25 KB TXT sample file

A TXT file of exactly 25,600 bytes. It is a valid Plain text file, generated for this site and checked with an independent parser.

sample-txt-25kb.txt

25 KB25,600 bytes

Download 25 KB TXT

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Type: text/plain
SHA-256: f8c946a356816e224387eab095ac644201fc365918981e82d7b94df9b4682f7a
Direct URL: https://sampletestfiles.com/downloads/txt/sample-txt-25kb.txt

What is in this file

255 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	255
Encoding	UTF-8 (ASCII characters only)
Line endings	LF (Unix)

How the file begins

The opening lines of sample-txt-25kb.txt, exactly as they appear in the file.

SampleTestFiles sample text file (25 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 25 KB matters

A 25,600-byte file: the size of a small web image or a short document. 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)	25 KB needs at least two flights of packets on a new connection.
Base64 encoding	Adds 33 percent	A 25 KB file becomes about 34 KB inside JSON or an email.

All 25 KB sample files

Use this file for

Testing avatar and logo uploads
Measuring transfer speed with compressible content
Baseline upload and download tests

Testing notes for TXT

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.
Line endings change the byte count: converting LF to CRLF adds one byte per line, which breaks checksum comparisons.

TXT format reference

Technical details

File name	sample-txt-25kb.txt
Format	TXT (Plain text)
Extension	.txt
MIME type	text/plain
Size	25,600 bytes (25 KB)
Kind	Text
SHA-256	f8c946a356816e224387eab095ac644201fc365918981e82d7b94df9b4682f7a
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-25kb.txt 'https://sampletestfiles.com/downloads/txt/sample-txt-25kb.txt'
sha256sum sample-txt-25kb.txt     # Linux
shasum -a 256 sample-txt-25kb.txt # macOS

On Windows, run Get-FileHash sample-txt-25kb.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 25 KB?: Yes. It is 25,600 bytes, which is 25 KB in the binary units that operating systems and server limits use (1 KB = 1,024 bytes).
What is inside the 25 KB TXT file?: 255 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.
Which encoding do the text samples use?: The sized samples use only ASCII characters, which makes them valid UTF-8, ASCII and Latin-1 at once. A separate multilingual sample covers non-ASCII text.

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