1 KB HTML sample file

An HTML file of exactly 1,024 bytes. It is a valid HyperText Markup Language file, generated for this site and checked with an independent parser.

sample-html-1kb.html

1 KB1,024 bytes

Download 1 KB HTML

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Type: text/html
SHA-256: b669e647d2e601b4de023130a8d29a8e7c1099e3fc476f55e8b2b0f086f50f1e
Direct URL: https://sampletestfiles.com/downloads/html/sample-html-1kb.html

What is in this file

A complete HTML document with 0 sections of headings and paragraphs and one small inline style block. It loads no scripts or external resources. An HTML comment before the closing tags brings it to the exact size.

Sections	0
Doctype	HTML (Living Standard)
Scripts	None
External resources	None
Encoding	UTF-8 (ASCII characters only)

How the file begins

The opening lines of sample-html-1kb.html, exactly as they appear in the file.

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta name="robots" content="noindex">
<title>Sample HTML file (1 KB)</title>
<style>body{font-family:system-ui,sans-serif;line-height:1.5;max-width:42rem;margin:2rem auto;padding:0 1rem}h2{margin-top:2rem}</style>
</head>
<body>
<main>
<h1>Sample HTML file (1 KB)</h1>
<p>A static test page with no scripts, no external resources and no tracking.</p>

Preview

Shows the file contents.

Where 1 KB matters

The smallest practical test file: 1,024 bytes, small enough to travel in a single network packet. These are the default limits a file of this size is useful for testing:

System	Limit	Note
Ethernet	1,500 bytes (typical MTU)	A 1 KB payload fits in one packet with its headers.
Browser cookies	4,096 bytes per cookie	1 KB is well inside the limit; the 5 KB sample is over it.

All 1 KB sample files

Use this file for

Smoke tests in CI that must run in milliseconds
Testing HTML sanitisers and upload filters
Checking Content-Type and Content-Disposition handling

Testing notes for HTML

Serve uploaded HTML with Content-Disposition: attachment or from a separate domain, and send X-Content-Type-Options: nosniff.
A text file that merely starts with a tag can be sniffed as HTML by older browsers if the Content-Type header is missing.

HTML format reference

Technical details

File name	sample-html-1kb.html
Format	HTML (HyperText Markup Language)
Extension	.html
MIME type	text/html
Size	1,024 bytes (1 KB)
Kind	Text
Signature	3C 21 44 4F 43 54 59 50 45
SHA-256	b669e647d2e601b4de023130a8d29a8e7c1099e3fc476f55e8b2b0f086f50f1e
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-html-1kb.html 'https://sampletestfiles.com/downloads/html/sample-html-1kb.html'
sha256sum sample-html-1kb.html     # Linux
shasum -a 256 sample-html-1kb.html # macOS

On Windows, run Get-FileHash sample-html-1kb.html -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 1 KB?: Yes. It is 1,024 bytes, which is 1 KB in the binary units that operating systems and server limits use (1 KB = 1,024 bytes).
What is inside the 1 KB HTML file?: A complete HTML document with 0 sections of headings and paragraphs and one small inline style block. It loads no scripts or external resources. An HTML comment before the closing tags brings it to the exact size.
Do the HTML samples run any scripts?: No. They are static documents with one small inline style block, no scripts and no external resources, and they are marked noindex.

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