25 KB PDF sample file

A PDF file of exactly 25,600 bytes. It is a valid Portable Document Format file, generated for this site and checked with an independent parser.

sample-pdf-25kb.pdf

25 KB25,600 bytes

Download 25 KB PDF

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Type: application/pdf
SHA-256: 50c3af22aa0fb76e09050639f725688defb177e049e21a757b83cdd300487c5c
Direct URL: https://sampletestfiles.com/downloads/pdf/sample-pdf-25kb.pdf

What is in this file

5 pages of selectable text set in Helvetica, with uncompressed content streams. 80 bytes of PDF comment lines before the cross-reference table bring the file to the exact size.

Pages	5
Page size	A4 (595 × 842 pt)
PDF version	1.4
Fonts	Helvetica, Helvetica-Bold (standard, not embedded)
Images	None
Encrypted	No
Text selectable	Yes

First bytes of the file

The first 64 bytes of sample-pdf-25kb.pdf as a hex dump: offset, bytes, then the same bytes as text. The PDF signature is 25 50 44 46 2D.

00000000  25 50 44 46 2d 31 2e 34 0a 25 e2 e3 cf d3 0a 31  |%PDF-1.4.%.....1|
00000010  20 30 20 6f 62 6a 0a 3c 3c 20 2f 54 79 70 65 20  | 0 obj.<< /Type |
00000020  2f 43 61 74 61 6c 6f 67 20 2f 50 61 67 65 73 20  |/Catalog /Pages |
00000030  32 20 30 20 52 20 3e 3e 0a 65 6e 64 6f 62 6a 0a  |2 0 R >>.endobj.|

Preview

Displays the file in your browser.

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
Exercising virus scanning and content inspection
Testing document upload forms and size limits

Testing notes for PDF

A file cut off before its final "%%EOF" marker usually cannot be opened, which makes PDF a good format for detecting truncated transfers.
PDFs can embed JavaScript and attachments, so upload handlers should scan them rather than trust the extension. The samples here contain neither.

PDF format reference

Technical details

File name	sample-pdf-25kb.pdf
Format	PDF (Portable Document Format)
Extension	.pdf
MIME type	application/pdf
Size	25,600 bytes (25 KB)
Kind	Binary
Signature	25 50 44 46 2D
SHA-256	50c3af22aa0fb76e09050639f725688defb177e049e21a757b83cdd300487c5c
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-pdf-25kb.pdf 'https://sampletestfiles.com/downloads/pdf/sample-pdf-25kb.pdf'
sha256sum sample-pdf-25kb.pdf     # Linux
shasum -a 256 sample-pdf-25kb.pdf # macOS

On Windows, run Get-FileHash sample-pdf-25kb.pdf -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 PDF file?: 5 pages of selectable text set in Helvetica, with uncompressed content streams. 80 bytes of PDF comment lines before the cross-reference table bring the file to the exact size.
Are the PDFs password-protected or signed?: No. They are unencrypted, unsigned and contain no forms, scripts or attachments.

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