5 KB HTML sample
An HTML file of exactly 5,120 bytes. It is a valid HyperText Markup Language file, generated by this site. Compare its checksum and test it with the parser used by your application. Use it wherever you need a 5 KB sample, test or dummy HTML file.
Download
sample-html-5kb.html
5 KB5,120 bytes
Download 5 KB HTMLCreated in your browser in a few seconds, then checked against the SHA-256 checksum. The file is not uploaded anywhere. No sign-up.
- Type
- text/html
- SHA-256
d4b4075667a024ff878688993c754dd0f6c61745f02218a2ae5e496fa0b91a27- Delivery
- Created in your browser from static generator assets (how it works).
What is in this file
A static HTML5 page with 5 sections of headings, paragraphs, lists and tables. It has no scripts, no external resources and a noindex robots tag. An HTML comment before the closing tags brings the file to the exact size.
| Sections | 5 |
|---|---|
| Doctype | HTML5 |
| Scripts | None |
| External resources | None |
| Styles | One inline style element |
| Encoding | UTF-8 (ASCII characters only) |
How the file begins
The opening lines of sample-html-5kb.html, exactly as they appear in the file.
00000000 3c 21 44 4f 43 54 59 50 45 20 68 74 6d 6c 3e 0a |<!DOCTYPE html>.|
00000010 3c 68 74 6d 6c 20 6c 61 6e 67 3d 22 65 6e 22 3e |<html lang="en">|
00000020 0a 3c 68 65 61 64 3e 0a 3c 6d 65 74 61 20 63 68 |.<head>.<meta ch|
00000030 61 72 73 65 74 3d 22 75 74 66 2d 38 22 3e 0a 3c |arset="utf-8">.<|Preview
Shows the file contents.
Where 5 KB matters
A 5,120-byte file: larger than a cookie, smaller than a typical HTTP header limit. These are the default limits a file of this size is useful for testing:
| System | Limit | Note |
|---|---|---|
| Browser cookies | 4,096 bytes per cookie | 5 KB does not fit in one cookie. |
| Vite asset inlining | 4 KB by default (assetsInlineLimit) | A 5 KB asset is emitted as a separate file rather than inlined as base64. |
| nginx and Apache request headers | 8 KB per header line by default | 5 KB fits; the 10 KB sample does not. |
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.
Technical details
| File name | sample-html-5kb.html |
|---|---|
| Format | HTML (HyperText Markup Language) |
| Extension | .html |
| MIME type | text/html |
| Size | 5,120 bytes (5 KB) |
| Kind | Text |
| Signature | 3C 21 44 4F 43 54 59 50 45 |
| SHA-256 | d4b4075667a024ff878688993c754dd0f6c61745f02218a2ae5e496fa0b91a27 |
| Created | 2026-10-23 |
| Validation | See the listed size and SHA-256. Small downloads are checked in the browser; verify streamed downloads manually. A hash match does not prove parser compatibility. |
| Preview | Available on this page |
| Source | Generated in your browser by this site's generator; not copied from elsewhere |
| Licence | Free to use, modify and redistribute (terms) |
| Category | Documents |
Check the stated structure and checksum against your application requirements. As with any download, scan the file with your own security tools before opening it. How files are made and checked
Verify your copy
This file is created in your browser, so it has no direct URL for curl or wget. The generator is designed to produce reproducible bytes. After saving, compare the checksum with the SHA-256 value above.
sha256sum sample-html-5kb.html # Linux
shasum -a 256 sample-html-5kb.html # macOSOn Windows, run Get-FileHash sample-html-5kb.html -Algorithm SHA256 in PowerShell. For scripts and pipelines, save the file once and keep your own copy.
Related files
Questions about this file
- Is this file exactly 5 KB?
- Yes. It is 5,120 bytes, which is 5 KB in the binary units that operating systems and server limits use (1 KB = 5,120 bytes).
- What is inside the 5 KB HTML file?
- A static HTML5 page with 5 sections of headings, paragraphs, lists and tables. It has no scripts, no external resources and a noindex robots tag. An HTML comment before the closing tags brings the file 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.