10 KB XLSX sample file
An XLSX file of exactly 10,240 bytes. It is a valid Excel workbook (Office Open XML) file, generated for this site and checked with an independent parser.
Download
sample-xlsx-10kb.xlsx
10 KB10,240 bytes
Download 10 KB XLSXDirect download. No sign-up and no waiting.
- Type
- application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
- SHA-256
8f8643db2547670e67948a18479f3c4365046092e82aa5d78936571e2becd5b9- Direct URL
https://sampletestfiles.com/downloads/xlsx/sample-xlsx-10kb.xlsx
What is in this file
One worksheet with a bold, frozen header row and 95 rows of fictional orders: text, dates, numbers and a formula in every row. 47 bytes of text in the workbook description property bring the file to the exact size.
| Sheets | 1 (Orders) |
|---|---|
| Data rows | 95 |
| Columns | 9 |
| Formulas | 95 (total = quantity × unit price) |
| Frozen panes | Header row |
| Macros | None |
| Container | ZIP (Office Open XML) |
First bytes of the file
The first 64 bytes of sample-xlsx-10kb.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 2f 01 00 00 96 03 00 00 13 00 00 00 5b 43 |.0/...........[C|
00000020 6f 6e 74 65 6e 74 5f 54 79 70 65 73 5d 2e 78 6d |ontent_Types].xm|
00000030 6c ad 93 cf 4e 02 31 10 c6 ef 3e 45 d3 2b d9 16 |l...N.1...>E.+..|Preview
XLSX files cannot be shown in a browser. Download the file and open it with Microsoft Excel.
Where 10 KB matters
A 10,240-byte file that still arrives in the first round trip of a new connection. These are the default limits a file of this size is useful for testing:
| System | Limit | Note |
|---|---|---|
| TCP initial congestion window | About 14.6 KB (10 segments) | A 10 KB response fits in the first flight of packets; the 25 KB sample does not. |
| nginx and Apache request headers | 8 KB per header line by default | Data this large must go in the request body. |
| webpack asset modules | 8 KB by default | Assets over the threshold are emitted as files instead of data URIs. |
Use this file for
- Checking thumbnail and icon handling
- Verifying formula handling
- Load-testing importers with many rows
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.
Technical details
| File name | sample-xlsx-10kb.xlsx |
|---|---|
| Format | XLSX (Excel workbook (Office Open XML)) |
| Extension | .xlsx |
| MIME type | application/vnd.openxmlformats-officedocument.spreadsheetml.sheet |
| Size | 10,240 bytes (10 KB) |
| Kind | Binary |
| Signature | 50 4B 03 04 |
| SHA-256 | 8f8643db2547670e67948a18479f3c4365046092e82aa5d78936571e2becd5b9 |
| Created | 2026-10-10 |
| Validation | Exact size, signature bytes and structure checked when the file was generated |
| Preview | Not available for this format; details only |
| Source | Generated for this site; not copied from elsewhere |
| Licence | Free to use, modify and redistribute (terms) |
| Category | Spreadsheets |
Validated for expected format and integrity. As with any download, scan the file with your own security tools before opening it. How files are made and checked
Download from the command line and verify
Fetch the file with curl, then compare its checksum with the SHA-256 value above.
curl -o sample-xlsx-10kb.xlsx 'https://sampletestfiles.com/downloads/xlsx/sample-xlsx-10kb.xlsx'
sha256sum sample-xlsx-10kb.xlsx # Linux
shasum -a 256 sample-xlsx-10kb.xlsx # macOSOn Windows, run Get-FileHash sample-xlsx-10kb.xlsx -Algorithm SHA256 in PowerShell. A matching value proves that the download is complete and unaltered.
Related files
Questions about this file
- Is this file exactly 10 KB?
- Yes. It is 10,240 bytes, which is 10 KB in the binary units that operating systems and server limits use (1 KB = 1,024 bytes).
- What is inside the 10 KB XLSX file?
- One worksheet with a bold, frozen header row and 95 rows of fictional orders: text, dates, numbers and a formula in every row. 47 bytes of text in the workbook description property bring the file to the exact size.
- How many rows are in the 10 MB XLSX sample?
- The exact row count is listed on each download page. Because XLSX is compressed, a 10 MB workbook holds a few hundred thousand rows.