43 |.0a...........[C|
00000020  6f 6e 74 65 6e 74 5f 54  79 70 65 73 5d 2e 78 6d |ontent_Types].xm|
00000030  6c b2 b1 af c8 cd 51 28  4b 2d 2a ce cc cf b3 55 |l.....Q(K-*....U|

Preview

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

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
Load-testing importers with many rows
Testing spreadsheet import features

Testing notes for XLSX

A date cell is a number with a format; importers that ignore the format show values such as 45123 instead of a date.
Reading a large workbook with a DOM-style library can use many times the file size in memory. Test with the 5 MB and 10 MB samples and prefer streaming readers.

XLSX format reference

Technical details

File name	sample-xlsx-50mb.xlsx
Format	XLSX (Excel workbook (Office Open XML))
Extension	.xlsx
MIME type	application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
Size	52,428,800 bytes (50 MB)
Kind	Binary
Signature	50 4B 03 04
SHA-256	2fcd40e19d0dbf7165700726fedec70146be883070d79c1dc70336d30ebd857e
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	Spreadsheets

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-xlsx-50mb.xlsx     # Linux
shasum -a 256 sample-xlsx-50mb.xlsx # macOS

On Windows, run Get-FileHash sample-xlsx-50mb.xlsx -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 XLSX file?: One worksheet with 12,290 fictional order rows, nine order columns and a fixture-notes column. Worksheet XML is stored without ZIP compression to reach the requested size without exceeding Excel row limits or creating a much larger decompressed worksheet. Large workbooks still require substantial memory in the application that opens them.
Do the workbooks contain macros?: No. They are plain .xlsx files with one worksheet, a frozen header row and simple multiplication formulas.

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.

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