20 MB XML sample

An XML file of exactly 20,971,520 bytes. It is a valid Extensible 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 20 MB sample, test or dummy XML file.

sample-xml-20mb.xml

20 MB20,971,520 bytes

Download 20 MB XML

Created in your browser in a few seconds, then checked against the SHA-256 checksum. No sign-up.

Type: application/xml
SHA-256: 69add2f03a0f76081a3c92c06e916ed001e1e6f6cb338bb86059e9f74794e1e3
Delivery: Created in your browser from static generator assets (how it works).

What is in this file

A <customers> root element holding 64,904 fictional records that mix child elements, attributes and an empty element. An XML comment before the closing tag brings the file to the exact size.

Elements	64,904 <customer> records
Root element	<customers>
Declaration	XML 1.0, UTF-8
Encoding	UTF-8 (ASCII characters only)
Line endings	LF

How the file begins

The opening lines of sample-xml-20mb.xml, exactly as they appear in the file.

00000000  3c 3f 78 6d 6c 20 76 65  72 73 69 6f 6e 3d 22 31 |<?xml version="1|
00000010  2e 30 22 20 65 6e 63 6f  64 69 6e 67 3d 22 55 54 |.0" encoding="UT|
00000020  46 2d 38 22 3f 3e 0a 3c  63 75 73 74 6f 6d 65 72 |F-8"?>.<customer|
00000030  73 20 67 65 6e 65 72 61  74 6f 72 3d 22 53 61 6d |s generator="Sam|

Preview

Creates the file in your browser and shows its first 64 KB.

Where 20 MB matters

A 20,971,520-byte file: right at the default attachment limit of Outlook, and just under the 25 MB ceilings of Gmail and GitHub web uploads. These are the default limits a file of this size is useful for testing:

System	Limit	Note
Microsoft Outlook	20 MB of attachments by default for internet mail accounts	This file is right at the limit; add a second attachment and it is exceeded.
Gmail	25 MB per message	Under the limit, although email encoding adds about a third in transit.
GitHub web uploads	25 MiB per file added through the browser	Accepted. Pushing with Git allows larger files.
Cloudflare Pages assets	25 MiB per file	The largest round size that can be served as a static asset.
Amazon API Gateway	10 MB payload	Rejected; the upload has to go directly to object storage.
ASP.NET Core (Kestrel)	About 28.6 MB request body by default	Accepted with room for the multipart overhead.

All 20 MB sample files

Use this file for

Measuring download speed from your own server or CDN
Testing feed readers and SOAP clients
Testing XML parsers and data import

Testing notes for XML

Namespaces change element identity: <name> in two namespaces is two different elements.
Parsers that resolve external entities can be made to read local files or call internal services, an attack called XXE. Disable DTD processing for untrusted input.

XML format reference

Technical details

File name	sample-xml-20mb.xml
Format	XML (Extensible Markup Language)
Extension	.xml
MIME type	application/xml
Size	20,971,520 bytes (20 MB)
Kind	Text
Signature	3C 3F 78 6D 6C
SHA-256	69add2f03a0f76081a3c92c06e916ed001e1e6f6cb338bb86059e9f74794e1e3
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	Data

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-xml-20mb.xml     # Linux
shasum -a 256 sample-xml-20mb.xml # macOS

On Windows, run Get-FileHash sample-xml-20mb.xml -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 20 MB?: Yes. It is 20,971,520 bytes, which is 20 MB in the binary units that operating systems and server limits use (1 KB = 1,024 bytes).
What is inside the 20 MB XML file?: A <customers> root element holding 64,904 fictional records that mix child elements, attributes and an empty element. An XML comment before the closing tag brings the file to the exact size.
Do the XML samples use a DTD or entities?: No. They have an XML declaration and no DOCTYPE, so they are safe for parsers with DTD processing disabled.

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