1 MB HTML sample file
An HTML file of exactly 1,048,576 bytes. It is a valid HyperText Markup Language file, generated for this site and checked with an independent parser.
Download
sample-html-1mb.html
1 MB1,048,576 bytes
Download 1 MB HTMLDirect download. No sign-up and no waiting.
- Type
- text/html
- SHA-256
9a13310435918fe856bf4bc609102f3611687f8188d4f0e1faccdda70aa2060e- Direct URL
https://sampletestfiles.com/downloads/html/sample-html-1mb.html
What is in this file
A complete HTML document with 1,865 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 | 1,865 |
|---|---|
| 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-1mb.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 MB)</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 MB)</h1>
<p>A static test page with no scripts, no external resources and no tracking.</p>
<section id="section-1">Preview
Shows the first 64 KB of the file.
Where 1 MB matters
A 1,048,576-byte file: exactly the default upload limit of nginx, Spring Boot and Next.js. These are the default limits a file of this size is useful for testing:
| System | Limit | Note |
|---|---|---|
| nginx | 1 MB by default (client_max_body_size) | A multipart upload of this file exceeds the limit by the size of the form boundaries. |
| Spring Boot multipart | 1 MB per file by default (max-file-size) | A file of exactly 1 MB is at the limit. |
| Next.js API routes and Server Actions | 1 MB by default | Larger bodies need the size limit raised in configuration. |
| Cloud Firestore documents | 1 MiB (1,048,576 bytes) | The same number of bytes as this file. |
| Apache Kafka messages | About 1 MB by default | Brokers reject larger records unless message.max.bytes is raised. |
Use this file for
- Download tests on mobile connections
- Checking Content-Type and Content-Disposition handling
- Testing scrapers and HTML-to-text conversion
Testing notes for HTML
- A text file that merely starts with a tag can be sniffed as HTML by older browsers if the Content-Type header is missing.
- Serve uploaded HTML with Content-Disposition: attachment or from a separate domain, and send X-Content-Type-Options: nosniff.
Technical details
| File name | sample-html-1mb.html |
|---|---|
| Format | HTML (HyperText Markup Language) |
| Extension | .html |
| MIME type | text/html |
| Size | 1,048,576 bytes (1 MB) |
| Kind | Text |
| Signature | 3C 21 44 4F 43 54 59 50 45 |
| SHA-256 | 9a13310435918fe856bf4bc609102f3611687f8188d4f0e1faccdda70aa2060e |
| 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-1mb.html 'https://sampletestfiles.com/downloads/html/sample-html-1mb.html'
sha256sum sample-html-1mb.html # Linux
shasum -a 256 sample-html-1mb.html # macOSOn Windows, run Get-FileHash sample-html-1mb.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 MB?
- Yes. It is 1,048,576 bytes, which is 1 MB in the binary units that operating systems and server limits use (1 KB = 1,024 bytes).
- What is inside the 1 MB HTML file?
- A complete HTML document with 1,865 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.