10 KB TXT sample file
A TXT file of exactly 10,240 bytes. It is a valid Plain text file, generated for this site and checked with an independent parser.
Download
sample-txt-10kb.txt
10 KB10,240 bytes
Download 10 KB TXTDirect download. No sign-up and no waiting.
- Type
- text/plain
- SHA-256
b4a9883beac8b8509c6b8132bc0fac5f3f207445acf7c3cece670ffc3cf1ae70- Direct URL
https://sampletestfiles.com/downloads/txt/sample-txt-10kb.txt
What is in this file
101 numbered lines of plain English text, each prefixed with its line number and starting byte offset so truncation is easy to spot. A closing rule of "=" characters brings the file to the exact size.
| Numbered lines | 101 |
|---|---|
| Encoding | UTF-8 (ASCII characters only) |
| Line endings | LF (Unix) |
How the file begins
The opening lines of sample-txt-10kb.txt, exactly as they appear in the file.
SampleTestFiles sample text file (10 KB)
Encoding: ASCII, which is also valid UTF-8. Line endings: LF.
Each numbered line starts with its line number and the byte offset at which it begins.
0000001 000000191 This sample file exists so that software can be tested with realistic input.
0000002 000000286 Every line in this document was generated by a script and describes nothing confidential.
0000003 000000394 Use it to check that uploads, downloads and parsers behave the way you expect.
0000004 000000491 The file was built to an exact byte count, which makes size limits easy to verify.
0000005 000000592 If the last line of this file is missing, the transfer was cut short.
0000006 000000680 A good test fixture is boring, predictable and identical every time it is downloaded.
0000007 000000784 Compare the checksum published on the download page with the one you compute locally.Preview
Shows the file contents.
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
- Testing line-ending normalisation
- Measuring transfer speed with compressible content
Testing notes for TXT
- An empty or whitespace-only file is still a valid text file and is worth a test of its own.
- Plain text compresses very well, so a 10 MB text file may travel as a fraction of that when gzip or Brotli is enabled. Use the BIN samples when you need incompressible bytes.
Technical details
| File name | sample-txt-10kb.txt |
|---|---|
| Format | TXT (Plain text) |
| Extension | .txt |
| MIME type | text/plain |
| Size | 10,240 bytes (10 KB) |
| Kind | Text |
| SHA-256 | b4a9883beac8b8509c6b8132bc0fac5f3f207445acf7c3cece670ffc3cf1ae70 |
| Created | 2026-10-10 |
| Validation | Exact size, signature bytes and structure checked when the file was generated |
| Preview | Available on this page |
| Source | Generated for this site; not copied from elsewhere |
| Licence | Free to use, modify and redistribute (terms) |
| Category | Documents |
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-txt-10kb.txt 'https://sampletestfiles.com/downloads/txt/sample-txt-10kb.txt'
sha256sum sample-txt-10kb.txt # Linux
shasum -a 256 sample-txt-10kb.txt # macOSOn Windows, run Get-FileHash sample-txt-10kb.txt -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 TXT file?
- 101 numbered lines of plain English text, each prefixed with its line number and starting byte offset so truncation is easy to spot. A closing rule of "=" characters brings the file to the exact size.
- Why does each line start with numbers?
- Each line carries its line number and the byte offset where it begins. If a transfer is truncated or corrupted you can see exactly where.